Da VIP Reference Library
DaVIP Natural Remedies Library
Traditional knowledge. Modern evidence. Safety first.
379 entries · every entry links to its official source
Read this first
Educational reference only. Natural does not always mean safe. Herbs and supplements can interact with medicines or medical conditions. Do not use this library to replace emergency care, prescribed treatment, or advice from a qualified health professional.
- This library gives no doses, and never any dose for a child.
- Never stop or change medicine a doctor prescribed because of anything you read here.
- "Natural" does not mean harmless — some plants damage the liver or clash badly with prescriptions.
- For an emergency, call 911. For a possible poisoning, call Poison Control at 1-800-222-1222.
Browse by what is bothering you
These lanes show entries that have something to say about a concern — sometimes only traditional use, sometimes research. Open an entry to see which.
Browse by body system
A body-system lane groups entries by the part of the body they are talked about for. It is not a claim that an entry treats anything.
Category
Tradition or region
What research shows
A–Z
379 entries
Acai
Euterpe oleracea
Traditional use — evidence not establishedA dark purple palm fruit from the Amazon, eaten as food for generations and now sold widely as juice, powder and capsules.
Herbs & BotanicalsOther Traditional SystemsInflammationMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Acai
Euterpe oleracea
Part used or form
Fruit pulp and juice of an Amazonian palm
Also called
Açaí · Açaí berry · Assai
Traditional / historical use
- Everyday food in Amazonian diets
- Digestive complaints
- General strength
Historical use is not evidence that it works.
What has been studied
- Weight loss
- Antioxidant effects
- Arthritis
Current evidence label
Traditional use — evidence not established
Acai is a nutritious fruit, but research has not shown that acai products treat or prevent any disease. Weight-loss marketing around acai is not supported by good studies.
Safety
Eating the fruit is generally considered safe. Some acai products have been sold with exaggerated weight-loss claims and in fraudulent billing schemes.
Avoid or use caution
- Be sceptical of any acai product promising weight loss
- People scheduled for an MRI have been advised to mention acai use
Children
Acai as a food is a food; acai supplements are not a children's remedy.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally mashed into a thick pulp and eaten with meals; modern forms are juice, frozen pulp, powder and capsules.
Sources and further reading
- Acai — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Musculoskeletal / pain · Metabolic · Immune / general wellness
Acupressure
Traditional use — evidence not establishedThe same point system as acupuncture, worked with pressure rather than needles, including the wristbands sold for travel sickness.
Mind-Body / Non-Drug PracticesTraditional AsianSerious safety warningSleepNauseaPainRead full entryClose entry
Acupressure
Part used or form
Firm finger or band pressure on traditional points — no needles
Also called
Pressure points · Sea-band wristbands · Tui na pressure work
Traditional / historical use
- Nausea and travel sickness
- Headache
- Muscle tension
Historical use is not evidence that it works.
What has been studied
- Nausea
- Pain
- Sleep
Current evidence label
Traditional use — evidence not established
Acupressure has been studied far less than acupuncture, and the available research is small and mixed, so its effects are not established.
Safety
Low risk since nothing pierces the skin; too much pressure can bruise or hurt.
Avoid or use caution
- Avoid pressing on injuries, wounds, varicose veins or swollen areas
- Bleeding disorders — press gently
- Do not delay medical care for ongoing symptoms
Children
Gentle pressure is low risk; travel-sickness bands are commonly sold for children.
Pregnancy and breastfeeding
Some points are traditionally avoided in pregnancy — ask a midwife or a practitioner experienced in prenatal work.
How it was traditionally prepared
Part of Chinese and Japanese bodywork traditions such as tui na and shiatsu, long practised without needles.
Sources and further reading
- Acupuncture — effectiveness and safety (includes related point-based practice) — NIH NCCIHU.S. federal health source
Related concerns
Body systems: Digestive · Nervous system / sleep · Musculoskeletal / pain
Acupuncture
Some evidenceA core practice of traditional Chinese medicine, now one of the most-studied complementary therapies in Western clinics.
Mind-Body / Non-Drug PracticesTraditional AsianSerious safety warningNauseaPainInflammationRead full entryClose entry
Acupuncture
Part used or form
Very thin needles placed at specific body points by a trained practitioner
Also called
Needling · Zhen jiu
Traditional / historical use
- Pain
- Digestive complaints
- Many conditions within traditional Chinese diagnosis
Historical use is not evidence that it works.
What has been studied
- Chronic low back pain
- Neck pain
- Knee osteoarthritis
- Migraine and tension headache
- Nausea
Current evidence label
Some evidence
Acupuncture has moderate evidence for some chronic pain conditions and for certain kinds of nausea, though how much of the effect comes from needling itself is still debated.
Safety
Relatively safe with a licensed practitioner using sterile single-use needles. Soreness and minor bruising are common; serious problems such as infection or punctured lung are rare and usually linked to untrained practice.
Avoid or use caution
- Use a licensed practitioner with single-use sterile needles
- Bleeding disorders or blood-thinner use
- Pacemakers — electroacupuncture needs discussion
- Never replace urgent medical care with acupuncture
Medicine interactions
- Bleeding risk matters with blood thinners — tell the practitioner
Children
Only with a practitioner experienced with children, and with a parent's consent.
Pregnancy and breastfeeding
Some practitioners work with pregnancy; tell them you are pregnant. Ask a midwife first.
How it was traditionally prepared
Practised for over two thousand years in China, historically with metal needles and detailed point systems.
Sources and further reading
- Acupuncture — effectiveness and safety — NIH NCCIHU.S. federal health source
Related concerns
Body systems: Digestive · Musculoskeletal / pain
Agaricus Blazei
Agaricus subrufescens (syn. Agaricus blazei)
Limited / mixed evidenceA Brazilian-origin mushroom, sometimes called the 'sun mushroom' or 'God's mushroom', popularized after Japanese researchers investigated it for immune-related properties, and now sold worldwide as a supplement.
Herbs & BotanicalsTraditional AsianOther Traditional SystemsHigh caution — do not self-treatOtherRead full entryClose entry
Agaricus Blazei
Agaricus subrufescens (syn. Agaricus blazei)
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Rare reports of liver injury associated with Agaricus blazei supplements
Part used or form
Dried fruiting body, taken as powder, capsule or extract
How it is used
By mouth
Also called
Agaricus subrufescens · Himematsutake · Sun mushroom · Cogumelo do sol
Traditional / historical use
- A folk tonic in Brazilian traditional practice, later adopted into Japanese supplement culture
Historical use is not evidence that it works.
What has been studied
- Immune-marker changes in small laboratory and human studies
- Quality-of-life outcomes alongside chemotherapy in a small number of trials
Current evidence label
Limited / mixed evidence
Most research on Agaricus blazei is preliminary — laboratory work and small human trials looking at immune markers or quality of life alongside chemotherapy — and it is not large or consistent enough to support specific health claims. Some mushrooms and mushroom extracts are marketed with cancer-related claims. No mushroom or mushroom supplement treats, cures or prevents cancer, and none should ever replace or delay a prescribed cancer treatment; anyone with cancer should talk with their oncology team before adding any mushroom supplement.
Safety
Short-term use in small studies has generally been reported as well tolerated, but rare cases of liver injury associated with Agaricus blazei supplements have been described in the medical literature.
Avoid or use caution
- Existing liver disease
- People on immune-suppressing medicines after transplant, without medical guidance
Medicine interactions
- Theoretical interaction with immune-suppressing medicines after transplant
Children
Not established as safe in children and not recommended for them.
Pregnancy and breastfeeding
Not studied for pregnancy or breastfeeding safety, so it is best avoided in both.
How it was traditionally prepared
Dried and ground into powder or capsules; historically brewed as a folk tea in Brazil before becoming a manufactured supplement.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- LiverTox — herbal and dietary supplements section — NIH NIDDK / NCBI BookshelfU.S. federal health source
- Traditional, complementary and integrative medicine — health topic — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Immune / general wellness
Allspice
Pimenta dioica
Traditional use — evidence not establishedA Caribbean-native spice whose dried berries taste like a blend of cinnamon, clove and nutmeg, long used in Caribbean and Latin American kitchens and folk remedies.
Foods & Kitchen RemediesTraditional African / African DiasporaOther Traditional SystemsDigestionGeneral NutritionRead full entryClose entry
Allspice
Pimenta dioica
Part used or form
Dried unripe berries, whole or ground
How it is used
By mouth
Also called
Pimento · Jamaica pepper
Traditional / historical use
- Digestive discomfort
- Flavoring for meats, baked goods and drinks
- Folk remedy for muscle aches applied as a poultice
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Allspice is well documented as a traditional Caribbean flavoring and folk remedy, but there is no substantial modern clinical research on it as a treatment for any condition.
Safety
Ordinary amounts used to season food are considered safe for most people. Concentrated allspice oil is more irritating and is not the same as the culinary spice.
Avoid or use caution
- Concentrated essential oil on the skin or swallowed
- Known allergy to eugenol-containing spices (clove, allspice)
Medicine interactions
- Essential oil forms may add to the effect of blood-thinning medicines
Children
Fine as a food seasoning. Concentrated allspice oil is not appropriate for children. Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract.
Pregnancy and breastfeeding
Ordinary use as a food seasoning is common. Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract.
How it was traditionally prepared
Whole dried berries added to stews, marinades, baked goods and mulled drinks, or ground into spice blends.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Almonds
Prunus dulcis
Some evidenceA tree nut long used in Mediterranean and Middle Eastern eating patterns, now studied mainly for its role in heart-healthy diets.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsHeart/CirculationMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Almonds
Prunus dulcis
Part used or form
Whole nut — raw, roasted, or as a spread or milk
How it is used
By mouth
Also called
Almond nuts · Raw almonds · Roasted almonds
Traditional / historical use
- Everyday eating
- Traditional Mediterranean and Middle Eastern cooking
- A snack in place of processed foods
Historical use is not evidence that it works.
What has been studied
- Blood cholesterol as part of an overall diet pattern
- Blood sugar control alongside other foods
Current evidence label
Some evidence
Nuts including almonds are part of eating patterns that health agencies link to healthier cholesterol levels, mainly because they replace saturated fat and refined carbohydrate in the diet rather than acting like a medicine on their own.
Safety
Tree nuts are a common and sometimes serious food allergen. Choking is a real risk for young children given whole nuts. Nuts are calorie-dense, which matters for anyone watching weight.
Avoid or use caution
- Known tree nut allergy — can cause a severe reaction
- Whole nuts are a choking hazard for young children
- Weight management goals — nuts are calorie-dense even though they are nutritious
Children
Whole almonds are a choking hazard for young children; smooth almond butter thinned into food is the safer form. Tree nut allergy can be serious — introduce new nut foods with a pediatrician's guidance if there is any family history of food allergy.
Pregnancy and breastfeeding
Ordinary food for most pregnant people without a nut allergy; no special restriction is described in general nutrition guidance.
How it was traditionally prepared
Eaten raw or roasted, ground into almond butter or flour, or soaked and blended into almond milk.
Sources and further reading
- How to lower cholesterol with diet — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Metabolic
Aloe Gel (Topical)
Aloe vera
Limited / mixed evidenceThe clear gel squeezed from an aloe leaf, applied directly to minor burns, sunburn and dry skin.
Topical / SkinTraditional African / African DiasporaTraditional AsianOther Traditional SystemsSkinRead full entryClose entry
Aloe Gel (Topical)
Aloe vera
Part used or form
Clear gel from the inner leaf, applied to the skin
How it is used
On the skin
Also called
Aloe vera gel · Aloe leaf gel
Traditional / historical use
- Minor burns and sunburn
- Dry or irritated skin
- Minor skin scrapes
Historical use is not evidence that it works.
What has been studied
- Sunburn comfort
- Minor first-degree burns
- Mild psoriasis plaques
Current evidence label
Limited / mixed evidence
Small studies suggest topical aloe gel can soothe minor burns and dry skin, but the research is limited and mixed, and aloe is not a substitute for burn care beyond minor, superficial injuries.
Safety
Topical aloe gel is generally well tolerated. Occasional contact allergy occurs. This entry is about the gel on skin only — swallowed aloe latex/juice is a separate, harsher product covered in the aloe vera entry.
Avoid or use caution
- Open, deep, large or infected wounds — see a clinician instead of self-treating
- Known allergy to aloe or related plants (lily family)
- Stop if redness, itching or rash develops
Medicine interactions
- None well documented for the topical gel
Children
Topical aloe gel is commonly used on children's minor sunburn; keep it away from open wounds and eyes.
Pregnancy and breastfeeding
Topical use on intact skin is generally considered low risk; this does not apply to swallowed aloe products.
How it was traditionally prepared
Fresh leaf split open and the inner gel rubbed directly onto skin, or a stabilized commercial gel.
Sources and further reading
- Aloe vera — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Burns — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Related remedies
Aloe Vera
Aloe vera
Limited / mixed evidenceA thick-leaved succulent whose clear inner gel has been put on burns, scrapes and dry skin across many cultures.
Topical / SkinTraditional African / African DiasporaTraditional European / AmericanDigestionSkinRead full entryClose entry
Aloe Vera
Aloe vera
Part used or form
Clear leaf gel (topical) and dried leaf latex (oral)
Also called
Aloe · Burn plant · Lily of the desert
Traditional / historical use
- Minor burns and sunburn
- Cuts and scrapes
- Dry or itchy skin
- Constipation (oral latex)
Historical use is not evidence that it works.
What has been studied
- Burn and wound healing
- Psoriasis
- Constipation
- Ulcerative colitis
Current evidence label
Limited / mixed evidence
Topical aloe gel may help some minor burns and skin conditions, but study results are mixed and often small. Taken by mouth, aloe latex is a strong laxative that is no longer considered safe for over-the-counter laxative use.
Safety
Aloe gel on unbroken skin is usually well tolerated. Swallowing aloe latex can cause cramping and diarrhoea, and long-term oral use has been linked to serious harm.
Avoid or use caution
- Do not put aloe in deep or serious wounds
- Avoid swallowing aloe latex as a laxative
- Seek care for burns that blister, are large, or involve the face, hands or genitals
Medicine interactions
- Oral aloe may lower potassium, which matters with heart medicines such as digoxin
- Oral aloe may add to the effect of laxatives and diuretics
- May affect blood sugar with diabetes medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Oral aloe is generally advised against in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
The cut leaf was traditionally split and the clear gel wiped directly onto skin; the bitter yellow latex was dried and swallowed as a purgative.
Sources and further reading
- Aloe vera — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Skin
Amla
Phyllanthus emblica
Limited / mixed evidenceA sour, vitamin C-rich fruit used for centuries in Ayurvedic medicine and eaten fresh, dried, pickled, or as a component of the herbal blend triphala.
Herbs & BotanicalsOther Traditional SystemsSerious safety warningGeneral NutritionDigestionMetabolic/Blood SugarRead full entryClose entry
Amla
Phyllanthus emblica
Part used or form
Dried or fresh fruit, fruit powder
How it is used
By mouth
Also called
Indian gooseberry · Emblica officinalis · Amalaki
Traditional / historical use
- General 'tonic' or rejuvenating use
- Digestive complaints
- Hair and skin care
Historical use is not evidence that it works.
What has been studied
- Antioxidant content
- Cholesterol and blood sugar (small human trials)
Current evidence label
Limited / mixed evidence
Amla is a genuinely rich source of vitamin C and plant antioxidants, and small human trials have looked at effects on cholesterol and blood sugar, but the trials are few, short and not enough to call any specific health claim proven.
Safety
Eating the fruit or using it as a food ingredient is considered safe for most people. Concentrated supplement extracts have not been as thoroughly studied for safety.
Avoid or use caution
- Bleeding disorders
- Diabetes medicines
- Planned surgery
Medicine interactions
- May add to the effect of blood sugar-lowering medicines
- May add to the effect of blood-thinning medicines
Children
Amla fruit is eaten as a food in some cultures, but concentrated supplements are not advised for children without a pediatrician's guidance.
Pregnancy and breastfeeding
Amla as a food is generally fine; concentrated supplement extracts have not been well studied in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh or dried fruit was traditionally eaten, pickled, pressed for juice, or dried and powdered for inclusion in herbal blends such as triphala.
Sources and further reading
- Vitamin C — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Traditional medicine — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic · Immune / general wellness
Related remedies
Andrographis
Andrographis paniculata
Limited / mixed evidenceA very bitter leafy plant used in South and Southeast Asian traditional medicine, now sold as a supplement mainly for colds.
Herbs & BotanicalsTraditional AsianSerious safety warningCough/ColdSore ThroatRead full entryClose entry
Andrographis
Andrographis paniculata
Part used or form
Dried aerial parts (leaf and stem)
How it is used
By mouth
Also called
King of bitters · Kalmegh
Traditional / historical use
- Colds and fevers
- Sore throat
- Digestive complaints
- General 'bitter tonic' use
Historical use is not evidence that it works.
What has been studied
- Common cold symptoms
- Upper respiratory tract infections
Current evidence label
Limited / mixed evidence
Some studies suggest andrographis, often combined with other herbs, may modestly shorten cold symptoms, but trials are small, vary in quality, and are not enough to call it proven treatment.
Safety
Short-term use appears reasonably well tolerated for most adults, though it can upset the stomach, and allergic reactions have been reported.
Avoid or use caution
- Bleeding disorders
- Low blood pressure
- Planned surgery
- Autoimmune conditions
Medicine interactions
- May add to the effect of blood pressure medicines
- May add to the effect of blood-thinning medicines
- May affect medicines that suppress the immune system
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. There are concerns it may affect fertility or pregnancy.
How it was traditionally prepared
Traditionally the bitter dried leaf and stem were simmered into a decoction or ground into a bitter powder.
Sources and further reading
- Andrographis — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Immune / general wellness
Related remedies
Angelica Root
Angelica archangelica
Traditional use — evidence not establishedA tall northern European plant whose aromatic root has long been used in bitters, liqueurs and folk digestive remedies. It is a different plant from dong quai (Angelica sinensis), which is used in East Asian tradition.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningDigestionOtherRead full entryClose entry
Angelica Root
Angelica archangelica
Part used or form
Dried root
How it is used
By mouth
Also called
Garden angelica · Wild celery · Archangel root
Traditional / historical use
- Indigestion and bloating
- Loss of appetite
- Colds (as a warming tonic)
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Angelica archangelica root has a long history of use as a bitter digestive aid in European herbalism, but there is little reliable human research on it, so no health claim is established.
Safety
The root's compounds (furanocoumarins) can make skin more sensitive to sunlight, especially with the essential oil on the skin, and safety has not been well studied over long-term use.
Avoid or use caution
- Bleeding disorders
- Planned surgery
- Sun-sensitive skin conditions
Medicine interactions
- May add to the effect of blood-thinning medicines
- May increase sun sensitivity when combined with other photosensitizing medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried root was traditionally simmered into a bitter decoction, steeped in wine or liqueur, or chewed in small pieces.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Skin
Related remedies
Anise Seed
Pimpinella anisum
Limited / mixed evidenceA licorice-scented seed used across Mediterranean, Middle Eastern and European traditions as a digestive aid, flavoring, and ingredient in cough remedies.
Herbs & BotanicalsTraditional European / AmericanOther Traditional SystemsDigestionCough/ColdRead full entryClose entry
Anise Seed
Pimpinella anisum
Part used or form
Dried seed
How it is used
By mouth
Also called
Aniseed · Pimpinella anisum
Traditional / historical use
- Indigestion and gas
- Cough and mild bronchial complaints
- Supporting milk supply in nursing mothers (folk use)
Historical use is not evidence that it works.
What has been studied
- Indigestion (small trials, often as part of herbal blends)
Current evidence label
Limited / mixed evidence
Anise has a long culinary and folk-medicine history for digestion, and a handful of small trials of anise-containing blends suggest possible mild benefit for indigestion, but evidence for anise seed alone is thin.
Safety
Anise used as a culinary spice or occasional tea is considered safe for most adults. Concentrated anise oil is much stronger and allergic reactions have been reported, particularly in people sensitive to related plants like fennel or celery.
Avoid or use caution
- Allergy to fennel, celery, carrot or related plants
- Hormone-sensitive conditions
Medicine interactions
- May add to the effect of hormone-sensitive medicines (theoretical, due to plant estrogen-like compounds)
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried seeds were traditionally crushed and steeped as tea, chewed after meals, or infused into cough syrups.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Indigestion — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Respiratory
Related remedies
Apple Cider Vinegar
Limited / mixed evidenceVinegar made from fermented apples, used in cooking for centuries and heavily marketed today for weight loss and blood sugar, well beyond what the evidence shows.
Foods & Kitchen RemediesTraditional European / AmericanMetabolic/Blood SugarDigestionGeneral NutritionRead full entryClose entry
Apple Cider Vinegar
Part used or form
Fermented apple juice, used as a liquid or diluted drink
How it is used
By mouth
Also called
ACV · Cider vinegar
Traditional / historical use
- Food preservation and pickling
- A folk tonic diluted in water
- Salad dressings
Historical use is not evidence that it works.
What has been studied
- Blood sugar response after meals
- Weight loss (marketing claim)
Current evidence label
Limited / mixed evidence
Some small studies suggest vinegar taken with a meal may blunt the rise in blood sugar afterward, but results are inconsistent and it is not a treatment for diabetes. The popular claim that apple cider vinegar melts fat or causes meaningful weight loss on its own is not supported by reliable evidence — weight control depends on overall diet and activity, not a single food or drink.
Safety
Undiluted vinegar is acidic enough to erode tooth enamel and irritate or burn the throat and esophagus if drunk repeatedly or straight. Diluted in water or used in food, it is low risk for most people.
Avoid or use caution
- Never drink undiluted — dilute well in water and rinse the mouth afterward
- Existing tooth enamel erosion, acid reflux, or esophagus problems
- Diabetes medicines that already lower blood sugar
Medicine interactions
- May lower blood sugar further when combined with diabetes medicines, raising the risk of it going too low
- Long-term high intake has been linked to lower potassium levels in case reports
Children
Undiluted vinegar is harsh on a child's mouth and throat; there is no established reason for a child to drink it as a remedy.
Pregnancy and breastfeeding
Ordinary vinegar used in cooking or dressings is fine; there is no established reason to drink concentrated vinegar during pregnancy, and it should be avoided undiluted like anyone else.
How it was traditionally prepared
Made by fermenting apple juice first into alcohol and then into acetic acid; used undiluted in cooking or diluted in water as a folk drink.
Sources and further reading
- Diabetes — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Heartburn — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Tooth disorders — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
Apples
Malus domestica
Some evidenceA common everyday fruit valued mainly as a source of dietary fibre and, when eaten with the skin, a range of plant antioxidants.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsDigestionMetabolic/Blood SugarHeart/CirculationGeneral NutritionRead full entryClose entry
Apples
Malus domestica
Part used or form
Whole fruit, raw or cooked, with or without skin
How it is used
By mouth
Also called
Apple
Traditional / historical use
- Everyday eating
- Folk saying linking apples to general health
- Cooked into sauces and desserts
Historical use is not evidence that it works.
What has been studied
- Dietary fibre intake and bowel regularity
- Cholesterol as part of an overall diet pattern
Current evidence label
Some evidence
Apples contribute fibre (including pectin) and antioxidants that nutrition guidance links to healthier cholesterol and steadier blood sugar when eaten as part of an overall fruit-and-vegetable-rich diet. No single fruit prevents or treats disease on its own; the old saying about apples and doctors is a saying, not a clinical claim.
Safety
Safe as food for almost everyone. Whole apples, especially with skin, are a choking risk for young children, and apple seeds contain a small amount of a cyanide-forming compound that is not a concern from occasional accidental swallowing but should not be deliberately chewed in quantity.
Avoid or use caution
- Whole apple pieces are a choking hazard for young children
- Apple seeds should not be chewed or eaten in quantity
Children
Serve to young children as thin slices, cooked, or grated rather than whole or in large chunks, and remove the core and seeds. Whole raw apple is a common choking hazard in toddlers.
Pregnancy and breastfeeding
Ordinary food during pregnancy; wash the skin well and there is no established restriction.
How it was traditionally prepared
Eaten raw, baked, stewed into sauce, dried into rings, or pressed into juice or cider.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- How to lower cholesterol with diet — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular · Metabolic
Related remedies
Apricots
Prunus armeniaca
Limited / mixed evidenceA stone fruit providing vitamin A precursors, fibre and potassium, eaten fresh or dried; the apricot kernel is a different and unsafe product, not the fruit itself.
Foods & Kitchen RemediesOther Traditional SystemsTraditional AsianTraditional European / AmericanHigh caution — do not self-treatDigestionGeneral NutritionOtherRead full entryClose entry
Apricots
Prunus armeniaca
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Apricot kernels (seeds), a different product from the fruit, are a documented poisoning risk
Part used or form
Fresh or dried fruit (not the seed/kernel, which is a separate, unsafe product covered under safety notes)
How it is used
By mouth
Also called
Apricot · Dried apricots
Traditional / historical use
- Everyday eating, fresh or dried
- Dried apricots as a traditional preserved snack along trade routes
Historical use is not evidence that it works.
What has been studied
- Vitamin A precursor and fibre intake as part of overall diet
Current evidence label
Limited / mixed evidence
Apricot flesh is a source of beta-carotene (a vitamin A precursor), fibre and potassium, fitting ordinary healthy-eating guidance. This entry covers only the fruit flesh; apricot kernels/seeds contain compounds that release cyanide and have caused real poisonings when eaten as an alternative-medicine product — they are a distinct and unsafe item, not part of ordinary fruit eating.
Safety
The fruit flesh is safe as food for almost everyone. Apricot kernels (seeds) are not safe to eat and have caused cyanide poisoning; they should never be treated as a food or remedy.
Avoid or use caution
- Apricot kernels/seeds should never be eaten — they are a documented source of cyanide poisoning, unlike the fruit flesh
- Dried apricots are calorie- and sugar-concentrated compared with fresh
Children
Fresh or dried apricot flesh, pitted and cut small, is fine for most children; apricot pits/kernels must never be given to a child.
Pregnancy and breastfeeding
Ordinary apricot flesh as food is fine during pregnancy; apricot kernels should be avoided by everyone, pregnant or not.
How it was traditionally prepared
Eaten fresh, dried, or stewed into preserves; kernels historically pressed for oil in some regions but not eaten as food.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Immune / general wellness
Related remedies
Arnica
Arnica montana
Limited / mixed evidenceA yellow mountain flower long applied to the skin in European folk medicine for bruises and sore muscles. It is a very different matter when swallowed.
Topical / SkinTraditional European / AmericanHigh caution — do not self-treatPainInflammationSkinRead full entryClose entry
Arnica
Arnica montana
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Unsafe to swallow — the plant taken by mouth has caused serious poisoning
Part used or form
Dried flower head, used topically as gel, cream or diluted tincture
How it is used
On the skin
Also called
Leopard's bane · Mountain tobacco
Traditional / historical use
- Bruises
- Muscle soreness and sprains
- Minor swelling
Historical use is not evidence that it works.
What has been studied
- Bruising after cosmetic procedures
- Osteoarthritis pain (topical gels)
Current evidence label
Limited / mixed evidence
Small studies of topical arnica gels for bruising and mild osteoarthritis pain show some promise, but results are mixed and many trials are small or industry-funded.
Safety
Topical arnica on unbroken skin is generally considered reasonably safe for short-term use and can cause skin irritation or allergic rash. Swallowing the plant or undiluted tincture is a different matter: it is unsafe and has caused serious poisoning, so oral use beyond highly diluted homeopathic preparations is not described here as a home remedy.
Avoid or use caution
- Do not apply to broken skin or open wounds
- Do not swallow arnica flower, tincture or essential oil
- Stop if a skin rash develops
Medicine interactions
- May add to the effect of blood-thinning medicines if absorbed in quantity
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Topical use has not been well studied in pregnancy; oral use is not advised. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried flower heads were traditionally infused in alcohol to make a tincture that was diluted before being rubbed on unbroken skin, or made into a salve.
Sources and further reading
- Arnica — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Musculoskeletal / pain
Related remedies
Aromatherapy
Limited / mixed evidenceUsing concentrated plant aromas for mood and comfort — incense, steam, diffusers and diluted massage oils.
Oils & AromaticsTraditional European / AmericanOther Traditional SystemsSerious safety warningSleepStress/AnxietyNauseaPainRead full entryClose entry
Aromatherapy
Part used or form
Inhaled or diluted-topical plant essential oils
Also called
Essential oil therapy · Diffused oils · Inhaled aromatics
Traditional / historical use
- Calm and sleep
- Ritual and religious use
- Scenting rooms and linens
Historical use is not evidence that it works.
What has been studied
- Anxiety
- Nausea
- Sleep
- Pain during procedures
Current evidence label
Limited / mixed evidence
Small studies of inhaled essential oils report modest effects on anxiety and nausea, but the research is limited and hard to blind, so results are not conclusive.
Safety
Essential oils are highly concentrated. Swallowing them can be poisonous, undiluted oils can burn or sensitise skin, and diffused oils can trigger asthma or affect pets.
Avoid or use caution
- Never swallow essential oils
- Always dilute before skin contact and patch-test
- Asthma or fragrance sensitivity
- Keep bottles locked away — essential-oil poisonings in children are common
- Some oils are toxic to cats and dogs
Medicine interactions
- Skin reactions may compound other topical treatments
Children
Essential oils are a leading cause of household poisonings in small children, and menthol or eucalyptus oils must never be applied near a young child's face.
Pregnancy and breastfeeding
Ask a midwife which oils to avoid; keep exposure light.
How it was traditionally prepared
Resins and aromatic woods were burned as incense; distillation of essential oils spread from the medieval Islamic world into Europe.
Sources and further reading
- Aromatherapy — NCCIH overview — NIH NCCIHU.S. federal health source
- Lavender — NCCIH fact sheet — NIH NCCIHU.S. federal health source
Related concerns
Body systems: Digestive · Nervous system / sleep · Musculoskeletal / pain
Art Therapy
Limited / mixed evidenceUsing drawing, painting or other visual art-making, guided by a trained art therapist, to help people process emotions or cope with illness and stress.
Mind-Body / Non-Drug PracticesTraditional European / AmericanStress/AnxietyOtherRead full entryClose entry
Art Therapy
Part used or form
Guided drawing, painting or other visual art-making with a trained art therapist
How it is used
Whole-body practice — guided creative sessions with a trained therapist
Also called
Creative arts therapy · Expressive arts therapy
Traditional / historical use
No documented traditional use recorded here.
Historical use is not evidence that it works.
What has been studied
- Anxiety and mood in cancer care
- Stress
- Coping in chronic illness
- Dementia-related wellbeing
Current evidence label
Limited / mixed evidence
There is no dedicated NCCIH page on art therapy specifically. Small trials, mainly in cancer and mental-health settings, suggest art therapy can modestly ease anxiety and improve mood and quality of life, but the field lacks large, rigorous trials, so effects are considered supportive rather than firmly proven.
Safety
Very low risk. Working through difficult emotions can occasionally bring up distress, which a trained therapist is prepared to help process.
Avoid or use caution
- Acute crisis or severe distress — pair art therapy with appropriate mental-health support rather than using it alone
Children
Art therapy is commonly and safely used with children to help express feelings they may struggle to put into words.
Pregnancy and breastfeeding
Generally considered safe as a supportive, low-risk activity.
How it was traditionally prepared
Emerged as a distinct clinical profession in the mid-20th century, drawing on much longer traditions of art-making for reflection and healing.
Sources and further reading
- Anxiety — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Depression — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep
Related remedies
Artichoke Leaf
Cynara scolymus
Limited / mixed evidenceThe leaves of the same plant whose flower bud is eaten as a vegetable, used in European herbal tradition for digestion and the liver.
Herbs & BotanicalsTraditional European / AmericanDigestionMetabolic/Blood SugarRead full entryClose entry
Artichoke Leaf
Cynara scolymus
Part used or form
Dried leaf extract
How it is used
By mouth
Also called
Globe artichoke
Traditional / historical use
- Indigestion and bloating
- 'Liver tonic' use
- Loss of appetite
Historical use is not evidence that it works.
What has been studied
- Indigestion (dyspepsia)
- Cholesterol levels
- Irritable bowel symptoms
Current evidence label
Limited / mixed evidence
Some trials suggest artichoke leaf extract may ease indigestion symptoms and modestly affect cholesterol, but the studies are small and not consistent enough to be conclusive.
Safety
Generally considered well tolerated by most adults short-term; some people notice gas or an allergic reaction, especially those allergic to ragweed-family plants.
Avoid or use caution
- Allergy to ragweed, marigolds, daisies or related plants
- Gallstones or bile duct blockage
Medicine interactions
- May add to the effect of cholesterol-lowering or diabetes medicines
- May increase bile flow, which matters with bile duct blockage
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried leaves were traditionally steeped as a bitter infusion or pressed for juice before modern standardized extracts existed.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Indigestion — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Asafoetida
Ferula assa-foetida
Traditional use — evidence not establishedA strong-smelling dried resin from a Central and South Asian plant, used in tiny pinches in South Asian cooking and traditionally for digestive complaints.
Herbs & BotanicalsTraditional AsianSerious safety warningDigestionRead full entryClose entry
Asafoetida
Ferula assa-foetida
Part used or form
Dried resin from the plant's root, sold as a pungent powder
How it is used
By mouth
Also called
Hing · Devil's dung
Traditional / historical use
- Digestive discomfort and bloating
- Traditional remedy for colic
- Flavoring in South Asian lentil and vegetable dishes
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Asafoetida has a long history in Ayurvedic and South Asian cooking traditions for digestive complaints, but there is no substantial modern clinical research confirming a digestive benefit.
Safety
Ordinary amounts used to season food are considered safe for most people. In larger, non-culinary amounts it has been linked to headache, gas and mouth or lip swelling in some people.
Avoid or use caution
- Bleeding disorders or blood-thinning medicines
- Known sensitivity to the resin
Medicine interactions
- May affect blood clotting
- May affect blood pressure medicines
Children
Used in tiny culinary pinches in some traditional infant and toddler food remedies, but this is not medically established; check with the child's doctor first.
Pregnancy and breastfeeding
Traditionally avoided in larger amounts during pregnancy in some South Asian practice; Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract.
How it was traditionally prepared
A pinch of the powdered resin fried in oil at the start of cooking lentils, vegetables or pickles.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Traditional medicine — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Ashwagandha
Withania somnifera
Limited / mixed evidenceA root used in Ayurvedic practice in India, now widely sold as a supplement for stress and sleep.
Herbs & BotanicalsTraditional AsianSerious safety warningSleepStress/AnxietyRead full entryClose entry
Ashwagandha
Withania somnifera
Part used or form
Root, sometimes leaf
Also called
Indian ginseng · Winter cherry
Traditional / historical use
- Stress and fatigue
- Sleep
- General strengthening (a 'rasayana' tonic)
Historical use is not evidence that it works.
What has been studied
- Stress and anxiety
- Sleep quality
- Athletic performance
Current evidence label
Limited / mixed evidence
Small studies suggest possible benefit for stress and sleep, but they are short, differ in what they measured, and are not strong enough to be conclusive.
Safety
Short-term use appears well tolerated for many people, but there are reports of liver injury linked to ashwagandha products, and it can upset the stomach.
Avoid or use caution
- Liver disease
- Thyroid conditions
- Autoimmune conditions
- Stop and seek care for yellowing skin, dark urine or unusual tiredness
Medicine interactions
- May add to the effect of sedatives
- May affect thyroid medicines and thyroid hormone levels
- May affect medicines that suppress the immune system
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditionally avoided in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Classically the dried root was powdered and taken in warm milk or ghee; today it is sold as capsules, powders and extracts.
Sources and further reading
- Ashwagandha — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Nervous system / sleep
Asian Ginseng
Panax ginseng
Limited / mixed evidenceOne of the best-known roots in traditional Chinese and Korean practice, used as a tonic for energy and stamina.
Herbs & BotanicalsTraditional AsianSerious safety warningMetabolic/Blood SugarRead full entryClose entry
Asian Ginseng
Panax ginseng
Part used or form
Root
Also called
Korean ginseng · Panax ginseng · Red ginseng
Traditional / historical use
- Energy and stamina
- Recovery from illness
- Concentration
Historical use is not evidence that it works.
What has been studied
- Fatigue
- Diabetes and blood sugar
- Cognitive function
- Immune function
Current evidence label
Limited / mixed evidence
Ginseng has been studied a great deal, but results are inconsistent and many studies are small or poorly designed, so its effects remain unproven.
Safety
Short-term use is generally well tolerated; headache, sleep trouble and digestive upset are reported. Long-term use is less well studied.
Avoid or use caution
- Diabetes
- Bleeding disorders or blood-thinner use
- Before surgery
Medicine interactions
- May affect blood sugar with diabetes medicines
- May interact with warfarin and other blood thinners
- May interact with some antidepressants and stimulants
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally simmered as a decoction, steamed and dried as 'red ginseng', or sliced into soups and teas.
Sources and further reading
- Asian ginseng — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Metabolic
Astragalus
Astragalus membranaceus
Traditional use — evidence not establishedA sliced root used in traditional Chinese medicine, usually simmered with other herbs in soups and broths.
Herbs & BotanicalsTraditional AsianSerious safety warningCough/ColdHeart/CirculationRead full entryClose entry
Astragalus
Astragalus membranaceus
Part used or form
Root
Also called
Huang qi · Milk vetch
Traditional / historical use
- Strengthening after illness
- Colds
- Fatigue
Historical use is not evidence that it works.
What has been studied
- Immune function
- Heart failure
- Side effects of cancer treatment
Current evidence label
Traditional use — evidence not established
Astragalus has not been well studied in people. Existing trials are small or hard to interpret, so its benefits are not established.
Safety
Appears reasonably well tolerated in the short term. Certain species of astragalus are toxic to livestock and are not the species used medicinally.
Avoid or use caution
- Autoimmune conditions
- After an organ transplant
Medicine interactions
- May affect medicines that suppress the immune system
- May interact with lithium
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally simmered as a decoction or added as dried slices to soup.
Sources and further reading
- Astragalus — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory · Cardiovascular
Avocado
Persea americana
Some evidenceA fruit native to Central America, unusually rich in monounsaturated fat, now a staple in heart-healthy eating patterns worldwide.
Foods & Kitchen RemediesOther Traditional SystemsTraditional European / AmericanHeart/CirculationGeneral NutritionRead full entryClose entry
Avocado
Persea americana
Part used or form
Fruit flesh — eaten fresh, mashed, or in oil form
How it is used
By mouth
Also called
Alligator pear
Traditional / historical use
- Everyday food in Central and South American, Caribbean, and now global cooking
Historical use is not evidence that it works.
What has been studied
- Blood cholesterol as part of an overall diet
- Replacing saturated fat in the diet
Current evidence label
Some evidence
Avocado is high in monounsaturated fat, the type of fat linked to healthier cholesterol levels when it replaces saturated fat in the overall diet. It is a food, not a treatment for existing heart or cholesterol disease.
Safety
Very low risk as food for most people. It is calorie-dense, which matters for weight management, and a latex-fruit allergy cross-reaction (avocado, banana, kiwi) exists in some people with latex allergy.
Avoid or use caution
- Latex allergy — some people react to avocado too
- Warfarin — keep vitamin K intake fairly consistent rather than swinging widely
Medicine interactions
- Contains vitamin K, which can matter for people on warfarin — consistency of intake matters more than avoiding it
Children
Mashed avocado is a common early food for babies and children; no special restriction beyond usual allergy awareness.
Pregnancy and breastfeeding
Ordinary food, commonly recommended as a source of healthy fat and folate during pregnancy.
How it was traditionally prepared
Eaten fresh mashed or sliced, blended into sauces and dips, or pressed into oil.
Sources and further reading
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- How to lower cholesterol with diet — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Metabolic
Related remedies
Ayurvedic Medicine (as a System)
Traditional use — evidence not establishedA traditional system of medicine that originated in India thousands of years ago, organized around concepts such as doshas (constitutional types) and using herbal formulas, diet, bodywork, yoga and lifestyle guidance.
Mind-Body / Non-Drug PracticesTraditional AsianOther Traditional SystemsHigh caution — do not self-treatOtherRead full entryClose entry
Ayurvedic Medicine (as a System)
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Some traditional Ayurvedic products have been found contaminated with lead, mercury or arsenic, causing heavy-metal poisoning in documented cases
Part used or form
A broader diagnostic and treatment system combining herbal formulas, diet, bodywork, yoga and lifestyle guidance
How it is used
Whole-body practice and system of care, combining multiple therapies
Also called
Ayurveda
Traditional / historical use
- Broad diagnosis and treatment within its own theoretical framework
- Constitutional balance and preventive health
Historical use is not evidence that it works.
What has been studied
- Some individual Ayurvedic herbs and formulas have been studied for specific conditions; the dosha framework itself has not been validated with modern research methods
Current evidence label
Traditional use — evidence not established
Some individual herbs used in Ayurveda have been studied for specific effects with mixed results, but Ayurveda's core theoretical framework of doshas has not been validated by modern scientific research, and the system as a whole has not been shown in rigorous trials to treat disease. Respecting Ayurveda as a longstanding medical tradition does not mean its explanatory concepts have been scientifically confirmed.
Safety
Safety varies by component. A meaningful concern documented by U.S. and international testing is that some traditional Ayurvedic products, particularly certain imported herbal-metal (rasa shastra) preparations, have been found contaminated with lead, mercury or arsenic, sometimes at levels that caused heavy-metal poisoning.
Avoid or use caution
- Products claiming to contain heavy metals as ingredients (rasa shastra) or imported unregulated Ayurvedic products — these have been linked to lead, mercury and arsenic poisoning
- Tell every provider, conventional and Ayurvedic, about all treatments you are using
- Do not delay diagnosis or treatment of a serious condition in favor of Ayurveda alone
Medicine interactions
- Ayurvedic herbal formulas can interact with prescription medicines — tell all providers about everything you take
Children
Heavy-metal contamination risks make unregulated Ayurvedic herbal products particularly unsuitable for children without a qualified physician's involvement.
Pregnancy and breastfeeding
Avoid unregulated Ayurvedic herbal-metal formulas entirely in pregnancy because of documented heavy-metal contamination risk; discuss any Ayurvedic treatment with an obstetric provider first.
Historical and cultural background
One of the world's oldest documented medical systems, deeply tied to Indian cultural and philosophical history; described here respectfully as a tradition, not as scientifically validated in the way conventional medicine is validated.
How it was traditionally prepared
Ayurveda's classical texts date back roughly 3,000 years in the Indian subcontinent and remain part of both traditional and, in India, formally regulated healthcare today.
Sources and further reading
- Ayurvedic medicine — in depth — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Immune / general wellness
Related remedies
Bacopa (Brahmi)
Bacopa monnieri
Limited / mixed evidenceA creeping wetland herb used in Ayurvedic tradition and commonly called brahmi, taken as a supplement for memory and focus.
Herbs & BotanicalsTraditional AsianStress/AnxietyOtherRead full entryClose entry
Bacopa (Brahmi)
Bacopa monnieri
Part used or form
Dried whole plant or leaf extract
How it is used
By mouth
Also called
Brahmi · Water hyssop
Traditional / historical use
- Memory and mental clarity ('medhya rasayana')
- Anxiety and nervous complaints
- Epilepsy in traditional practice
Historical use is not evidence that it works.
What has been studied
- Memory and cognitive performance
- Attention in adults
Current evidence label
Limited / mixed evidence
Several small trials suggest bacopa extract may modestly improve some memory measures with regular use over weeks, but studies vary in quality, dose form, and what they measured, so results should be read cautiously.
Safety
Short-term use is generally described as tolerable, with stomach upset, nausea, dry mouth or fatigue as the more common complaints.
Avoid or use caution
- Thyroid conditions
- Slow heart rate
- Digestive ulcers
Medicine interactions
- May add to the effect of sedatives
- May affect thyroid hormone levels
- May affect medicines that slow heart rate
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally the fresh or dried plant was made into a paste, juice, or simmered decoction taken as part of a daily Ayurvedic regimen.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep
Related remedies
Bananas
Musa acuminata / Musa x paradisiaca
Some evidenceA widely eaten fruit notable for its potassium and easily digested carbohydrate content.
Foods & Kitchen RemediesTraditional AsianOther Traditional SystemsTraditional African / African DiasporaDigestionNauseaHeart/CirculationGeneral NutritionRead full entryClose entry
Bananas
Musa acuminata / Musa x paradisiaca
Part used or form
Whole ripe fruit
How it is used
By mouth
Also called
Banana · Plantain (cooking relative)
Traditional / historical use
- Everyday eating
- A soft first food for infants
- Traditional bland-diet food during stomach upset
Historical use is not evidence that it works.
What has been studied
- Potassium intake as part of overall diet
- Use as a bland, easily tolerated food during diarrhea or nausea
Current evidence label
Some evidence
Bananas are a reliable source of dietary potassium, a mineral linked to healthy blood pressure as part of an overall diet pattern, and are commonly recommended by clinicians as a gentle food during stomach upset because they are easy to digest — not because they treat any specific illness.
Safety
Safe as food for almost everyone. The main caution is for people who must limit dietary potassium, such as some people with advanced kidney disease.
Avoid or use caution
- Advanced chronic kidney disease or other conditions requiring a potassium-restricted diet
Medicine interactions
- People on potassium-restricted diets, or taking medicines that raise potassium (such as some blood pressure medicines or potassium-sparing diuretics), should ask a clinician or dietitian about how much high-potassium fruit fits their plan
Children
A very common and easy first fruit for infants once solids are introduced; mash or slice thinly for younger children to reduce choking risk.
Pregnancy and breastfeeding
Ordinary food during pregnancy with no established restriction; its potassium content is part of normal healthy eating.
How it was traditionally prepared
Eaten raw and ripe, mashed for infants, or cooked (as with plantains) in savory dishes.
Sources and further reading
- Potassium — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Chronic kidney disease — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular · Metabolic
Related remedies
Baobab
Adansonia digitata
Traditional use — evidence not establishedThe tart, powdery pulp of the African baobab tree's fruit, eaten as food and folk remedy across the Sahel for generations and now sold internationally as a powder.
Foods & Kitchen RemediesTraditional African / African DiasporaDigestionGeneral NutritionRead full entryClose entry
Baobab
Adansonia digitata
Part used or form
Dried fruit pulp, made into a powder
How it is used
By mouth
Also called
Monkey bread tree fruit · Adansonia
Traditional / historical use
- Everyday food and thirst-quenching drink mixed with water or milk
- Upset stomach and diarrhoea
- Fevers
- General nourishment during lean seasons
Historical use is not evidence that it works.
What has been studied
- Vitamin C and antioxidant content
- Effects on blood sugar response to meals
- Fiber and gut effects
Current evidence label
Traditional use — evidence not established
Baobab pulp is nutrient-dense, particularly in vitamin C and fiber, and early laboratory and small human studies have looked at its antioxidant content and effect on post-meal blood sugar. This is a much smaller and less consistent body of research than exists for common foods, so no health claim is established.
Safety
Baobab fruit is widely eaten as a food and is generally considered safe in food amounts. It has been approved as a food ingredient in some Western markets, but concentrated supplement extracts have not been studied as thoroughly as the whole fruit.
Avoid or use caution
- High-fiber intake may need to be introduced gradually if it causes bloating or loose stools
Medicine interactions
- Little formal drug-interaction research exists; treat concentrated extracts with the same caution as any new supplement
Children
Baobab pulp is eaten as a food by children in the regions where it grows; concentrated supplement powders are not a children's remedy without a doctor's advice.
Pregnancy and breastfeeding
Food-amount use is common in traditional diets; treat concentrated supplement forms with the same caution as any new supplement. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
Historical and cultural background
Baobab has been a staple wild food and household remedy across West, East and Southern Africa for centuries, with documented traditional uses recorded across many ethnic groups; long use in these communities reflects its place as a dietary staple, not proof that it treats disease.
How it was traditionally prepared
Traditionally the dried, powdery pulp was scraped from the hard shell and stirred into water, milk or porridge; the leaves and seeds have separate traditional food and medicinal uses.
Sources and further reading
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Antioxidants — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Immune / general wellness
Related remedies
Barberry
Berberis vulgaris
Traditional use — evidence not establishedA thorny shrub whose bitter root bark, rich in berberine, has been used across several traditional medicine systems, while its tart red berries have been used as food and flavoring.
Herbs & BotanicalsTraditional European / AmericanOther Traditional SystemsDigestionSkinRead full entryClose entry
Barberry
Berberis vulgaris
Part used or form
Dried root bark or berries
How it is used
By mouth
Also called
Berberis
Traditional / historical use
- Digestive complaints
- Skin conditions
- Liver and gallbladder complaints in folk use
Historical use is not evidence that it works.
What has been studied
- Effects tied largely to its berberine content, described in the separate Berberine entry
Current evidence label
Traditional use — evidence not established
Barberry itself has not been well studied as a whole herb; most research interest is in its berberine content, covered separately.
Safety
Root bark preparations are stronger and less well studied for safety than the berries; berberine-containing plants are generally not advised for infants because of a risk linked to newborn jaundice (bilirubin).
Avoid or use caution
- Pregnancy
- Infants and young children
- Liver disease
Medicine interactions
- Shares the interaction concerns of berberine, including with blood pressure, blood sugar and blood-thinning medicines
Children
Not for infants or young children; berberine-type compounds have been linked to a serious newborn risk. Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Root bark was traditionally simmered into a decoction; berries were dried, made into preserves, or used to add tartness to dishes.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Barley
Hordeum vulgare
Some evidenceAn ancient whole grain, a staple in soups and stews across Europe and the Middle East, valued today mainly for its soluble fiber.
Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianDigestionHeart/CirculationMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Barley
Hordeum vulgare
Part used or form
Whole grain — cooked as a side, in soups, or milled into flour
How it is used
By mouth
Also called
Pearl barley · Hulled barley
Traditional / historical use
- Soups and stews
- Bread and porridge in older European diets
- Traditional convalescent food
Historical use is not evidence that it works.
What has been studied
- Blood cholesterol
- Blood sugar response after meals
- Regularity
Current evidence label
Some evidence
Barley is rich in a soluble fiber called beta-glucan, and whole grains high in soluble fiber are linked by health agencies to lower LDL cholesterol and steadier blood sugar when they are part of the regular diet.
Safety
Very low risk as food. Barley contains gluten, so it is not suitable for people with celiac disease or a gluten intolerance. Adding a lot of fiber quickly can cause gas or bloating.
Avoid or use caution
- Celiac disease or gluten sensitivity — barley contains gluten
- Increase fiber gradually with enough fluids to avoid bloating
Children
Cooked barley is an ordinary grain food for children without celiac disease or gluten intolerance.
Pregnancy and breastfeeding
Ordinary whole-grain food.
How it was traditionally prepared
Simmered whole or pearled in soups and stews, cooked as a porridge, or ground into flour for bread.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- How to lower cholesterol with diet — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Carbohydrates — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular · Metabolic
Related remedies
Barrier Ointment Care for Dry or Cracked Skin
Some evidenceA general skin-care approach — using a thick, occlusive ointment over damp skin — for very dry, cracked, or chapped skin such as heels, hands, or lips, described as a practice rather than a single product.
Topical / SkinTraditional European / AmericanSkinRead full entryClose entry
Barrier Ointment Care for Dry or Cracked Skin
Part used or form
Thick, occlusive ointments (such as plain petrolatum-type products) applied over damp skin
How it is used
On the skin
Also called
Occlusive moisturizer routine · Petrolatum-based barrier care
Traditional / historical use
- Chapped hands and lips in cold, dry weather
- Cracked heels
- Sealing in moisture after bathing
Historical use is not evidence that it works.
What has been studied
- Skin barrier repair with occlusive moisturizers (well established in dermatology practice)
Current evidence label
Some evidence
Applying a thick, occlusive ointment to damp skin is a well-established, evidence-based approach in dermatology for supporting the skin barrier and reducing water loss in dry or cracked skin, though it manages symptoms rather than curing an underlying skin condition.
Safety
Plain occlusive ointments are generally very well tolerated. Fragranced or ingredient-heavy products are more likely to irritate already-cracked skin. Deep cracks that bleed, or skin that looks infected, should be checked by a clinician.
Avoid or use caution
- Known allergy to a specific product's ingredients
- Signs of skin infection — get medical evaluation instead of home care alone
Children
Plain, fragrance-free ointments are commonly used on children's dry or chapped skin; check with a pediatrician if cracking is severe or not improving.
Pregnancy and breastfeeding
Plain occlusive moisturizers are generally considered safe in pregnancy.
How it was traditionally prepared
Thick petroleum-jelly-type and lanolin-type ointments have been used since the 19th century as simple, effective barrier moisturizers, typically applied right after washing while skin is still damp.
Sources and further reading
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Wounds and injuries — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Related remedies
Bay Leaf
Laurus nobilis
Traditional use — evidence not establishedThe dried leaf of a Mediterranean evergreen tree, simmered whole in soups and stews for flavor and traditionally used for digestive complaints.
Herbs & BotanicalsTraditional European / AmericanOther Traditional SystemsDigestionRead full entryClose entry
Bay Leaf
Laurus nobilis
Part used or form
Dried whole leaf
How it is used
By mouth
Also called
Bay laurel · Laurel leaf
Traditional / historical use
- Digestive discomfort
- Flavoring for soups, stews and braises
- Traditional remedy for mild aches
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Bay leaf is a well-documented culinary herb with a traditional digestive-aid reputation, but modern clinical research on it is essentially absent.
Safety
Whole bay leaves are safe to cook with but are stiff and do not soften; they are a choking and throat-scratch hazard if swallowed whole, so they are always removed before serving.
Avoid or use caution
- Swallowing a whole leaf
- Diabetes medicines, due to a possible additive blood-sugar effect
Medicine interactions
- May add to the effect of blood sugar–lowering medicines
Children
Always remove whole bay leaves from a dish before serving to children, to avoid a choking or throat injury.
Pregnancy and breastfeeding
Ordinary culinary use in cooked dishes, with the leaf removed before eating, is common.
How it was traditionally prepared
A whole dried leaf added to simmering soups, stews and rice, and removed before the dish is served.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Bee Pollen
Traditional use — evidence not establishedPollen granules gathered by worker bees and collected from hives, sold as a nutritional supplement said to boost energy and immunity.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsHigh caution — do not self-treatGeneral NutritionRead full entryClose entry
Bee Pollen
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Can trigger severe allergic reactions, including anaphylaxis
Part used or form
Granules collected from beehives
How it is used
By mouth
Also called
Bee bread
Traditional / historical use
- General tonic for energy and vitality
- Allergy relief in folk use
Historical use is not evidence that it works.
What has been studied
- Nutritional supplementation
- Antioxidant activity
- Menopausal symptoms
Current evidence label
Traditional use — evidence not established
Bee pollen contains various nutrients, but good-quality human studies proving specific health benefits are lacking.
Safety
Bee pollen can cause serious allergic reactions, including anaphylaxis, especially in people allergic to bee stings, pollen or plants like ragweed.
Avoid or use caution
- Allergy to bee stings, pollen, or ragweed-family plants
- Asthma
Medicine interactions
- May add to the effect of blood-thinning medicines
Children
Honey-bee products including bee pollen carry an allergy risk; ask the child's doctor first. Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Collected directly from hive traps and traditionally eaten as granules or stirred into honey or food.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Dietary supplements — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Immune / general wellness
Related remedies
Beetroot
Beta vulgaris
Limited / mixed evidenceA deep red root vegetable long eaten as food across Europe and beyond, now also sold as a juice or powder marketed for blood pressure and exercise performance.
Foods & Kitchen RemediesTraditional European / AmericanHeart/CirculationGeneral NutritionRead full entryClose entry
Beetroot
Beta vulgaris
Part used or form
Root, eaten or juiced
How it is used
By mouth
Also called
Beet · Beet juice
Traditional / historical use
- Everyday food and folk 'blood builder'
- Liver support in folk use
Historical use is not evidence that it works.
What has been studied
- Blood pressure
- Exercise performance and endurance
Current evidence label
Limited / mixed evidence
Beetroot is naturally high in dietary nitrates, and some studies find modest, short-term drops in blood pressure or small exercise-performance benefits with beet juice, but effects vary between people and studies.
Safety
Eating beets or drinking beet juice is safe for most people as a food. It commonly turns urine or stool pink or red (beeturia), which is harmless but can be mistaken for blood.
Avoid or use caution
- Kidney stones (oxalate type)
- Low blood pressure
Medicine interactions
- May add to the effect of blood pressure medicines
- High oxalate content may matter for people prone to kidney stones
Children
Beetroot as a food is fine for most children; juice concentrates and supplements are not necessary for children. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
Pregnancy and breastfeeding
Beets as food are commonly eaten in pregnancy; large amounts of concentrated juice or supplements should be discussed with a provider. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally boiled, roasted or pickled as a root vegetable, or pressed into juice.
Sources and further reading
- High blood pressure — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Antioxidants — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular
Berberine
Some evidenceA bitter yellow plant compound found in several traditional medicine herbs, sold on its own as a supplement mostly for blood sugar and cholesterol.
Herbs & BotanicalsTraditional AsianOther Traditional SystemsHigh caution — do not self-treatMetabolic/Blood SugarDigestionRead full entryClose entry
Berberine
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Unsafe for infants and newborns — linked to a serious jaundice-related risk
Part used or form
Compound extracted from plants such as goldenseal, barberry and Oregon grape
How it is used
By mouth
Traditional / historical use
- Digestive infections in traditional systems
- Eye and skin complaints as a plant extract
Historical use is not evidence that it works.
What has been studied
- Blood sugar control
- Cholesterol levels
- Metabolic syndrome
Current evidence label
Some evidence
A number of clinical trials, mostly from outside the US, suggest berberine can modestly lower blood sugar and cholesterol, with effects sometimes compared to certain diabetes medicines, though study quality varies and it should not replace prescribed treatment.
Safety
Digestive upset such as diarrhea, cramping or constipation is the most common complaint. It is not safe for infants or during pregnancy because of a risk to newborns from displacing bilirubin.
Avoid or use caution
- Pregnancy and breastfeeding
- Infants and young children
- People on multiple prescription medicines
Medicine interactions
- May add to the effect of diabetes medicines, raising the risk of low blood sugar
- Affects liver enzymes that process many prescription drugs
- May add to the effect of blood pressure medicines
Children
Not for infants, and not a children's supplement generally. Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding because of documented newborn risk. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Historically taken as part of whole-plant preparations like goldenseal or barberry root decoctions rather than as an isolated compound.
Sources and further reading
- Berberine — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Diabetes — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Cholesterol — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
Berries (Mixed)
Limited / mixed evidenceA general term for eating a variety of berries together; grouped here because most of the evidence on berries and antioxidants applies to the group, not just one type.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsHeart/CirculationGeneral NutritionRead full entryClose entry
Berries (Mixed)
Part used or form
Fresh or frozen fruit — strawberries, raspberries, blackberries, and others eaten together
How it is used
By mouth
Also called
Mixed berries · Berry medley
Traditional / historical use
- Traditional foraged and cultivated fruit across many food cultures
- Preserves and jams
Historical use is not evidence that it works.
What has been studied
- Antioxidant intake
- Cardiovascular and metabolic health as part of an overall fruit-rich diet
Current evidence label
Limited / mixed evidence
Berries are among the richest ordinary foods in antioxidant plant compounds. NIH sources note that antioxidant-rich diets are linked to better health outcomes in observational studies, but that does not prove any single fruit prevents or treats disease, and concentrated antioxidant supplements have not shown the same benefit as eating the whole food.
Safety
Very low risk as food for most people. Frozen and unwashed fresh berries have occasionally been linked to foodborne illness outbreaks, so washing fresh berries and buying frozen berries from reputable sources matters.
Avoid or use caution
- Wash fresh berries before eating
- Berry allergy is possible though less common than nut allergy
Children
Ordinary food for children; cut larger berries for toddlers to reduce choking risk.
Pregnancy and breastfeeding
Ordinary food; wash fresh berries well as part of general food-safety practice in pregnancy.
How it was traditionally prepared
Eaten fresh, frozen and thawed, stewed, or preserved as jam.
Sources and further reading
- Antioxidants — in depth — NIH NCCIHU.S. federal health source
- Antioxidants — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Metabolic · Immune / general wellness
Related remedies
Bilberry
Vaccinium myrtillus
Limited / mixed evidenceA small dark berry related to the blueberry, long eaten in northern Europe and later promoted for eyesight.
Herbs & BotanicalsTraditional European / AmericanDigestionSore ThroatHeart/CirculationMetabolic/Blood SugarRead full entryClose entry
Bilberry
Vaccinium myrtillus
Part used or form
Fruit and leaf
Also called
European blueberry · Whortleberry
Traditional / historical use
- Diarrhoea
- Mouth and throat irritation
- Eye complaints
Historical use is not evidence that it works.
What has been studied
- Night vision and eye health
- Blood sugar
- Circulation
Current evidence label
Limited / mixed evidence
The popular belief that bilberry improves night vision has not held up in controlled studies. Other uses have too little evidence to judge.
Safety
The fruit is a food and is generally safe. High-dose leaf preparations over long periods are not considered safe.
Avoid or use caution
- Blood-thinner use
- Diabetes
Medicine interactions
- May add to the effect of blood thinners
- May affect blood sugar
Children
The berry is a food; supplements are not a children's remedy.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Eaten fresh or dried, brewed as a tea from fruit or leaves, made into jam.
Sources and further reading
- Bilberry — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Respiratory · Cardiovascular · Metabolic
Biofeedback
Some evidenceA training method that uses sensors to show a person real-time information about body signals like heart rate, muscle tension or skin temperature, helping them learn to consciously influence those signals, often alongside relaxation or breathing practice.
Mind-Body / Non-Drug PracticesTraditional European / AmericanStress/AnxietyPainHeart/CirculationRead full entryClose entry
Biofeedback
Part used or form
Sensors that display real-time body signals (such as heart rate or muscle tension) while a person practices relaxation techniques
How it is used
Whole-body practice — sensor-guided training sessions
Also called
Biofeedback training · Neurofeedback (a specific type)
Traditional / historical use
No documented traditional use recorded here.
Historical use is not evidence that it works.
What has been studied
- Tension and migraine headache
- Chronic pain
- Anxiety
- High blood pressure (adjunct)
- Incontinence (specific pelvic-floor biofeedback)
Current evidence label
Some evidence
There is no dedicated NCCIH page on biofeedback overall, though NCCIH's chronic pain research review discusses it. Biofeedback has reasonably good evidence for tension and migraine headache and for certain conditions like pelvic-floor dysfunction, with more mixed evidence for broader uses such as generalized anxiety or blood pressure control.
Safety
Very low risk since it involves only external sensors and no medication or invasive procedure. Occasionally people feel frustrated if progress is slow.
Avoid or use caution
- Not a substitute for evaluation of a new or worsening symptom
- Work with a trained provider for pelvic-floor or clinical biofeedback rather than unsupervised consumer devices for medical conditions
Children
Used safely with children, for example for headache or elimination-related concerns, under trained clinician guidance.
Pregnancy and breastfeeding
Generally considered safe as a non-invasive relaxation and self-regulation tool.
How it was traditionally prepared
Developed from physiological research in the 1960s and 1970s using early electronic monitoring equipment; modern versions use computers and simple sensors.
Sources and further reading
- Mind and body approaches for chronic pain — research review — NIH NCCIHU.S. federal health source
- Anxiety — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Chronic pain — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Cardiovascular
Related remedies
Birch Leaf
Betula pendula / Betula pubescens
Traditional use — evidence not establishedThe leaf of the common European birch tree, traditionally brewed as a mild diuretic tea said to 'flush' the urinary tract, distinct from birch bark tar and oil products used on skin.
Herbs & BotanicalsTraditional European / AmericanUrinaryOtherRead full entryClose entry
Birch Leaf
Betula pendula / Betula pubescens
Part used or form
Dried leaf (bark used topically and for tar/oil in the past)
How it is used
By mouth
Also called
Betula · White birch · Birch bark
Traditional / historical use
- Mild fluid retention ('flushing' teas)
- Joint discomfort (folk use)
- Traditional spring tonic use
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Birch leaf tea is a long-standing European folk diuretic, but there is little modern clinical research confirming any specific benefit.
Safety
Occasional birch leaf tea is generally considered low risk for most healthy adults, though its diuretic effect means it should be used cautiously by anyone on medicines that affect fluid or salt balance. Birch bark extracts and essential oil are a different, more concentrated product not covered by this leaf-tea entry.
Avoid or use caution
- Kidney or heart conditions affecting fluid balance
- Diuretic medicines
- Allergy to birch pollen (oral allergy syndrome)
Medicine interactions
- May add to the effect of diuretic ('water pill') medicines
- May affect lithium and other medicines cleared through fluid balance
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh or dried leaves were traditionally steeped as a tea, sometimes as part of a seasonal 'cleansing' regimen.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal medicinal products — European monographs and assessments — European Medicines AgencyInternational government / WHO / EMA
Links last checked 2026-09-14
Bitter Orange
Citrus aurantium
Safety concernThe sour orange used in marmalade and traditional Chinese medicine, now widely added to weight-loss and energy products after ephedra was banned.
Herbs & BotanicalsTraditional AsianTraditional European / AmericanHigh caution — do not self-treatDigestionNauseaCough/ColdMetabolic/Blood SugarRead full entryClose entry
Bitter Orange
Citrus aurantium
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
Part used or form
Peel and unripe fruit
Also called
Seville orange · Zhi shi · Synephrine source
Traditional / historical use
- Indigestion
- Nausea
- Appetite
Historical use is not evidence that it works.
What has been studied
- Weight loss
- Athletic performance
- Nasal congestion
Current evidence label
Safety concern
There is little good evidence that bitter orange products help with weight loss, and its main active compound acts on the body somewhat like ephedra.
Safety
Bitter orange supplements have been linked to raised blood pressure and heart rate, and to reports of serious heart events, especially when combined with caffeine.
Avoid or use caution
- Heart disease, irregular heartbeat or high blood pressure
- Stimulant or energy products
- Before surgery
Medicine interactions
- Combined with caffeine or stimulants, may raise heart rate and blood pressure
- Bitter orange juice/peel can affect how the body handles some medicines, similar to grapefruit
- Should not be combined with MAOI antidepressants
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Avoid supplement forms. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
The dried peel has long been used in cooking and in Chinese herbal formulas; concentrated extracts in pills are a modern invention.
Sources and further reading
- Bitter orange — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Dietary supplements — regulation and safety — U.S. Food and Drug AdministrationU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Respiratory · Metabolic
Black Beans
Phaseolus vulgaris
Some evidenceA staple pulse across Latin American and Caribbean cooking, discussed in nutrition guidance as a fiber- and protein-rich plant food.
Foods & Kitchen RemediesOther Traditional SystemsTraditional European / AmericanDigestionMetabolic/Blood SugarHeart/CirculationGeneral NutritionRead full entryClose entry
Black Beans
Phaseolus vulgaris
Part used or form
Dried or canned seed (legume), cooked
How it is used
By mouth
Also called
Turtle beans · Frijoles negros
Traditional / historical use
- Everyday staple food in Latin American, Caribbean and Southern U.S. cooking
Historical use is not evidence that it works.
What has been studied
- Fiber intake and digestive regularity
- Blood cholesterol and blood sugar as part of an overall diet pattern
Current evidence label
Some evidence
As with other legumes, general nutrition guidance associates diets higher in beans with better fiber intake and more favorable cholesterol and blood sugar markers. This reflects overall dietary pattern, not black beans acting as a standalone treatment.
Safety
Very low risk as food. Dried raw kidney-type beans (a relative of black beans) can contain a natural toxin destroyed by thorough cooking, so dried beans should always be fully cooked, never eaten raw or undercooked.
Avoid or use caution
- Dried beans must be soaked and boiled thoroughly, never eaten raw or undercooked
- Increase legume intake gradually to reduce gas and bloating
Children
Well-cooked, mashed beans are appropriate for young children; always ensure beans are fully cooked and soft.
Pregnancy and breastfeeding
A nutritious plant protein and fiber source during pregnancy as part of a balanced diet; no special restriction described in general nutrition guidance.
How it was traditionally prepared
Soaked and simmered whole in stews, soups and rice dishes, or mashed and refried.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Foodborne illness — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular · Metabolic
Related remedies
Black Cohosh
Actaea racemosa
Limited / mixed evidenceA North American woodland plant used by Native peoples and later by settlers, now sold mainly for menopause symptoms.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningSleepCough/ColdPainInflammationMenstrual/MenopauseRead full entryClose entry
Black Cohosh
Actaea racemosa
Part used or form
Root and rhizome
Also called
Black snakeroot · Macrotys · Rattleweed
Traditional / historical use
- Menstrual and childbirth complaints
- Joint pain
- Coughs
Historical use is not evidence that it works.
What has been studied
- Hot flashes and menopause symptoms
- Sleep during menopause
Current evidence label
Limited / mixed evidence
Studies of black cohosh for hot flashes have given mixed results, and the better-quality trials have generally not shown a clear benefit.
Safety
Usually mild side effects such as stomach upset or headache, but liver injury has been reported in people taking black cohosh products, though a direct cause has not been proven.
Avoid or use caution
- Liver disease
- History of breast cancer or hormone-sensitive conditions — ask an oncologist
- Stop and seek care for yellowing skin, dark urine or unusual tiredness
Medicine interactions
- May add to the effect of medicines processed by the liver
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
The dried root was traditionally simmered as a decoction or tinctured in alcohol.
Sources and further reading
- Black cohosh — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory · Nervous system / sleep · Musculoskeletal / pain · Reproductive / menstrual / menopause
Black Pepper
Piper nigrum
Limited / mixed evidenceThe world's most traded spice, made from the dried fruit of a South Asian vine, used daily as a seasoning and long featured in Ayurvedic and traditional Chinese practice.
Foods & Kitchen RemediesTraditional AsianDigestionCough/ColdRead full entryClose entry
Black Pepper
Piper nigrum
Part used or form
Dried, ground or whole peppercorns
How it is used
By mouth
Also called
Peppercorn · Piperine
Traditional / historical use
- Digestive discomfort
- Traditional remedy for cough and cold symptoms combined with honey
- General seasoning
Historical use is not evidence that it works.
What has been studied
- Piperine's effect on the absorption of other compounds, such as curcumin, studied in small trials
Current evidence label
Limited / mixed evidence
Piperine, black pepper's pungent compound, has been studied for how it changes the absorption of some other substances, but there is not strong clinical evidence that black pepper itself treats any condition.
Safety
Ordinary amounts used to season food are considered safe for most people. Concentrated piperine supplements can increase the levels of some medicines in the body.
Avoid or use caution
- Concentrated piperine supplements alongside prescription medicines, without medical advice
Medicine interactions
- Can increase blood levels of some prescription medicines by slowing how the liver breaks them down
Children
Ordinary seasoning is fine; concentrated piperine supplements are not advised for children without medical guidance.
Pregnancy and breastfeeding
Ordinary culinary use is common. Concentrated supplements are not advised. Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract.
How it was traditionally prepared
Dried peppercorns ground fresh or used whole in cooking, and traditionally mixed with honey for a sore throat.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Respiratory
Related remedies
Black Seed
Nigella sativa
Limited / mixed evidenceSmall black seeds used for centuries in Middle Eastern, South Asian and North African cooking and traditional medicine, now sold as an oil and capsule supplement.
Herbs & BotanicalsTraditional AsianOther Traditional SystemsSerious safety warningMetabolic/Blood SugarDigestionCough/ColdRead full entryClose entry
Black Seed
Nigella sativa
Part used or form
Seeds and pressed seed oil
How it is used
By mouth
Also called
Nigella sativa · Black cumin · Kalonji
Traditional / historical use
- Digestive complaints
- Respiratory and cough remedies
- General wellness tonic
Historical use is not evidence that it works.
What has been studied
- Blood sugar
- Blood pressure
- Cholesterol
- Allergic rhinitis
Current evidence label
Limited / mixed evidence
Small clinical trials suggest possible modest effects on blood sugar, blood pressure and cholesterol, but studies are limited in size and quality, so results should be read as preliminary rather than proven.
Safety
Culinary amounts in food are considered safe. Concentrated seed oil or extract supplements can cause stomach upset or allergic reaction in some people, and safety with long-term supplement use is less established.
Avoid or use caution
- Low blood pressure
- Bleeding disorders
- Planned surgery
Medicine interactions
- May add to the effect of blood sugar-lowering medicines
- May add to the effect of blood pressure medicines
- May add to the effect of blood-thinning medicines
Children
Culinary use in cooking is common in many families; concentrated supplements are not established for children. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally the whole seeds were toasted and sprinkled on bread and dishes, or pressed for oil used in traditional remedies.
Sources and further reading
- Nigella sativa — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Diabetes — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Respiratory · Metabolic
Black Tea
Camellia sinensis
Limited / mixed evidenceThe most widely drunk tea in the world — oxidized Camellia sinensis leaves steeped into a robust, caffeinated everyday beverage, the base of chai and English-style tea.
Teas & InfusionsTraditional AsianTraditional European / AmericanOther Traditional SystemsSerious safety warningHeart/CirculationOtherRead full entryClose entry
Black Tea
Camellia sinensis
Part used or form
Fully oxidized tea leaves steeped in hot water
How it is used
By mouth
Also called
English breakfast tea · Ceylon tea · Chai base tea
Traditional / historical use
- Everyday beverage
- Morning alertness
- Social and hospitality drink
Historical use is not evidence that it works.
What has been studied
- Heart and blood vessel health (population studies)
- Alertness and attention (from caffeine)
Current evidence label
Limited / mixed evidence
Population studies link regular tea drinking with some heart-health associations, but these studies cannot prove cause and effect, and much of tea's alerting effect comes simply from its caffeine content.
Safety
Generally safe in ordinary amounts for most adults. Black tea contains meaningful caffeine, which affects sleep, anxiety and heart rate in sensitive people and adds up across multiple cups a day.
Avoid or use caution
- Caffeine sensitivity, anxiety, or heart rhythm conditions — limit intake
- Iron-deficiency anemia — avoid drinking tea with iron-rich meals
Medicine interactions
- Caffeine can interact with stimulant medicines and add to heart rate or blood pressure effects
- Tannins can reduce iron absorption from food
Children
Black tea contains caffeine and is not recommended as a regular drink for young children; strong tea in quantity can affect sleep and iron absorption in children.
Pregnancy and breastfeeding
Caffeine is generally advised to be limited in pregnancy; black tea's caffeine content counts toward that daily total.
How it was traditionally prepared
Leaves withered, rolled, fully oxidized and dried, then steeped in hot water, often with milk and sugar or spices for chai.
Sources and further reading
- Caffeine — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Cardiovascular
Related remedies
Bladderwrack
Fucus vesiculosus
Safety concernA brown seaweed washed up on North Atlantic and European shores, historically used as a natural source of iodine and folk remedy for the thyroid and weight.
Herbs & BotanicalsTraditional European / AmericanHigh caution — do not self-treatMetabolic/Blood SugarOtherRead full entryClose entry
Bladderwrack
Fucus vesiculosus
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Can disrupt thyroid function
- Heavy metal contamination has been reported in some seaweed products
Part used or form
Dried seaweed thallus
How it is used
By mouth
Also called
Sea kelp · Brown kelp seaweed · Sea wrack
Traditional / historical use
- Underactive thyroid or goiter (folk use)
- Weight management (folk use)
- Joint discomfort applied as a poultice
Historical use is not evidence that it works.
What has been studied
- Iodine content and thyroid function
Current evidence label
Safety concern
Bladderwrack is genuinely iodine-rich, and iodine is essential for normal thyroid function, but there is no reliable evidence that bladderwrack supplements safely treat a thyroid condition or promote weight loss, and seaweed iodine content varies widely and unpredictably between products.
Safety
Because iodine content varies so much between batches, bladderwrack supplements can deliver far more iodine than intended, which can trigger or worsen thyroid problems in either direction. It may also absorb heavy metals such as arsenic from seawater.
Avoid or use caution
- Any thyroid condition
- Iodine allergy or sensitivity
- Kidney disease
Medicine interactions
- May interfere with thyroid medicines
- May add to the effect of blood-thinning medicines
- May interact with blood pressure medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding; excess iodine can affect a baby's thyroid. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried seaweed was traditionally steeped as a tea, powdered into capsules, or applied as a topical poultice for joints.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Thyroid diseases — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- LiverTox — herbal and dietary supplements section — NIH NIDDK / NCBI BookshelfU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Metabolic
Blessed Thistle
Cnicus benedictus
Traditional use — evidence not establishedA prickly, bitter herb long used in European folk medicine as a digestive bitter and traditionally believed to support breastfeeding.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningDigestionRead full entryClose entry
Blessed Thistle
Cnicus benedictus
Part used or form
Dried aerial parts (leaf and flower)
How it is used
By mouth
Also called
Holy thistle
Traditional / historical use
- Loss of appetite and indigestion
- Traditionally used to support milk supply while breastfeeding
- General bitter tonic
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
There is very little modern clinical research on blessed thistle; its traditional uses, including for breastfeeding, have not been confirmed in good-quality studies.
Safety
Generally considered to have a low toxicity profile in typical culinary/herbal-tea use, but it can irritate the stomach and cause allergic reactions, especially in people sensitive to ragweed-family plants.
Avoid or use caution
- Allergy to ragweed, daisies, or related plants
- Stomach ulcers
Medicine interactions
- May affect stomach acid, which matters with acid-reducing medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditionally used while breastfeeding, but this has not been confirmed by research; not advised during pregnancy itself. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally the dried leaf and flower were steeped as a bitter tea.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Blue Cohosh
Caulophyllum thalictroides
Safety concernA woodland plant that was historically used by some Indigenous communities and later by herbalists around childbirth, but modern reports of serious harm to newborns have made it a plant this library describes only as a documented risk, not a remedy to try.
Herbs & BotanicalsTraditional African / African DiasporaOther Traditional SystemsTraditional European / AmericanHigh caution — do not self-treatMenstrual/MenopauseRead full entryClose entry
Blue Cohosh
Caulophyllum thalictroides
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Linked to serious heart injury, stroke and other harm in newborns after maternal use near delivery
- Not established as safe or effective for any use
Part used or form
Dried root and rhizome
How it is used
By mouth
Also called
Papoose root · Squaw root
Traditional / historical use
- Historically used by some communities to attempt to bring on labor or ease menstrual complaints
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Safety concern
There are no good-quality studies showing blue cohosh is safe or effective for labor or any other use. Case reports instead describe serious harm to newborns when it was taken by the mother near the time of delivery.
Safety
Blue cohosh contains compounds that constrict blood vessels and have been linked to heart problems, strokes and organ injury in newborns whose mothers used it, as well as toxicity in adults who ingest the seeds or root.
Avoid or use caution
- Pregnancy at any stage
- Breastfeeding
- Heart conditions
Medicine interactions
- May add to the effect of blood pressure medicines and heart medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
This plant is not something to use in pregnancy for any reason, including to try to influence labor. Documented cases describe serious harm to newborns. Speak with an obstetric provider about labor concerns instead. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Historical accounts describe the dried root being simmered into a decoction, a use this library records as history, not as a technique to repeat.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- LiverTox — herbal and dietary supplements section — NIH NIDDK / NCBI BookshelfU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Reproductive / menstrual / menopause
Related remedies
Blueberries
Vaccinium corymbosum
Limited / mixed evidenceA North American native fruit, one of the most studied ordinary foods for antioxidant content, though claims about memory and disease prevention outrun the evidence.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsSerious safety warningHeart/CirculationGeneral NutritionRead full entryClose entry
Blueberries
Vaccinium corymbosum
Part used or form
Fresh or frozen berry, eaten whole
How it is used
By mouth
Also called
Wild blueberries
Traditional / historical use
- Wild-foraged and cultivated food by Indigenous peoples and settlers in North America
- Preserves and baking
Historical use is not evidence that it works.
What has been studied
- Antioxidant intake
- Blood vessel and blood pressure measures in small trials
- Memory in small trials
Current evidence label
Limited / mixed evidence
Blueberries are consistently high in antioxidant plant compounds, and small human trials have looked at effects on blood vessels, blood pressure, and memory with some promising but inconsistent results. NIH sources are clear that antioxidant-rich eating patterns are linked to health in observational research, which is weaker evidence than a proven treatment effect.
Safety
Very low risk as food. Occasional recalls for contamination affect fresh and frozen berries generally, so ordinary food-safety practice (washing, checking recalls) applies.
Avoid or use caution
- Wash fresh berries before eating
Children
Ordinary food for children; whole blueberries can be a choking hazard for infants and toddlers and are safer halved.
Pregnancy and breastfeeding
Ordinary food.
How it was traditionally prepared
Eaten fresh, frozen, dried, or cooked into preserves and baked goods.
Sources and further reading
- Antioxidants — in depth — NIH NCCIHU.S. federal health source
- Antioxidants — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Cardiovascular · Metabolic
Related remedies
Borage Seed Oil
Borago officinalis
Limited / mixed evidenceAn oil pressed from the seeds of the borage plant, valued as a source of gamma-linolenic acid (GLA) and sold as a supplement for skin and joint complaints, distinct from the borage leaf and flower, which contain liver-toxic compounds.
Oils & AromaticsTraditional European / AmericanHigh caution — do not self-treatSkinInflammationRead full entryClose entry
Borage Seed Oil
Borago officinalis
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Related plant parts (leaf and flower) contain liver-toxic pyrrolizidine alkaloids; oil quality is not consistently verified across brands
Part used or form
Cold-pressed seed oil (capsules or topical oil)
How it is used
By mouth
Also called
Starflower oil · Borago officinalis oil
Traditional / historical use
- Eczema and dry skin (folk and modern supplement use)
- Joint discomfort
Historical use is not evidence that it works.
What has been studied
- Eczema symptoms
- Rheumatoid arthritis joint symptoms (small trials)
Current evidence label
Limited / mixed evidence
Borage seed oil is a concentrated source of GLA, an omega-6 fatty acid studied in small trials for eczema and joint symptoms, with mixed and inconsistent results that stop short of proving benefit.
Safety
Properly processed borage seed oil is intended to have the liver-toxic pyrrolizidine alkaloids found in the leaf and flower removed, but not all commercial products are consistently tested, so quality varies. It is not the same product as borage leaf or flower preparations, which carry a documented liver-injury risk and are not covered as safe here.
Avoid or use caution
- Liver disease
- Bleeding disorders
- Seizure disorders
- Planned surgery
Medicine interactions
- May add to the effect of blood-thinning medicines
- May lower the seizure threshold with some seizure medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Modern seed oil is cold-pressed and sold in capsules or bottled oil; this is a newer product distinct from the traditional whole-plant infusions once made from the leaf and flower.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- LiverTox — herbal and dietary supplements section — NIH NIDDK / NCBI BookshelfU.S. federal health source
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Musculoskeletal / pain
Related remedies
Boswellia
Boswellia serrata
Limited / mixed evidenceThe fragrant resin known as frankincense, burned as incense for thousands of years and used in Ayurvedic practice for swelling and joint pain.
Herbs & BotanicalsTraditional AsianOther Traditional SystemsDigestionPainInflammationSkinRead full entryClose entry
Boswellia
Boswellia serrata
Part used or form
Gum resin from the tree trunk
Also called
Frankincense · Indian frankincense · Salai guggal
Traditional / historical use
- Joint pain and stiffness
- Inflammation
- Incense and ritual use
Historical use is not evidence that it works.
What has been studied
- Osteoarthritis
- Asthma
- Inflammatory bowel disease
Current evidence label
Limited / mixed evidence
Some small trials suggest boswellia may ease osteoarthritis pain, but the studies are limited in size and quality, so the finding is not settled.
Safety
Generally well tolerated; digestive upset and rash are reported.
Avoid or use caution
- Ask before use with autoimmune or immune-suppressing treatment
Medicine interactions
- May affect medicines processed by the liver
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Resin tears were burned as incense, chewed, or prepared as extracts in traditional formulas.
Sources and further reading
- Boswellia — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Skin · Musculoskeletal / pain
Brazil Nuts
Bertholletia excelsa
Limited / mixed evidenceA large tree nut native to the Amazon basin, notable in nutrition guidance for being an unusually concentrated dietary source of the mineral selenium.
Foods & Kitchen RemediesOther Traditional SystemsGeneral NutritionOtherRead full entryClose entry
Brazil Nuts
Bertholletia excelsa
Part used or form
Tree nut seed, whole or shelled
How it is used
By mouth
Traditional / historical use
- A regional food in Amazonian South America
- A modern snack food marketed for its selenium content
Historical use is not evidence that it works.
What has been studied
- Selenium intake and selenium status as part of an overall diet
Current evidence label
Limited / mixed evidence
Brazil nuts are a genuine and unusually concentrated food source of selenium, an essential trace mineral, but selenium content varies widely between individual nuts depending on the soil they grew in, so intake from Brazil nuts is not precisely predictable. There is no reliable evidence that eating them treats any condition.
Safety
Because selenium content per nut is highly variable and can be very high, regularly eating more than a small number of Brazil nuts risks selenium excess (selenosis), which can cause hair and nail changes, gastrointestinal upset, fatigue and, in severe or prolonged excess, nerve problems. Tree nut allergy also applies to Brazil nuts, and whole nuts are a choking hazard for young children.
Avoid or use caution
- Regularly eating many Brazil nuts, or combining them with a selenium supplement — risk of selenium excess
- Known tree nut allergy — avoid
- Whole nuts — choking hazard for infants and young children
Children
Whole Brazil nuts should not be given to infants and young children because of choking risk. Because of their concentrated and variable selenium content, they are not an appropriate everyday snack food for children to eat freely.
Pregnancy and breastfeeding
Occasional Brazil nuts are not inherently unsafe in pregnancy for people without a nut allergy, but because selenium content is unpredictable and excess selenium is a real concern, treating them as an everyday snack food is not advisable; a prenatal care provider can advise on overall selenium and supplement intake.
How it was traditionally prepared
Eaten raw or roasted as a whole nut, or chopped into baked goods and trail mixes.
Sources and further reading
- Minerals — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Food allergy — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Choking — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Breathing and Relaxation Techniques
Some evidenceSimple, free skills — slowing the breath, releasing muscle tension, picturing a calm scene — that can be used in the moment.
Mind-Body / Non-Drug PracticesTraditional AsianTraditional European / AmericanSleepStress/AnxietyPainMenstrual/MenopauseHeart/CirculationRead full entryClose entry
Breathing and Relaxation Techniques
Part used or form
Slow breathing, muscle relaxation or guided imagery, done anywhere
Also called
Deep breathing · Progressive muscle relaxation · Guided imagery · Box breathing
Traditional / historical use
- Calming nerves
- Sleep
- Pain and childbirth
- Prayer and chanting practices
Historical use is not evidence that it works.
What has been studied
- Anxiety
- Sleep
- Pain and procedure distress
- Blood pressure
- Headache
Current evidence label
Some evidence
Relaxation techniques have reasonable evidence for easing anxiety, some pain and procedure-related distress, and are widely used because the risk is so low.
Safety
Very low risk. A few people feel more anxious when focusing on breathing; forced or rapid breathing can cause light-headedness.
Avoid or use caution
- Stop if you feel dizzy and return to normal breathing
- Respiratory conditions — ask a clinician about breathing exercises
Children
Simple slow-breathing games are commonly taught to children and are generally safe.
Pregnancy and breastfeeding
Widely used in childbirth preparation; generally considered safe.
How it was traditionally prepared
Breath control appears in yogic pranayama and in chanting and prayer traditions worldwide.
Sources and further reading
- Relaxation techniques — what you need to know — NIH NCCIHU.S. federal health source
- Meditation and mindfulness — what the science says — NIH NCCIHU.S. federal health source
Related concerns
Body systems: Nervous system / sleep · Musculoskeletal / pain · Cardiovascular · Reproductive / menstrual / menopause
Breathing-Focused Body Scan
Some evidenceA specific mindfulness technique of slowly directing attention through different parts of the body while noticing the breath, distinct from the active breathing exercises and muscle-tensing relaxation techniques covered under general breathing-and-relaxation practice.
Mind-Body / Non-Drug PracticesTraditional AsianTraditional European / AmericanStress/AnxietySleepPainRead full entryClose entry
Breathing-Focused Body Scan
Part used or form
A guided practice of moving attention slowly through the body while breathing naturally, usually lying down
How it is used
Whole-body practice — usually done lying down with eyes closed
Also called
Body scan meditation · Mindful body scan
Traditional / historical use
- Component of Buddhist mindfulness meditation traditions
- Modern mindfulness-based stress reduction (MBSR) programs
Historical use is not evidence that it works.
What has been studied
- Stress and anxiety reduction
- Sleep onset
- Chronic pain coping (as part of mindfulness-based programs)
Current evidence label
Some evidence
The body scan is a core component of mindfulness-based stress reduction (MBSR) programs, which have reasonable evidence for easing stress, anxiety, and helping people cope with chronic pain; the body scan alone, apart from full MBSR, has less dedicated research of its own.
Safety
Very low physical risk. Lying still and turning attention inward can occasionally bring up difficult emotions or body sensations, particularly for people with trauma histories.
Avoid or use caution
- History of trauma or dissociation — consider practicing with a trained instructor first
- Stop if the practice increases distress
Children
Short, simplified body-scan exercises are used in some school-based mindfulness programs and are generally low risk.
Pregnancy and breastfeeding
Generally considered safe; use a comfortable side-lying position rather than lying flat on the back in later pregnancy.
How it was traditionally prepared
Rooted in Buddhist mindfulness meditation practices, the body scan was adapted into a standardized secular exercise as part of mindfulness-based stress reduction programs developed in the late 20th century.
Sources and further reading
- Meditation and mindfulness — what you need to know — NIH NCCIHU.S. federal health source
- Relaxation techniques — what you need to know — NIH NCCIHU.S. federal health source
- Pain — complementary approaches — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Musculoskeletal / pain
Brewer's Yeast
Saccharomyces cerevisiae
Traditional use — evidence not establishedA byproduct of beer brewing, dried and sold as a B-vitamin-rich food supplement and folk remedy for nutrition and milk supply.
Foods & Kitchen RemediesTraditional European / AmericanGeneral NutritionRead full entryClose entry
Brewer's Yeast
Saccharomyces cerevisiae
Part used or form
Dried yeast flakes or powder
How it is used
By mouth
Also called
Saccharomyces cerevisiae supplement
Traditional / historical use
- General nutritional supplement
- Supporting milk supply in nursing mothers (folk use)
- Skin and hair support (folk use)
Historical use is not evidence that it works.
What has been studied
- B-vitamin and chromium nutritional content
Current evidence label
Traditional use — evidence not established
Brewer's yeast is a genuine source of B vitamins, protein and trace minerals, but specific health claims made for it as a supplement (milk supply, skin, blood sugar) have not been established by reliable clinical trials.
Safety
Generally well tolerated as a food by most adults; some people get gas or bloating, and it should be avoided by anyone with a yeast allergy or sensitivity, or on certain interacting medicines.
Avoid or use caution
- MAOI antidepressant use
- Yeast allergy
- Crohn's disease (some report symptom flares)
Medicine interactions
- Contains tyramine, which can interact seriously with MAOI antidepressants
- May affect blood sugar in people on diabetes medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Spent brewing yeast was traditionally dried and sold as flakes or powder to be stirred into food or drink.
Sources and further reading
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary supplements — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Metabolic · Immune / general wellness
Broccoli Sprouts
Brassica oleracea (sprouted seed)
Limited / mixed evidenceYoung broccoli seedlings marketed for their concentrated sulforaphane content, a compound also present in mature cruciferous vegetables.
Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianSerious safety warningGeneral NutritionRead full entryClose entry
Broccoli Sprouts
Brassica oleracea (sprouted seed)
Part used or form
Young sprouted seedling, eaten raw or lightly cooked
How it is used
By mouth
Traditional / historical use
- A modern addition to salads and sandwiches, popularized for its concentrated nutrient content
Historical use is not evidence that it works.
What has been studied
- Sulforaphane and other cruciferous plant compounds, studied in early human and laboratory research
Current evidence label
Limited / mixed evidence
Cruciferous vegetables and their compounds, including sulforaphane found in broccoli sprouts, have been studied in early-stage human and laboratory research for various health outcomes, but this research has not established broccoli sprouts as an effective treatment for any disease, including cancer.
Safety
As a raw sprouted seed, broccoli sprouts carry the same food-safety concerns as other raw sprouts: they have been linked to bacterial outbreaks (such as Salmonella and E. coli) in the U.S. because warm, moist sprouting conditions can also favor bacterial growth.
Avoid or use caution
- Raw sprouts of any kind — higher food-poisoning risk; pregnant people, young children, older adults and anyone immunocompromised are usually advised to avoid raw sprouts or cook them thoroughly
Children
Raw sprouts are generally not recommended for young children because of the higher risk of foodborne illness; cooked sprouts reduce but do not eliminate this concern.
Pregnancy and breastfeeding
Raw sprouts, including broccoli sprouts, are commonly advised against during pregnancy because of a higher risk of bacterial foodborne illness; cooking them reduces this risk.
How it was traditionally prepared
Grown from seed for a few days and eaten raw as a garnish or salad topping, or added to cooked dishes.
Sources and further reading
- Foodborne illness — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Cancer — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Pregnancy and nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Immune / general wellness
Related remedies
Bromelain
Ananas comosus (enzyme extract)
Limited / mixed evidenceA group of enzymes from pineapple, used traditionally in Central and South America and sold today for swelling and digestion.
Herbs & BotanicalsOther Traditional SystemsSerious safety warningDigestionCough/ColdPainInflammationSkinRead full entryClose entry
Bromelain
Ananas comosus (enzyme extract)
Part used or form
Enzyme extracted from pineapple stem and fruit
Also called
Pineapple enzyme
Traditional / historical use
- Digestion
- Swelling and bruising
- Wound care
Historical use is not evidence that it works.
What has been studied
- Sinus inflammation
- Osteoarthritis
- Swelling after surgery or injury
- Burn wound cleaning
Current evidence label
Limited / mixed evidence
Bromelain has been studied for swelling, sinus symptoms and joint pain with mixed results; the evidence is not strong enough to call it effective.
Safety
Usually well tolerated. Can cause digestive upset, and allergic reactions are possible, particularly in people allergic to pineapple, latex, wheat or certain pollens.
Avoid or use caution
- Pineapple or latex allergy
- Blood-thinner use
- Before surgery
Medicine interactions
- May increase bleeding risk with blood thinners
- May increase absorption of some antibiotics
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Pineapple flesh and juice were used directly in traditional practice; purified enzyme powders and tablets are modern.
Sources and further reading
- Bromelain — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Respiratory · Skin · Musculoskeletal / pain
Brown Rice
Oryza sativa
Some evidenceA whole-grain form of rice that keeps the bran and germ layers, positioned in dietary guidance as a fiber-richer alternative to white rice.
Foods & Kitchen RemediesTraditional AsianOther Traditional SystemsDigestionMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Brown Rice
Oryza sativa
Part used or form
Whole grain (bran and germ intact), cooked
How it is used
By mouth
Also called
Whole-grain rice
Traditional / historical use
- A dietary staple across many Asian and global cuisines
Historical use is not evidence that it works.
What has been studied
- Fiber intake and blood sugar response compared with refined grains
Current evidence label
Some evidence
General nutrition guidance recommends choosing whole grains such as brown rice over refined grains because the intact bran and germ provide more fiber and can produce a gentler blood sugar rise, though rice itself is not a treatment for diabetes.
Safety
Very low risk as food for most people. Rice, including brown rice, can accumulate trace arsenic from soil and water; eating a variety of grains rather than relying on rice alone is a reasonable general precaution, particularly for infant feeding.
Avoid or use caution
- Vary grain choices rather than relying on rice as the only starch, especially for infants and young children
Children
Cooked, softened brown rice is a suitable food for children; a varied grain diet is reasonable to limit any one food's contribution to trace contaminants.
Pregnancy and breastfeeding
An ordinary, nutritious whole grain during pregnancy as part of a varied diet; no special restriction described in general nutrition guidance beyond eating a varied diet.
How it was traditionally prepared
Cooked by boiling or steaming, similarly to white rice but with a longer cooking time.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Carbohydrates — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
Buckwheat
Fagopyrum esculentum
Limited / mixed evidenceA gluten-free seed cooked and milled like a grain, used across Eastern European and East Asian cooking and valued in nutrition guidance for fiber and protein.
Foods & Kitchen RemediesTraditional AsianTraditional European / AmericanDigestionMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Buckwheat
Fagopyrum esculentum
Part used or form
Whole groat or flour, cooked or baked
How it is used
By mouth
Also called
Kasha · Soba flour grain
Traditional / historical use
- A staple grain-like food in Eastern European (kasha) and East Asian (soba noodles) cooking
Historical use is not evidence that it works.
What has been studied
- Fiber and protein intake as part of an overall diet
Current evidence label
Limited / mixed evidence
Buckwheat is a nutrient-dense whole-grain-like food, but evidence specific to buckwheat's effect on health outcomes is limited compared with more heavily studied whole grains; it fits within general whole-grain dietary guidance.
Safety
Very low risk as food and naturally gluten-free, though buckwheat is often processed on shared equipment with wheat, so people with celiac disease should check labeling. Buckwheat allergy, while uncommon, has been reported.
Avoid or use caution
- Check for cross-contact with wheat if avoiding gluten strictly
- Known buckwheat allergy
Children
A suitable grain alternative for children, including those avoiding gluten; cook until soft.
Pregnancy and breastfeeding
An ordinary, nutritious food during pregnancy; no special restriction described in general nutrition guidance.
How it was traditionally prepared
Roasted groats (kasha) simmered like rice, or milled into flour for noodles and pancakes.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Celiac disease — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Food allergy — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
Bulgur
Triticum spp.
Some evidenceA quick-cooking whole-grain wheat product, parboiled and cracked before drying, widely used in Middle Eastern and Mediterranean cooking and positioned in dietary guidance as a whole-grain alternative to refined grains.
Foods & Kitchen RemediesOther Traditional SystemsTraditional European / AmericanDigestionMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Bulgur
Triticum spp.
Part used or form
Parboiled, dried and cracked whole wheat grain, cooked
How it is used
By mouth
Also called
Bulgur wheat · Cracked wheat
Traditional / historical use
- A staple grain in Middle Eastern, Mediterranean and South Asian cooking, used in dishes such as tabbouleh and pilafs
Historical use is not evidence that it works.
What has been studied
- Fiber intake and blood sugar response compared with refined grains, as part of general whole-grain research
Current evidence label
Some evidence
Because bulgur retains the bran and germ of the wheat kernel, general dietary guidance groups it with other whole grains recommended in place of refined grains for their fiber content and generally gentler effect on blood sugar; there is no evidence specific to bulgur outperforming other whole grains.
Safety
Very low risk as food for most people without gluten-related conditions. Contains wheat and gluten.
Avoid or use caution
- Celiac disease, wheat allergy or gluten sensitivity — avoid
Children
A suitable whole-grain food for children without wheat allergy or celiac disease; cook until soft for younger children.
Pregnancy and breastfeeding
An ordinary, nutritious whole grain during pregnancy as part of a balanced diet; no special restriction described in general nutrition guidance.
How it was traditionally prepared
Made by parboiling, drying and cracking whole wheat kernels, then simmered briefly or soaked before eating, as in tabbouleh or pilaf.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Celiac disease — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Carbohydrates — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
Burdock
Arctium lappa
Traditional use — evidence not establishedA large-leaved plant whose long root is a common vegetable in East Asian cooking (gobo) and a long-standing folk remedy in Europe for skin conditions and as a 'blood purifier.'
Herbs & BotanicalsTraditional European / AmericanTraditional AsianSerious safety warningSkinDigestionRead full entryClose entry
Burdock
Arctium lappa
Part used or form
Root, eaten as a vegetable or dried for tea
How it is used
By mouth
Also called
Gobo · Burr
Traditional / historical use
- Skin conditions such as acne and eczema
- 'Blood purifying' tonic
- Digestive complaints
Historical use is not evidence that it works.
What has been studied
- Antioxidant effects
- Blood sugar
- Skin inflammation
Current evidence label
Traditional use — evidence not established
Burdock root is a nutritious vegetable, and lab studies show antioxidant activity, but human clinical trials supporting its traditional uses for skin or as a detox tonic are lacking.
Safety
Eating burdock root as a vegetable is considered safe. Wild-harvested burdock root has occasionally been mistaken for the toxic look-alike belladonna root, which has caused poisoning, so sourcing matters.
Avoid or use caution
- Foraged/wild-harvested root of uncertain identification
- Pregnancy (concentrated extracts)
Medicine interactions
- May add to the effect of diabetes medicines
- May add to the effect of diuretics
Children
Burdock root as a cooked vegetable is a food eaten by children in some cuisines; concentrated supplements are not established. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Some traditional sources describe it as stimulating the uterus.
How it was traditionally prepared
Traditionally the fresh root was peeled and simmered or stir-fried as a vegetable, or the dried root was steeped as tea.
Sources and further reading
- Burdock — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Skin
Related remedies
Butcher's Broom
Ruscus aculeatus
Limited / mixed evidenceA small spiny European shrub whose root has a long folk history for circulation problems in the legs, and is still sold as a supplement for vein health.
Herbs & BotanicalsTraditional European / AmericanHeart/CirculationRead full entryClose entry
Butcher's Broom
Ruscus aculeatus
Part used or form
Dried root/rhizome extract
How it is used
By mouth
Also called
Ruscus aculeatus · Knee holly
Traditional / historical use
- Varicose veins and 'heavy legs' (folk use)
- Hemorrhoids (folk use)
Historical use is not evidence that it works.
What has been studied
- Chronic venous insufficiency symptoms (small trials, often combined with other ingredients)
Current evidence label
Limited / mixed evidence
Small clinical trials, mostly of combination products containing butcher's broom, suggest possible modest improvement in leg swelling and heaviness linked to poor vein circulation, but the evidence for butcher's broom alone is limited.
Safety
Short-term use appears reasonably well tolerated by most adults, with nausea or stomach upset the most commonly reported issue.
Avoid or use caution
- High blood pressure
- Benign prostatic hyperplasia (theoretical interaction)
Medicine interactions
- May add to the effect of blood pressure medicines
- May add to the effect of decongestant-type medicines (theoretical, due to shared compounds)
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried root was traditionally decocted or powdered; modern products are standardized extracts, often combined with citrus flavonoids.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Varicose veins — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular
Related remedies
Butterbur
Petasites hybridus
Safety concernA large-leaved marsh plant used in Europe for pain and, more recently, studied for migraine and hay fever.
Herbs & BotanicalsTraditional European / AmericanHigh caution — do not self-treatCough/ColdPainRead full entryClose entry
Butterbur
Petasites hybridus
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
Part used or form
Root, rhizome and leaf
Also called
Blatterdock · Bog rhubarb · Petasites
Traditional / historical use
- Headache
- Fever
- Cough
- Stomach cramps
Historical use is not evidence that it works.
What has been studied
- Migraine prevention
- Hay fever (allergic rhinitis)
Current evidence label
Safety concern
Some studies suggested butterbur might help prevent migraine, but the safety of the products is the deciding issue: raw butterbur contains compounds that can damage the liver.
Safety
Raw butterbur contains pyrrolizidine alkaloids, which can harm the liver and are linked to cancer risk. Only products certified free of these compounds are considered for use, and liver injury reports have still occurred.
Avoid or use caution
- Never use raw or homemade butterbur preparations
- Liver disease
- Ragweed, marigold or daisy family allergy
Medicine interactions
- May add to the strain on the liver from other medicines and supplements
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
The root was historically boiled or tinctured in Europe; modern use relies on processed extracts.
Sources and further reading
- Butterbur — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory · Musculoskeletal / pain
Cabbage
Brassica oleracea var. capitata
Limited / mixed evidenceA cruciferous vegetable eaten worldwide, raw, cooked or fermented, and used traditionally as a topical wrap for breast engorgement in breastfeeding.
Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianOther Traditional SystemsDigestionGeneral NutritionRead full entryClose entry
Cabbage
Brassica oleracea var. capitata
Part used or form
Leafy head vegetable, raw or cooked, or fermented
How it is used
By mouth
Traditional / historical use
- An everyday vegetable in many cuisines
- Chilled cabbage leaves applied to the breasts for engorgement during breastfeeding
Historical use is not evidence that it works.
What has been studied
- Fiber intake as part of an overall diet
Current evidence label
Limited / mixed evidence
Cabbage as food fits within general vegetable and cruciferous-vegetable dietary guidance. The topical use of cool cabbage leaves for breast engorgement is a long-standing folk practice; some small studies suggest comfort similar to other cold compresses, but evidence that cabbage itself adds anything beyond cold is limited.
Safety
Very low risk as food for most people. When fermented into sauerkraut, sodium content rises.
Avoid or use caution
- Fermented cabbage products (sauerkraut) can be high in sodium
Children
An appropriate vegetable for children when cooked soft; raw, tough cabbage pieces may be hard for young children to chew safely.
Pregnancy and breastfeeding
An ordinary, nutritious vegetable during pregnancy; no special restriction described in general nutrition guidance.
How it was traditionally prepared
Eaten raw in slaws, cooked in soups and stir-fries, or fermented into sauerkraut or kimchi.
Sources and further reading
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Sodium — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Calendula
Calendula officinalis
Limited / mixed evidenceA bright orange garden flower long used in European folk medicine on cuts, minor burns and irritated skin.
Topical / SkinTraditional European / AmericanSkinInflammationRead full entryClose entry
Calendula
Calendula officinalis
Part used or form
Dried flower heads, used as oil, cream or salve
How it is used
On the skin
Also called
Pot marigold · Marigold
Traditional / historical use
- Minor cuts and scrapes
- Skin irritation and rashes
- Diaper rash in folk use
Historical use is not evidence that it works.
What has been studied
- Wound healing
- Radiation-related skin irritation
- Diaper dermatitis
Current evidence label
Limited / mixed evidence
Small clinical studies, including some in people receiving radiation therapy, suggest topical calendula preparations may help minor skin irritation and wound healing, but the body of research is limited.
Safety
Topical calendula is generally well tolerated; allergic skin reactions can occur, especially in people allergic to ragweed-family plants.
Avoid or use caution
- Allergy to ragweed, daisies, chrysanthemums or related plants
- Open, deep, or infected wounds without medical care
Children
Topical calendula preparations are commonly used on children's minor skin irritation in folk practice; check with a pediatrician for infants. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
Pregnancy and breastfeeding
Topical use is generally considered lower risk than oral use, which is not advised in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried petals were traditionally infused in oil or made into a salve or wash applied directly to the skin.
Sources and further reading
- Calendula — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Calendula (Topical)
Calendula officinalis
Limited / mixed evidenceMarigold flowers infused into oils, creams and ointments, traditionally rubbed on minor skin irritation and used in some clinics for skin care during radiation therapy.
Topical / SkinTraditional European / AmericanOther Traditional SystemsSkinRead full entryClose entry
Calendula (Topical)
Calendula officinalis
Part used or form
Flower-infused oil, cream or ointment applied to the skin
How it is used
On the skin
Also called
Pot marigold cream · Calendula ointment
Traditional / historical use
- Minor skin irritation
- Diaper rash
- Minor scrapes
- Chapped skin
Historical use is not evidence that it works.
What has been studied
- Skin reactions during radiation therapy
- Minor wound healing comfort
Current evidence label
Limited / mixed evidence
Small clinical studies, including some on radiation-related skin reactions, suggest calendula cream may be soothing, but the overall evidence base is small and not conclusive.
Safety
Topical calendula is generally well tolerated; allergic skin reactions can occur, especially in people allergic to ragweed and related plants.
Avoid or use caution
- Known allergy to ragweed, daisies, chrysanthemums or related plants
- Deep, dirty, large or infected wounds need medical care, not home topicals
Medicine interactions
- None well documented for topical use
Children
Calendula cream is commonly used on children's minor skin irritation and diaper rash; discontinue if a rash appears.
Pregnancy and breastfeeding
Topical use on intact skin is generally considered low risk; swallowed calendula preparations are a different matter and are not covered here.
How it was traditionally prepared
Dried flower heads infused into oil, then made into salves, creams or ointments.
Sources and further reading
- Calendula — Memorial Sloan Kettering — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Capsaicin Cream
Capsicum annuum / Capsicum frutescens
Some evidenceA cream made from the compound that makes chili peppers hot, rubbed on the skin over painful joints or nerves to create a warming, tingling counter-sensation.
Topical / SkinOther Traditional SystemsTraditional European / AmericanSerious safety warningPainRead full entryClose entry
Capsaicin Cream
Capsicum annuum / Capsicum frutescens
Part used or form
Cream, gel or patch made from chili pepper extract
How it is used
On the skin
Also called
Chili pepper cream · Capsaicin patch
Traditional / historical use
- Muscle and joint aches
- Nerve pain rubs in folk medicine
Historical use is not evidence that it works.
What has been studied
- Osteoarthritis pain
- Nerve pain (e.g., after shingles)
- Diabetic nerve pain
Current evidence label
Some evidence
Over-the-counter capsaicin creams and higher-strength prescription patches have been studied for joint and nerve pain, with modest benefit for some people, alongside a strong burning sensation on application.
Safety
Causes intense burning, stinging and redness at first use in most people; the sensation usually lessens with repeated use but can be severe with high-strength products.
Avoid or use caution
- Broken, irritated or sunburned skin
- Eyes, mouth, nose and genitals — wash hands thoroughly after use
- Do not use with a heating pad or after a hot shower — burns can result
Medicine interactions
- None well documented
Children
Not recommended for young children; capsaicin burns are painful and children may rub it into their eyes.
Pregnancy and breastfeeding
Limited safety data on topical use in pregnancy; ask a clinician before use.
How it was traditionally prepared
Historically, crushed chili applied in cloths or infused into fats and oils as a warming rub.
Sources and further reading
- Capsaicin — Memorial Sloan Kettering — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Sprains and strains — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Musculoskeletal / pain
Caraway
Carum carvi
Limited / mixed evidenceA small ridged seed used as a spice across European, Middle Eastern and South Asian cooking, and taken as a digestive remedy in folk tradition.
Herbs & BotanicalsTraditional European / AmericanTraditional AsianDigestionRead full entryClose entry
Caraway
Carum carvi
Part used or form
Dried seed (fruit)
How it is used
By mouth
Also called
Caraway seed
Traditional / historical use
- Bloating and gas
- Indigestion
- Traditionally used to ease colic
Historical use is not evidence that it works.
What has been studied
- Indigestion (often combined with peppermint oil)
- Irritable bowel symptoms
Current evidence label
Limited / mixed evidence
Some clinical trials, mostly of caraway oil combined with peppermint oil, suggest a modest benefit for indigestion symptoms, but caraway alone is less studied.
Safety
Caraway used as a culinary spice or tea is widely considered safe; concentrated essential oil is more potent and can irritate the stomach or skin.
Avoid or use caution
- Concentrated essential oil taken undiluted
- Known allergy to related plants such as carrot or celery
Medicine interactions
- May affect blood sugar levels
Children
Caraway as a culinary spice is commonly used in family cooking; concentrated oil supplements are not established for children. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
Pregnancy and breastfeeding
Culinary use is common; concentrated extracts and oils should be discussed with a provider. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally the whole or crushed seeds were chewed after meals or steeped as a tea to ease digestion.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Indigestion — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Cardamom
Elettaria cardamomum
Traditional use — evidence not establishedAn aromatic seed pod central to South Asian and Middle Eastern cooking, also used in Ayurvedic and Unani tradition for digestion.
Herbs & BotanicalsTraditional AsianOther Traditional SystemsDigestionMetabolic/Blood SugarRead full entryClose entry
Cardamom
Elettaria cardamomum
Part used or form
Dried seed pods
How it is used
By mouth
Also called
Green cardamom · Elaichi
Traditional / historical use
- Indigestion and bloating
- Bad breath in folk use
- Traditionally chewed after meals
Historical use is not evidence that it works.
What has been studied
- Blood pressure
- Cholesterol
- Blood sugar (mostly small, preliminary trials)
Current evidence label
Traditional use — evidence not established
A handful of small trials suggest possible modest metabolic effects, but the research base is thin, and cardamom's role in most studies has been as a food or spice extract rather than a treatment.
Safety
Culinary use is considered safe for most people; concentrated supplement extracts are less studied for long-term safety.
Avoid or use caution
- Gallstones (as with other aromatic digestive spices)
Medicine interactions
- May add to the effect of blood pressure medicines
Children
Cardamom as a culinary spice is used in family cooking across many cultures; concentrated supplements are not established for children. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
Pregnancy and breastfeeding
Culinary use is common in pregnancy; concentrated extracts should be discussed with a provider. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally the whole pods were crushed and simmered in tea or milk, or the seeds chewed directly after meals.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
Carrots
Daucus carota
Limited / mixed evidenceA common root vegetable, well known as a dietary source of beta-carotene, used in general nutrition guidance rather than as a treatment.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsGeneral NutritionRead full entryClose entry
Carrots
Daucus carota
Part used or form
Root vegetable, raw or cooked
How it is used
By mouth
Traditional / historical use
- An everyday vegetable in many cuisines
- A folk belief that carrots dramatically improve eyesight
Historical use is not evidence that it works.
What has been studied
- Vitamin A (beta-carotene) intake as part of an overall diet
Current evidence label
Limited / mixed evidence
Carrots are a genuine dietary source of beta-carotene, which supports normal vision as part of adequate vitamin A status, but the popular idea that eating extra carrots meaningfully improves eyesight beyond what a normal diet already provides is not supported by evidence.
Safety
Very low risk as food. Raw whole or large chunks of carrot are a well-documented choking hazard for young children.
Avoid or use caution
- Raw whole carrots or large hard chunks — choking hazard for infants and young children
Children
Serve raw carrot grated, thinly sliced, or well-cooked and soft for young children; whole raw carrot sticks and coins are a known choking risk.
Pregnancy and breastfeeding
An ordinary, nutritious vegetable during pregnancy; no special restriction described in general nutrition guidance.
How it was traditionally prepared
Eaten raw, grated, juiced, or cooked in stews, soups and roasted dishes.
Sources and further reading
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Choking — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Toddler nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Immune / general wellness
Related remedies
Cascara Sagrada
Frangula purshiana (Rhamnus purshiana)
Evidence against / not recommendedThe dried bark of a Pacific Northwest tree used for over a century as a stimulant laxative, once sold over the counter in the United States until regulators concluded its safety and effectiveness data were insufficient.
Herbs & BotanicalsTraditional European / AmericanTraditional African / African DiasporaHistorical remedy onlyHigh caution — do not self-treatDigestionRead full entryClose entry
Cascara Sagrada
Frangula purshiana (Rhamnus purshiana)
Historical remedy only
This entry is here to record what people did in the past. It is not supported for use today, and this page deliberately gives no instructions for using it.
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Removed from FDA's over-the-counter laxative monograph for insufficient safety/effectiveness data
- Liver injury has been reported with long-term use
- Long-term use linked to laxative dependence and electrolyte loss
Part used or form
Dried, aged bark
How it is used
By mouth
Also called
Sacred bark · Rhamnus purshiana
Traditional / historical use
- Constipation, used historically as a stimulant laxative
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Evidence against / not recommended
Cascara sagrada was used for decades as an over-the-counter laxative, but the U.S. FDA concluded in 2002 that manufacturers had not submitted adequate data proving it was safe and effective for that use, and it was removed from the over-the-counter drug monograph. [1](https://www.federalregister.gov/documents/2002/05/09/02-11510/status-of-certain-additional-over-the-counter-drug-category-ii-and-iii-active-ingredients)
Safety
Long-term or excessive use of stimulant laxatives like cascara has been linked to dependence on laxatives, electrolyte disturbances, and case reports of liver injury, so it is described here for historical reference only, not as a home remedy to use.
Avoid or use caution
- Anyone with constipation should see a clinician for evaluation and modern, evidence-based options rather than using cascara
Medicine interactions
- Can worsen loss of potassium with diuretics or heart medicines (digoxin)
- May add to the effect of other laxatives
Children
Not advised for children in any form; this is a historical remedy, not a current one.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding; this is a historical remedy, not a current one. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Bark was traditionally aged for at least a year to reduce its harshness, then dried and brewed as a decoction or made into tablets and liquid extracts sold as an over-the-counter laxative.
Sources and further reading
- Constipation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- LiverTox — herbal and dietary supplements section — NIH NIDDK / NCBI BookshelfU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Cashews
Anacardium occidentale
Some evidenceA tree nut eaten roasted as a snack or ground into butter, discussed in nutrition guidance as a source of unsaturated fat and minerals.
Foods & Kitchen RemediesOther Traditional SystemsTraditional AsianTraditional African / African DiasporaHeart/CirculationGeneral NutritionRead full entryClose entry
Cashews
Anacardium occidentale
Part used or form
Tree nut seed, roasted, whole or ground into butter
How it is used
By mouth
Also called
Cashew nuts
Traditional / historical use
- An everyday snack and cooking ingredient across South Asian, Southeast Asian, African and Latin American cuisines
Historical use is not evidence that it works.
What has been studied
- Blood cholesterol and heart health as part of an overall diet pattern that includes nuts
Current evidence label
Some evidence
General nutrition guidance places cashews among nuts associated with more favorable cholesterol markers when they replace less healthy fats in the diet, as part of an overall eating pattern rather than as a standalone treatment.
Safety
Tree nuts, including cashews, are a major food allergen and reactions can be serious. Raw cashews sold commercially have already been steamed or heat-processed to remove a naturally occurring skin irritant; whole nuts are a choking hazard for young children.
Avoid or use caution
- Known tree nut allergy — avoid
- Whole nuts — choking hazard for infants and young children
Children
Whole cashews should not be given to infants and young children because of choking risk; ground or butter forms can be considered from an appropriate age if there is no nut allergy.
Pregnancy and breastfeeding
An ordinary food during pregnancy for people without a nut allergy; no special restriction described in general nutrition guidance.
How it was traditionally prepared
Roasted and eaten whole as a snack, ground into cashew butter, or blended into sauces and dairy-free creams.
Sources and further reading
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Food allergy — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Choking — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Metabolic
Related remedies
Castor Oil (Topical)
Ricinus communis
Traditional use — evidence not establishedA thick, viscous oil applied to skin — often as a warm 'pack' held over the abdomen — in a folk tradition that is entirely separate from swallowing castor oil as a laxative, which is a different, more risky use not covered here.
Topical / SkinTraditional African / African DiasporaTraditional AsianOther Traditional SystemsSkinRead full entryClose entry
Castor Oil (Topical)
Ricinus communis
Part used or form
Thick oil pressed from castor beans, applied to skin, sometimes under a warm cloth as a 'castor oil pack'
How it is used
On the skin
Also called
Ricinus oil for skin · Castor oil packs
Traditional / historical use
- Skin and scalp moisturizing
- Castor oil packs over the abdomen for general comfort
- Traditional eyelash and eyebrow conditioning
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
There is essentially no controlled clinical research on topical castor oil or castor oil packs for any specific condition; use is based entirely on tradition.
Safety
Topical use on intact skin is generally considered low risk for most people, with occasional contact irritation or allergic rash. This entry covers skin use only — swallowing castor oil as a laxative is a separate, stronger practice with its own cramping and dehydration risks and is not described here.
Avoid or use caution
- Broken or irritated skin
- Known allergy to castor oil
- Do not swallow castor oil expecting the effects described here
Children
Patch-test on a small area first. For infants, ask the child's doctor before applying any new product to the skin.
Pregnancy and breastfeeding
Topical use on intact skin is generally considered low risk; swallowing castor oil to try to bring on labor is not advised without direct medical supervision. Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Castor beans have traditionally been pressed for oil, which is rubbed onto skin or scalp, or warmed and applied under a cloth with heat as a 'pack.'
Sources and further reading
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary supplements — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Musculoskeletal / pain
Related remedies
Cat's Claw
Uncaria tomentosa
Traditional use — evidence not establishedA woody vine from the Amazon with hooked thorns, used by Indigenous Peruvian communities and sold today for joints and immunity.
Herbs & BotanicalsOther Traditional SystemsSerious safety warningPainInflammationRead full entryClose entry
Cat's Claw
Uncaria tomentosa
Part used or form
Inner bark and root of an Amazonian vine
Also called
Uña de gato · Life-giving vine of Peru
Traditional / historical use
- Joint pain and swelling
- Digestive complaints
- Infections
- General wellness
Historical use is not evidence that it works.
What has been studied
- Rheumatoid and osteoarthritis
- Immune function
Current evidence label
Traditional use — evidence not established
Only a small number of human studies exist, so cat's claw has not been shown to help any specific condition.
Safety
Reported side effects are usually mild — headache, dizziness, digestive upset — but long-term safety is not well studied.
Avoid or use caution
- Autoimmune conditions
- After an organ transplant
- Before surgery
Medicine interactions
- May affect medicines that suppress the immune system
- May affect medicines processed by the liver
- May lower blood pressure alongside blood-pressure medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
The inner bark was traditionally simmered into a long-boiled decoction.
Sources and further reading
- Cat's claw — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Musculoskeletal / pain
Catnip
Nepeta cataria
Traditional use — evidence not establishedA mint-family plant best known for its effect on cats, also brewed as a calming, mildly digestive tea in European and American folk tradition.
Teas & InfusionsTraditional European / AmericanSleepDigestionRead full entryClose entry
Catnip
Nepeta cataria
Part used or form
Dried leaf and flower, brewed as tea
How it is used
By mouth
Also called
Catmint · Nepeta cataria
Traditional / historical use
- Mild sleeplessness or restlessness (folk use)
- Indigestion and gas
- Colicky fussiness in infants (historical folk use, not currently advised)
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Catnip tea has a long folk history as a mild calming and digestive remedy, but there is little modern clinical research on it in humans.
Safety
Catnip tea is generally considered low risk for most adults in modest, occasional amounts. It was historically given to fussy infants, but giving herbal teas to infants is not advised today because of choking, allergy and dilution-of-nutrition concerns.
Avoid or use caution
- Use with other sedatives
- Infants and young children
Medicine interactions
- May add to the effect of sedating medicines
Children
Historically given to fussy infants as a folk tea, this is not advised today. Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried leaf and flower were traditionally steeped as a mild tea, sometimes smoked or made into a poultice for minor skin complaints.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Insomnia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Nervous system / sleep
Related remedies
Cayenne (Capsaicin)
Capsicum annuum
Limited / mixed evidenceThe hot fruit of the chili pepper plant, a kitchen staple worldwide and a traditional warming remedy for digestion and circulation. The topical capsaicin cream made from the same plant is a separate entry.
Foods & Kitchen RemediesTraditional African / African DiasporaOther Traditional SystemsTraditional European / AmericanSerious safety warningDigestionHeart/CirculationRead full entryClose entry
Cayenne (Capsaicin)
Capsicum annuum
Part used or form
Dried pepper fruit, eaten or taken as capsules
How it is used
By mouth
Also called
Cayenne pepper · Chili pepper · Capsicum
Traditional / historical use
- Digestive stimulant
- Warming remedy for cold hands and feet
- Sore throat gargle in folk use
Historical use is not evidence that it works.
What has been studied
- Metabolism and appetite
- Digestive comfort
Current evidence label
Limited / mixed evidence
Capsaicin, the compound that makes chili peppers hot, has been studied mostly as a topical treatment (see the related capsaicin cream entry); oral cayenne itself has much less clinical research behind its traditional digestive and circulatory uses.
Safety
Culinary amounts are safe for most people. Concentrated cayenne supplements or very hot peppers can irritate the stomach, worsen reflux, and are not recommended for anyone with active ulcers.
Avoid or use caution
- Stomach ulcers or reflux disease
- Hemorrhoids (can worsen irritation)
Medicine interactions
- May add to the effect of blood-thinning medicines
- May irritate the stomach alongside NSAIDs
Children
Cayenne as a mild culinary spice is common in family cooking; concentrated capsules are not a children's remedy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
Pregnancy and breastfeeding
Culinary use is common in pregnancy; concentrated supplements should be discussed with a provider. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally the dried, ground pepper was added to food and drinks, or infused in vinegar or oil as a folk tonic.
Sources and further reading
- Cayenne — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Indigestion — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular
Related remedies
Celery Seed
Apium graveolens
Traditional use — evidence not establishedThe small dried seeds of the celery plant, used as a spice and, in folk tradition, as a mild diuretic and joint remedy distinct from eating the celery stalk.
Herbs & BotanicalsTraditional European / AmericanTraditional AsianUrinaryPainRead full entryClose entry
Celery Seed
Apium graveolens
Part used or form
Dried seed (fruit) of the celery plant
How it is used
By mouth
Traditional / historical use
- Water retention in folk use
- Joint aches and gout in folk tradition
- Digestive complaints
Historical use is not evidence that it works.
What has been studied
- Blood pressure
- Uric acid and gout-related markers (small studies)
Current evidence label
Traditional use — evidence not established
Laboratory and small preliminary studies hint at possible diuretic and anti-inflammatory activity, but well-designed human trials on celery seed extract are scarce.
Safety
Culinary use as a spice is considered safe; concentrated seed extracts are more potent and less studied, and celery allergy is relatively common in some regions.
Avoid or use caution
- Kidney disease
- Known celery allergy
- Pregnancy (concentrated extract)
Medicine interactions
- May add to the effect of diuretics and blood pressure medicines
- May add to the effect of blood-thinning medicines
- Photosensitizing compounds may increase sun sensitivity
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Traditional sources describe uterine-stimulant effects for the concentrated seed.
How it was traditionally prepared
Traditionally the dried seeds were used whole as a spice or steeped as a tea.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Musculoskeletal / pain · Urinary
Chaga Mushroom
Inonotus obliquus
Traditional use — evidence not establishedA hard, charcoal-like fungus that grows on birch trees, traditionally steeped as a dark tea in Siberia, Northern Europe and parts of North America and now sold worldwide as a powder or extract.
Herbs & BotanicalsTraditional AsianTraditional European / AmericanOther Traditional SystemsSerious safety warningGeneral NutritionOtherRead full entryClose entry
Chaga Mushroom
Inonotus obliquus
Part used or form
Hardened black fungal growth (conk) from birch trees, dried and steeped or powdered
How it is used
By mouth
Also called
Inonotus obliquus · Cinder conk · Clinker polypore
Traditional / historical use
- A daily steeped tea in Siberian, Baltic and Northern European folk practice
- General wellness and vitality tonic in traditional use
Historical use is not evidence that it works.
What has been studied
- Antioxidant activity in laboratory and small human studies
- Blood sugar and immune-marker effects in early, small-scale research
Current evidence label
Traditional use — evidence not established
Chaga has a long folk history as a steeped tonic, but human clinical research is limited to small, early-stage studies. There is no reliable evidence that chaga treats any disease, and claims about cancer or immune “boosting” go beyond what the research supports.
Safety
Chaga is high in oxalates and has been linked to kidney injury in people with existing kidney disease or a history of kidney stones. It can affect blood sugar and blood clotting, and wild-harvested chaga carries the same misidentification risks as any wild fungus. Wild mushrooms should never be gathered and eaten based on pictures or apps alone: several deadly poisonous species closely resemble edible or medicinal ones, and misidentification poisoning can cause severe liver or kidney injury or death. Store-bought or reliably cultivated mushrooms and supplements from established brands avoid this specific risk.
Avoid or use caution
- Kidney disease or history of kidney stones — chaga's high oxalate content is a documented concern
- Bleeding disorders or upcoming surgery
- Diabetes medicines that lower blood sugar
Medicine interactions
- May increase the effect of diabetes medicines, raising the risk of low blood sugar
- May increase bleeding risk with blood thinners or antiplatelet medicines
Children
There is no established safe use of chaga supplements in children; it should not be given to children outside a clinician's advice.
Pregnancy and breastfeeding
Chaga has not been studied for safety in pregnancy or breastfeeding, so it is best avoided in both.
How it was traditionally prepared
Traditionally chipped or grated from the hardened conk and simmered into a dark, bitter tea.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- LiverTox — herbal and dietary supplements section — NIH NIDDK / NCBI BookshelfU.S. federal health source
- Traditional medicine — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Metabolic · Immune / general wellness
Related remedies
Chamomile
Matricaria chamomilla / Chamaemelum nobile
Limited / mixed evidenceA small daisy-like flower brewed as a calming tea across Europe, the Middle East and the Americas for centuries.
Teas & InfusionsTraditional European / AmericanSerious safety warningSleepStress/AnxietyDigestionSkinRead full entryClose entry
Chamomile
Matricaria chamomilla / Chamaemelum nobile
Part used or form
Dried flower heads
Also called
German chamomile · Roman chamomile · Camomile
Traditional / historical use
- Sleep and calm
- Upset stomach and gas
- Mouth rinse
- Skin irritation
Historical use is not evidence that it works.
What has been studied
- Anxiety
- Sleep
- Digestive upset
- Mouth sores from cancer treatment
Current evidence label
Limited / mixed evidence
Chamomile is one of the most-used herbal teas in the world, but human research is limited and results for sleep and anxiety are mixed rather than conclusive.
Safety
Chamomile tea is generally considered safe for most adults. Allergic reactions can happen, especially in people allergic to ragweed, daisies or marigolds.
Avoid or use caution
- Ragweed or daisy family allergy
- Blood-thinner use
Medicine interactions
- May add to the effect of sedatives
- May increase bleeding risk with blood thinners such as warfarin
Children
Chamomile tea is a common household drink, but do not use herbal products to treat a sick child without asking a doctor, and never give honey-sweetened drinks to a baby under 1 year.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried flowers were steeped in hot water as a tea, used as a warm compress, or added to bath water.
Sources and further reading
- Chamomile — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Skin · Nervous system / sleep
Chamomile Tea
Matricaria chamomilla
Limited / mixed evidenceThe everyday brewed-tea form of chamomile, distinct from concentrated chamomile extracts or supplement capsules, and the form most people mean by 'chamomile tea before bed.'
Teas & InfusionsTraditional European / AmericanSleepDigestionStress/AnxietyRead full entryClose entry
Chamomile Tea
Matricaria chamomilla
Part used or form
Dried flower heads steeped as a hot-water infusion
How it is used
By mouth
Also called
German chamomile infusion · Roman chamomile infusion
Traditional / historical use
- Settling the stomach after meals
- Winding down before sleep
- Mild fussiness in older children (as a mild, weak infusion, with a doctor's input)
Historical use is not evidence that it works.
What has been studied
- Sleep quality
- Mild anxiety
- Digestive comfort
Current evidence label
Limited / mixed evidence
Small trials suggest chamomile tea or extract may modestly help sleep quality and mild anxiety, but studies are small, often industry-linked, and not strong enough to call chamomile tea a proven sleep aid.
Safety
A cup of brewed chamomile tea is widely considered one of the gentler herbal teas for most adults. Allergic reactions occur in people sensitive to ragweed, daisies, marigolds or related plants.
Avoid or use caution
- Allergy to ragweed-family plants
- Pregnancy — large or frequent amounts
- People on blood thinners
Medicine interactions
- May add to the effect of blood-thinning medicines and sedatives with regular, heavy use
Children
A weak, well-strained infusion is a traditional folk remedy in some families, but ask the child's doctor first, especially for infants and toddlers, because of allergy risk.
Pregnancy and breastfeeding
Occasional weak tea is generally considered low risk by most sources, but frequent or strong use in pregnancy is not well studied. Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried flower heads have traditionally been steeped whole in hot water for several minutes and strained before drinking.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy sleep — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Nervous system / sleep
Related remedies
Chasteberry
Vitex agnus-castus
Limited / mixed evidenceA peppery Mediterranean berry used since antiquity, today mainly for premenstrual symptoms.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningPainMenstrual/MenopauseRead full entryClose entry
Chasteberry
Vitex agnus-castus
Part used or form
Dried ripe fruit
Also called
Vitex · Chaste tree berry · Monk's pepper
Traditional / historical use
- Menstrual complaints
- Breast tenderness
- Fertility beliefs
Historical use is not evidence that it works.
What has been studied
- Premenstrual syndrome
- Cyclical breast pain
- Menopause symptoms
Current evidence label
Limited / mixed evidence
A handful of studies suggest chasteberry may ease premenstrual symptoms, but the research is limited and not consistent enough to be conclusive.
Safety
Side effects are usually mild — digestive upset, headache, rash. It may affect hormone levels.
Avoid or use caution
- Hormone-sensitive conditions
- In-vitro fertilisation or fertility treatment
Medicine interactions
- May interfere with hormonal birth control and hormone therapy
- May interact with medicines affecting dopamine, including some for Parkinson's disease
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried berries were ground as a pepper substitute or tinctured.
Sources and further reading
- Chasteberry — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Musculoskeletal / pain · Reproductive / menstrual / menopause
Chia Seeds
Salvia hispanica
Limited / mixed evidenceA small seed from Central America, historically a staple food of Aztec and Maya diets, now popular as a fiber and plant-omega-3 source.
Foods & Kitchen RemediesOther Traditional SystemsDigestionHeart/CirculationGeneral NutritionRead full entryClose entry
Chia Seeds
Salvia hispanica
Part used or form
Whole seed — eaten dry, soaked into a gel, or ground
How it is used
By mouth
Also called
Chia
Traditional / historical use
- Historical staple food of Central American Indigenous diets
- Ground into flour or drinks
Historical use is not evidence that it works.
What has been studied
- Fiber intake and regularity
- Blood sugar response after meals
- Blood lipids in small trials
Current evidence label
Limited / mixed evidence
Chia seeds are a concentrated source of soluble and insoluble fiber and plant-based omega-3 fat, both of which health agencies link to digestive regularity and heart health as part of an overall diet. Direct evidence that chia seeds themselves treat any condition is limited to small studies.
Safety
Dry chia seeds swallowed without enough liquid can swell in the throat or esophagus and have caused rare choking and blockage reports, particularly when swallowed by the spoonful in dry form. Soaking seeds in liquid before eating, or eating them already mixed into food, avoids this. Extra fiber needs extra fluid to avoid constipation or bloating.
Avoid or use caution
- Do not swallow dry seeds without soaking them or mixing them into a moist food or drink first
- Increase fiber gradually and drink enough fluid
- Swallowing difficulties or a narrowed esophagus
Medicine interactions
- May add to the blood-sugar-lowering or blood-thinning effect of some medicines because of its fiber and omega-3 content
Children
Dry chia seeds are a choking and swelling hazard for young children; if given at all, they should be well soaked into a gel or mixed thoroughly into food, and a doctor should be asked first for infants.
Pregnancy and breastfeeding
Ordinary food in soaked or mixed-in form; there is no established reason to avoid it, but the same soaking and fluid precautions apply.
How it was traditionally prepared
Soaked in water or milk to form a gel, stirred into oatmeal or yogurt, or ground into flour.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Constipation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular
Related remedies
Chickpeas
Cicer arietinum
Some evidenceA pulse widely eaten across the Middle East, South Asia and the Mediterranean, valued in nutrition guidance as a plant protein and fiber source.
Foods & Kitchen RemediesOther Traditional SystemsTraditional AsianTraditional European / AmericanDigestionMetabolic/Blood SugarHeart/CirculationGeneral NutritionRead full entryClose entry
Chickpeas
Cicer arietinum
Part used or form
Dried or canned seed (legume), cooked or ground into flour or paste
How it is used
By mouth
Also called
Garbanzo beans · Chana
Traditional / historical use
- Everyday staple food across many cuisines
- A meat substitute in vegetarian eating patterns
Historical use is not evidence that it works.
What has been studied
- Fiber intake and digestive regularity
- Blood cholesterol and blood sugar as part of an overall diet pattern
Current evidence label
Some evidence
Pulses such as chickpeas are recommended in general healthy-eating guidance as a fiber- and protein-rich alternative to some animal proteins. Diets higher in legumes are associated with better cholesterol and blood sugar markers, but chickpeas themselves are not a treatment for any disease.
Safety
Very low risk as food for most people. Legumes can cause gas or bloating, especially when intake increases quickly, and dried chickpeas must be cooked thoroughly before eating.
Avoid or use caution
- Increase legume intake gradually to reduce gas and bloating
- Dried chickpeas must be soaked and fully cooked, never eaten raw
Children
A well-cooked, mashed or soft form is appropriate for young children; whole chickpeas can be a choking hazard for infants and toddlers.
Pregnancy and breastfeeding
An ordinary and nutritious food during pregnancy as part of a balanced diet; no special restriction is described in general nutrition guidance.
How it was traditionally prepared
Cooked whole in stews and salads, mashed into spreads such as hummus, or ground into flour for breads and batters.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary proteins — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular · Metabolic
Related remedies
Chickweed
Stellaria media
Traditional use — evidence not establishedA common low-growing garden weed long applied to the skin in European and American folk medicine for itching, minor irritation and small wounds.
Topical / SkinTraditional European / AmericanSerious safety warningSkinRead full entryClose entry
Chickweed
Stellaria media
Part used or form
Fresh or dried aerial parts, used as a topical poultice, salve or wash
How it is used
On the skin
Also called
Stellaria media
Traditional / historical use
- Itchy or irritated skin (topical)
- Minor cuts, scrapes and rashes (topical)
- Eaten as a wild salad green
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Chickweed has a long folk-medicine history for soothing skin complaints, but there is little modern clinical research testing it directly.
Safety
Topical use on unbroken skin is generally considered low risk for most people; skin irritation or allergic reaction is possible, and wild-foraged plants carry a risk of misidentification with toxic look-alikes.
Avoid or use caution
- Broken or infected skin (see a clinician instead)
- Foraging without expert plant identification
Children
Topical use on unbroken skin is sometimes described in folk sources, but check with a pediatrician before using any plant preparation on a child's skin.
Pregnancy and breastfeeding
Topical use on unbroken skin has not been well studied; oral use is not advised. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh aerial parts were traditionally crushed into a poultice, infused into a salve or oil, or made into a cool wash for the skin.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Related remedies
Chicory Root
Cichorium intybus
Limited / mixed evidenceThe root of a blue-flowered roadside plant, traditionally roasted as a coffee substitute and used in European folk medicine as a digestive and 'liver tonic' herb; today its fiber (inulin) is also extracted as a food additive.
Herbs & BotanicalsTraditional European / AmericanDigestionRead full entryClose entry
Chicory Root
Cichorium intybus
Part used or form
Roasted, dried root; root fiber (inulin)
How it is used
By mouth
Also called
Cichorium intybus · Coffee chicory
Traditional / historical use
- Indigestion and loss of appetite (folk 'bitter tonic' use)
- 'Liver and gallbladder tonic' use
- Roasted root as a coffee substitute
Historical use is not evidence that it works.
What has been studied
- Chicory root fiber (inulin) and digestive/gut bacteria effects
Current evidence label
Limited / mixed evidence
Chicory root fiber (inulin) has been studied as a prebiotic that can shift gut bacteria and soften stool, with modest and inconsistent effects; the whole-root 'tonic' folk uses have not been separately tested in reliable human trials.
Safety
Roasted chicory root as a coffee substitute is widely eaten and considered safe for most people. Chicory fiber supplements can cause gas and bloating, especially at first, and allergic reactions have been reported in people sensitive to ragweed-family plants.
Avoid or use caution
- Allergy to ragweed, daisies or related plants
- Gallstones or bile duct blockage
Medicine interactions
- May add to the effect of diabetes medicines
- May increase bile flow, which matters with gallstones or bile duct blockage
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried root was traditionally roasted and brewed like coffee, or simmered as a bitter decoction for digestive complaints.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Chiropractic and Spinal Manipulation
Some evidenceA hands-on therapy, most often performed by chiropractors, using controlled force to move a joint of the spine or other body part beyond its usual range of motion.
Mind-Body / Non-Drug PracticesTraditional European / AmericanHigh caution — do not self-treatPainRead full entryClose entry
Chiropractic and Spinal Manipulation
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Rare reports of serious blood vessel injury or stroke after neck manipulation
Part used or form
Hands-on or instrument-assisted manipulation of the spine and joints by a trained practitioner
How it is used
On the body — hands-on manual therapy
Also called
Chiropractic adjustment · Spinal manipulation therapy
Traditional / historical use
- Back and neck pain relief
- General joint mobility
Historical use is not evidence that it works.
What has been studied
- Low back pain
- Neck pain
- Headache
Current evidence label
Some evidence
Spinal manipulation has moderate evidence for short-term relief of low back pain and some evidence for neck pain and certain headaches, with effects broadly similar in size to other standard conservative treatments.
Safety
Soreness or stiffness after treatment is common and usually mild. Serious complications are rare overall, but neck manipulation in particular has been linked in rare cases to blood vessel injury and stroke.
Avoid or use caution
- Severe osteoporosis, spinal cord compression, bone fractures, or increased stroke risk — discuss with a doctor first
- Blood-thinner use — tell the practitioner
- Seek urgent care for sudden severe headache, vision changes, slurred speech or weakness after neck manipulation
Children
Use only a practitioner experienced with children; evidence in children is limited and risks are not fully established.
Pregnancy and breastfeeding
Some chiropractors offer pregnancy-adapted techniques; tell the practitioner you are pregnant and confirm they have relevant training.
How it was traditionally prepared
Modern chiropractic developed in the late 19th century in the United States, building on older traditions of manual joint manipulation.
Sources and further reading
- Chiropractic care — in depth — NIH NCCIHU.S. federal health source
- Spinal manipulation — what you need to know — NIH NCCIHU.S. federal health source
- Back pain — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Musculoskeletal / pain
Related remedies
Chlorella
Chlorella vulgaris
Limited / mixed evidenceA green freshwater algae grown as a nutritional supplement, marketed as a 'superfood' and detox aid, mainly a modern rather than a long historical remedy.
Foods & Kitchen RemediesTraditional AsianOther Traditional SystemsGeneral NutritionMetabolic/Blood SugarRead full entryClose entry
Chlorella
Chlorella vulgaris
Part used or form
Dried single-celled freshwater algae, sold as powder or tablets
How it is used
By mouth
Traditional / historical use
No documented traditional use recorded here.
Historical use is not evidence that it works.
What has been studied
- Cholesterol
- Blood pressure
- Immune markers
- Heavy metal binding claims
Current evidence label
Limited / mixed evidence
Some small trials suggest modest effects on cholesterol or blood pressure, but studies are limited, and claims that chlorella 'detoxifies' the body from heavy metals or other toxins are not well supported by good evidence.
Safety
Generally tolerated by most adults, though it can cause digestive upset, gas, and green discoloration of stool; contamination with heavy metals or microcystin toxins has been reported in some poorly regulated products.
Avoid or use caution
- People on warfarin or other blood thinners
- Iodine sensitivity or thyroid conditions
- Autoimmune conditions
Medicine interactions
- Very high in vitamin K, which can interfere with blood-thinning medicines like warfarin
- May affect immune-suppressing medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
A modern cultivated supplement rather than a traditional preparation; sold as dried powder or pressed tablets.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Dietary supplements — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Antioxidants — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Metabolic · Immune / general wellness
Cinnamon
Cinnamomum verum / Cinnamomum cassia
Limited / mixed evidenceA everyday kitchen spice from tree bark, traded for millennia and now studied for blood sugar.
Foods & Kitchen RemediesTraditional AsianTraditional European / AmericanDigestionCough/ColdSkinHeart/CirculationMetabolic/Blood SugarRead full entryClose entry
Cinnamon
Cinnamomum verum / Cinnamomum cassia
Part used or form
Dried inner bark, whole or ground
Also called
Cassia cinnamon · Ceylon cinnamon · True cinnamon
Traditional / historical use
- Digestive complaints
- Colds
- Warming tonic
- Flavouring and preserving food
Historical use is not evidence that it works.
What has been studied
- Type 2 diabetes and blood sugar
- Cholesterol
- Irritable bowel syndrome
Current evidence label
Limited / mixed evidence
Studies of cinnamon for blood sugar and cholesterol have produced mixed and mostly small results; it is not a treatment for diabetes.
Safety
Cinnamon as a spice in food is generally safe. Cassia cinnamon contains coumarin, which can be hard on the liver in large supplement amounts.
Avoid or use caution
- Liver disease
- Large supplement doses of cassia cinnamon
- Do not inhale or swallow spoonfuls of dry powder — this can injure the lungs
Medicine interactions
- May affect blood sugar alongside diabetes medicines
- High-coumarin cassia may matter with blood thinners and liver medicines
Children
Cinnamon in food is fine for most children; cinnamon supplements are not a children's remedy. The 'cinnamon challenge' is dangerous.
Pregnancy and breastfeeding
Food amounts are ordinary; avoid supplement doses. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Bark quills were steeped in tea, simmered in milk, or ground into spice blends and preserves.
Sources and further reading
- Cinnamon — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Respiratory · Skin · Cardiovascular · Metabolic
Cinnamon Tea
Cinnamomum verum / Cinnamomum cassia
Limited / mixed evidenceCinnamon bark simmered into a warming, sweet-spiced tea, drunk widely as a comfort beverage and studied in larger amounts for blood sugar.
Teas & InfusionsTraditional AsianTraditional European / AmericanOther Traditional SystemsMetabolic/Blood SugarDigestionRead full entryClose entry
Cinnamon Tea
Cinnamomum verum / Cinnamomum cassia
Part used or form
Bark or cinnamon sticks simmered or steeped in hot water
How it is used
By mouth
Also called
Cinnamon stick tea · Cinnamon infusion
Traditional / historical use
- Warming winter drink
- Digestive comfort
- Traditional cold-weather remedy
Historical use is not evidence that it works.
What has been studied
- Blood sugar in type 2 diabetes (mostly studied as capsules/extracts, not tea)
Current evidence label
Limited / mixed evidence
Some studies of concentrated cinnamon supplements suggest a small effect on blood sugar; a cup of cinnamon tea contains far less cinnamon than the studied doses, so effects from tea alone are likely much smaller, if present at all.
Safety
Generally safe as an occasional tea. Cassia cinnamon (the common grocery-store type) contains coumarin, which can affect the liver in large, regular amounts — a concern for concentrated supplements more than occasional tea.
Avoid or use caution
- Liver conditions — avoid frequent, strong cassia cinnamon tea
- Diabetes medicine use — monitor blood sugar
Medicine interactions
- May affect blood sugar and add to the effect of diabetes medicines
- Coumarin in cassia cinnamon may interact with blood thinners in large amounts
Children
An occasional mild cinnamon tea is a common household drink; it is not a treatment for diabetes in a child, which needs medical management.
Pregnancy and breastfeeding
Occasional culinary use is common; ask a clinician before drinking large amounts of strong cinnamon tea regularly in pregnancy.
How it was traditionally prepared
Cinnamon sticks or bark simmered in water, often with other spices, honey or milk.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- LiverTox — herbal and dietary supplements section — NIH NIDDK / NCBI BookshelfU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
Citrus Fruits (General)
Citrus spp.
Some evidenceThe citrus family (oranges, lemons, limes, grapefruit, mandarins and others) is grouped here for what its members share: vitamin C and plant antioxidants, plus a family-wide interaction issue with some medicines that is described in individual entries.
Foods & Kitchen RemediesTraditional AsianTraditional European / AmericanOther Traditional SystemsGeneral NutritionCough/ColdRead full entryClose entry
Citrus Fruits (General)
Citrus spp.
Part used or form
Whole fruit, juice, or zest
How it is used
By mouth
Also called
Citrus · Citrus family
Traditional / historical use
- Everyday eating and cooking
- A traditional food during colds
- Preserving and flavoring food
Historical use is not evidence that it works.
What has been studied
- Vitamin C intake and immune-related nutrition
- Historical prevention of scurvy on long sea voyages
Current evidence label
Some evidence
Citrus fruits are a leading dietary source of vitamin C, an essential nutrient with a well-established historical link to preventing scurvy. Modern evidence that extra vitamin C from food shortens or prevents the common cold in generally well-nourished people is limited and mixed; citrus is best understood as part of a healthy overall diet rather than a cold remedy.
Safety
Safe as food for almost everyone. Citrus juice and acid can wear tooth enamel and worsen acid reflux in some people. Grapefruit specifically can interact with a range of prescription medicines (see the separate grapefruit entry).
Avoid or use caution
- Acid reflux or heartburn may be worsened by very acidic citrus juice
- Citrus allergy, which is uncommon but reported
Medicine interactions
- Grapefruit specifically interacts with many medicines processed by the same liver pathway — see the dedicated grapefruit entry
Children
Ordinary citrus fruit and juice are fine for most children in age-appropriate forms; very acidic juice can irritate a young child's mouth or worsen reflux, and whole segments with seeds should be checked for choking risk.
Pregnancy and breastfeeding
Ordinary food during pregnancy; citrus fruit and juice are a normal part of a healthy diet with no special restriction beyond usual portion sense.
How it was traditionally prepared
Eaten fresh, juiced, zested for flavoring, or preserved as marmalade.
Sources and further reading
- Vitamin C — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Antioxidants — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Immune / general wellness
Related remedies
Cleavers
Galium aparine
Traditional use — evidence not establishedA sticky-stemmed climbing weed used in European folk herbalism as a mild diuretic 'spring tonic' and applied to the skin for minor irritations.
Herbs & BotanicalsTraditional European / AmericanUrinarySkinRead full entryClose entry
Cleavers
Galium aparine
Part used or form
Fresh or dried aerial parts
How it is used
By mouth
Also called
Galium aparine · Bedstraw · Sticky weed
Traditional / historical use
- Mild fluid retention ('spring tonic', folk use)
- Minor skin irritation (topical, folk use)
- Traditional lymphatic 'tonic' use
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Cleavers is a long-standing European folk remedy, but there is essentially no modern clinical research testing its traditional uses.
Safety
Occasional use of cleavers tea or topical preparations is generally considered low risk for most healthy adults; information on long-term safety and appropriate use is limited.
Avoid or use caution
- Diabetes (some traditional sources note a mild blood-sugar effect that is not well studied)
Medicine interactions
- May add to the effect of diuretic medicines (theoretical)
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh aerial parts were traditionally pressed for juice, steeped as tea, or infused into a cooling wash for the skin.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Urinary tract infections — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Urinary
Related remedies
Clinical Hypnosis
Some evidenceA guided state of focused attention and relaxation, led by a trained clinician, sometimes paired with suggestions aimed at changing perception of pain, anxiety or habits.
Mind-Body / Non-Drug PracticesTraditional European / AmericanStress/AnxietyPainNauseaRead full entryClose entry
Clinical Hypnosis
Part used or form
Guided state of focused attention and suggestion led by a trained clinician
How it is used
Whole-body practice — guided sessions with a trained practitioner
Also called
Hypnotherapy · Medical hypnosis
Traditional / historical use
No documented traditional use recorded here.
Historical use is not evidence that it works.
What has been studied
- Pain during procedures
- Irritable bowel syndrome symptoms
- Anxiety
- Smoking cessation
- Nausea from chemotherapy
Current evidence label
Some evidence
Clinical hypnosis has reasonable evidence for easing procedural pain and anxiety and for some irritable bowel symptoms, though effect sizes vary and much depends on individual suggestibility and the skill of the practitioner.
Safety
Considered safe when practiced by a trained clinician. Rarely, unpleasant memories or emotions can surface, and it is not a way to recover reliable memories.
Avoid or use caution
- Serious mental illness, including psychosis or dissociative disorders — use only under a qualified clinician's care
- Do not rely on hypnosis to retrieve or verify memories
Children
Used by trained pediatric clinicians for procedure-related pain and anxiety, generally considered safe in that setting.
Pregnancy and breastfeeding
Used in some childbirth-preparation programs; generally considered safe with a trained practitioner.
How it was traditionally prepared
Evolved from 18th- and 19th-century mesmerism into a clinical technique studied and used in medical and dental settings today.
Sources and further reading
- Hypnosis — NIH NCCIHU.S. federal health source
- Mind and body approaches for chronic pain — research review — NIH NCCIHU.S. federal health source
- Anxiety — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep
Related remedies
Clove
Syzygium aromaticum
Limited / mixed evidenceThe dried flower bud of a tropical tree, a kitchen spice worldwide and a long-standing traditional remedy for toothache and digestion.
Herbs & BotanicalsTraditional AsianOther Traditional SystemsHigh caution — do not self-treatPainDigestionRead full entryClose entry
Clove
Syzygium aromaticum
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Concentrated clove oil swallowed in quantity, especially by children, has caused serious liver injury and poisoning
Part used or form
Dried flower bud, whole or as oil
How it is used
By mouth
Also called
Clove bud
Traditional / historical use
- Toothache relief (chewed or applied to the gum)
- Digestive complaints
- Bad breath
Historical use is not evidence that it works.
What has been studied
- Dental pain and numbing (clove oil / eugenol)
- Antimicrobial activity
Current evidence label
Limited / mixed evidence
Eugenol, the main compound in clove, has documented numbing and antimicrobial activity in lab studies, and clove has a long history of dental use, but modern clinical trials are limited compared with standard dental anesthetics.
Safety
Culinary use is safe. Undiluted clove oil placed directly on gums or skin can cause burns and tissue irritation, and swallowing concentrated clove oil, especially by children, has caused serious poisoning.
Avoid or use caution
- Undiluted essential oil on skin or gums
- Bleeding disorders
- Planned surgery
Medicine interactions
- May add to the effect of blood-thinning medicines
- May affect blood sugar
Children
Keep concentrated clove oil away from children; swallowing it has caused serious harm. Culinary clove in food is different from the concentrated oil. Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Culinary use is common; concentrated oil is not advised. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Whole dried buds were traditionally chewed or held against a painful tooth, steeped in tea, or pressed for oil used sparingly on the gums.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Cocoa / Dark Chocolate
Theobroma cacao
Limited / mixed evidenceA Mesoamerican crop used ceremonially and as food for centuries, later turned into sweetened chocolate; the antioxidant compounds are in the cocoa itself, not the added sugar or milk fat.
Foods & Kitchen RemediesOther Traditional SystemsTraditional European / AmericanHeart/CirculationGeneral NutritionRead full entryClose entry
Cocoa / Dark Chocolate
Theobroma cacao
Part used or form
Roasted cocoa bean — as powder, or in chocolate with a high cocoa content
How it is used
By mouth
Also called
Cacao · Dark chocolate · Cocoa powder
Traditional / historical use
- Ceremonial and everyday drink in Aztec and Maya cultures
- A treat food in modern eating
Historical use is not evidence that it works.
What has been studied
- Blood pressure in small trials
- Blood vessel function
- Antioxidant intake
Current evidence label
Limited / mixed evidence
Cocoa is rich in flavanol antioxidant compounds, and small trials have looked at modest effects on blood pressure and blood vessel function from cocoa-rich products. Results are inconsistent, and much of commercial chocolate is high in sugar and saturated fat, which works against any benefit — the amount and type of chocolate used in studies is usually not what is sold as an everyday candy bar.
Safety
Chocolate contains caffeine and a related stimulant, so it can affect sleep or anxiety in sensitive people. It is calorie-dense and often high in added sugar, which matters for diabetes, weight, and dental health.
Avoid or use caution
- Caffeine sensitivity
- Diabetes or weight-management goals — check added sugar
- Migraine, for people who find chocolate a personal trigger
Medicine interactions
- Caffeine content can add to other caffeine intake and affect sleep
- High sugar content matters for diabetes medicine and blood sugar monitoring
Children
Ordinary treat food for most children in modest amounts within overall diet; the caffeine content is small but not zero.
Pregnancy and breastfeeding
Ordinary treat food; the caffeine it contributes counts toward overall pregnancy caffeine intake.
How it was traditionally prepared
Roasted and ground into a paste, made into a bitter traditional drink, or sweetened into chocolate bars and confections.
Sources and further reading
- Antioxidants — in depth — NIH NCCIHU.S. federal health source
- High blood pressure — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Antioxidants — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Metabolic
Related remedies
Cocoa Butter
Theobroma cacao
Evidence against / not recommendedA firm, richly emollient fat pressed from cocoa beans and applied to skin as a standalone balm or blended into lotions, distinct from cocoa/chocolate eaten as a food.
Topical / SkinTraditional African / African DiasporaOther Traditional SystemsHigh caution — do not self-treatSkinRead full entryClose entry
Cocoa Butter
Theobroma cacao
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
Part used or form
Fat pressed from cocoa beans, applied to skin as a solid balm or in lotions
How it is used
On the skin
Also called
Theobroma oil
Traditional / historical use
- Moisturizing very dry skin
- Traditional use on scars and stretch marks
Historical use is not evidence that it works.
What has been studied
- Prevention of stretch marks in pregnancy (studied and not shown to be more effective than plain moisturizer)
Current evidence label
Evidence against / not recommended
Randomized trials specifically testing cocoa butter for preventing stretch marks in pregnancy have not found it more effective than a plain moisturizing cream or no treatment, even though this is its best-known folk use.
Safety
Topical cocoa butter is generally well tolerated as a moisturizer. Contact allergy is uncommon but possible, and it can feel heavy or occlusive on acne-prone skin.
Avoid or use caution
- Acne-prone skin
- Known cocoa/chocolate contact allergy
Children
Patch-test on a small area first. For infants, ask the child's doctor before applying any new product to the skin.
Pregnancy and breastfeeding
Topical use is generally considered low risk in pregnancy as a moisturizer, but it has not been shown to prevent stretch marks specifically. Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Cocoa beans have traditionally been roasted and pressed to separate a solid fat, which is applied directly to skin or blended into balms.
Sources and further reading
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Related remedies
Coconut Oil (Topical)
Cocos nucifera
Some evidenceA solid-at-room-temperature plant oil rubbed onto skin and hair across many tropical traditions, used here strictly as a topical moisturizer rather than as a food or supplement.
Topical / SkinTraditional AsianTraditional African / African DiasporaOther Traditional SystemsSkinRead full entryClose entry
Coconut Oil (Topical)
Cocos nucifera
Part used or form
Extracted oil from the coconut kernel, applied to skin
How it is used
On the skin
Also called
Virgin coconut oil for skin
Traditional / historical use
- Moisturizing dry skin
- Massage oil
- Hair conditioning
Historical use is not evidence that it works.
What has been studied
- Mild-to-moderate eczema (as a moisturizer, small studies)
- Skin barrier hydration
Current evidence label
Some evidence
Small clinical studies, mostly in eczema, suggest virgin coconut oil can work about as well as some standard moisturizers at easing dryness and improving skin barrier measures, though it has not been shown to treat eczema itself.
Safety
Widely used and generally well tolerated on skin. It can clog pores in people prone to acne, and rare contact allergy is possible.
Avoid or use caution
- Acne-prone or very oily skin
- Known coconut allergy
- Broken or infected skin without medical advice
Children
Patch-test on a small area first. For infants, ask the child's doctor before applying any new product to the skin.
Pregnancy and breastfeeding
Topical use is generally considered low risk in pregnancy.
How it was traditionally prepared
Coconut kernels have traditionally been pressed, or heated and pressed, to yield an oil that solidifies at cool room temperature and is rubbed onto skin and hair.
Sources and further reading
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Related remedies
Cold Therapy
Some evidenceApplying cold — an ice pack or cold compress — to reduce swelling, numb pain and calm acute injuries.
Mind-Body / Non-Drug PracticesTraditional European / AmericanHigh caution — do not self-treatPainInflammationRead full entryClose entry
Cold Therapy
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Frostbite and nerve injury reported with prolonged direct skin contact
Part used or form
Ice pack or cold compress applied to the skin
How it is used
On the skin
Also called
Ice pack therapy · Cryotherapy (local) · Cold compress
Traditional / historical use
- Swelling and bruising after injury
- Numbing acute pain
- Headache relief
Historical use is not evidence that it works.
What has been studied
- Acute sprains and strains
- Post-exercise soreness
- Some headache relief
Current evidence label
Some evidence
Cold application has reasonable evidence for reducing swelling and pain in the first day or two after an acute soft-tissue injury, though the ideal duration and timing are still debated.
Safety
Generally safe for short applications with a barrier between ice and skin. Direct or prolonged contact with ice can cause frostbite or nerve injury.
Avoid or use caution
- Never apply ice directly to bare skin — use a cloth barrier
- Reduced circulation (e.g., peripheral artery disease) or reduced sensation — use caution or avoid
- Raynaud's phenomenon or cold sensitivity
- Limit each application to short periods with breaks
Children
Use a cloth barrier and shorter application times; supervise young children closely.
Pregnancy and breastfeeding
A cold compress for localized swelling or a headache is generally fine.
How it was traditionally prepared
Cold-water soaks, snow packs and, more recently, gel and ice packs have been used for injuries for centuries.
Sources and further reading
- Sprains and strains — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Back pain — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Musculoskeletal / pain
Related remedies
Comfrey
Symphytum officinale
Safety concernA leafy European plant nicknamed 'knitbone' for its long folk history in poultices for bruises and sprains. Modern testing found it contains liver-toxic compounds, which is why it is no longer used internally.
Topical / SkinTraditional European / AmericanHigh caution — do not self-treatPainInflammationSkinRead full entryClose entry
Comfrey
Symphytum officinale
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Contains liver-toxic pyrrolizidine alkaloids
- Oral comfrey products are banned from the US supplement market because of documented liver injury and death
Part used or form
Leaf and root, historically used both topically and internally
How it is used
On the skin
Also called
Knitbone · Boneset (folk name)
Traditional / historical use
- Historically applied as a poultice to bruises, sprains and healing bone
- Historically taken internally as a tea, a use now known to be unsafe
Historical use is not evidence that it works.
What has been studied
- Topical comfrey for short-term back pain and bruising (small trials of leaf-only, alkaloid-reduced products)
Current evidence label
Safety concern
Some small trials of specially processed, low-alkaloid topical comfrey creams show short-term benefit for muscle and joint pain, but this is different from traditional whole-plant preparations, and internal use has no acceptable safety profile.
Safety
Comfrey contains pyrrolizidine alkaloids that damage the liver and have caused serious, sometimes fatal, liver disease when the plant is taken by mouth. For this reason, oral comfrey products were removed from the US market, and even topical use is limited to short periods on unbroken skin with low-alkaloid products.
Avoid or use caution
- Do not take comfrey by mouth in any form
- Do not apply to broken skin or use for long stretches of time
- Liver disease
Medicine interactions
- May add to liver strain alongside other medicines processed by the liver
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Comfrey in any form is not advised in pregnancy or breastfeeding because of documented liver toxicity risk. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Historically the crushed leaf or root was made into a poultice pressed onto injured skin, or steeped as a tea — a use now known to be unsafe and not repeated here as instruction.
Sources and further reading
- Comfrey — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- LiverTox — herbal and dietary supplements section — NIH NIDDK / NCBI BookshelfU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Skin · Musculoskeletal / pain
Related remedies
Cool Compress
Some evidenceA cool, damp cloth or a wrapped ice pack held against a bump, sprain or feverish forehead to numb pain and reduce swelling.
Topical / SkinTraditional European / AmericanTraditional AsianTraditional African / African DiasporaOther Traditional SystemsPainInflammationRead full entryClose entry
Cool Compress
Part used or form
Cold, damp cloth or wrapped ice pack held against the skin
How it is used
On the skin
Also called
Cold compress · Ice pack (wrapped)
Traditional / historical use
- Bruises and sprains
- Fever comfort
- Bug bites and minor swelling
- Headache
Historical use is not evidence that it works.
What has been studied
- Acute sprain and strain swelling
- Minor pain relief
Current evidence label
Some evidence
Cold application is a standard first-aid measure for acute swelling and pain in the first day or two after a minor injury, recommended by mainstream health guidance alongside rest and elevation.
Safety
Safe when the cold source is wrapped in cloth; direct ice on skin for too long can cause frostbite or skin injury.
Avoid or use caution
- Never apply ice directly to bare skin — always wrap it
- Limit each application and check skin regularly
- Reduced circulation or numbness conditions — ask a clinician first
Medicine interactions
- None
Children
A wrapped cool compress is a routine comfort measure for children's bumps and fevers; supervise timing so skin isn't cooled too long.
Pregnancy and breastfeeding
Cool compresses are ordinary first aid with no special pregnancy concern.
How it was traditionally prepared
Cloth wrung out in cool water, or ice wrapped in a towel, held against the affected area.
Sources and further reading
- Sprains and strains — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Musculoskeletal / pain
Related remedies
Cordyceps
Ophiocordyceps sinensis / Cordyceps militaris
Limited / mixed evidenceA fungus long used in Traditional Chinese and Tibetan medicine, historically harvested from a fungus that grows on caterpillar larvae in high-altitude grasslands; most modern supplements use cultivated mycelium instead.
Herbs & BotanicalsTraditional AsianSerious safety warningGeneral NutritionOtherRead full entryClose entry
Cordyceps
Ophiocordyceps sinensis / Cordyceps militaris
Part used or form
Dried fungus (traditionally the wild fungus-caterpillar complex), or cultivated mycelium as capsules or powder
How it is used
By mouth
Also called
Cordyceps sinensis · Caterpillar fungus · Ophiocordyceps sinensis
Traditional / historical use
- A tonic for stamina, energy and recovery in Traditional Chinese and Tibetan medicine
- Traditional support for the lungs and kidneys in Chinese medicine theory
Historical use is not evidence that it works.
What has been studied
- Exercise performance and oxygen use in small athlete studies
- Fatigue and general wellbeing in small clinical trials
Current evidence label
Limited / mixed evidence
Small human trials on cultivated cordyceps have looked at exercise performance and fatigue with mixed and inconsistent results; larger, well-designed trials are lacking. Traditional stamina and tonic uses remain unproven in modern research.
Safety
Cultivated cordyceps supplements are generally reported as well tolerated in short studies, though wild-harvested cordyceps has occasionally been linked to heavy-metal contamination in testing, and rare allergic reactions have been reported.
Avoid or use caution
- Autoimmune conditions or immune-suppressing medicines — theoretical immune-stimulating effect
- Bleeding disorders or upcoming surgery
- Known mushroom or mold allergy
Medicine interactions
- May add to the effect of blood thinners
- May affect blood sugar, relevant alongside diabetes medicines
- Theoretical interaction with immune-suppressing medicines given after transplant
Children
Not established as safe for children; traditional use in this form is an adult tonic, not a children's remedy.
Pregnancy and breastfeeding
Safety in pregnancy and breastfeeding has not been established, so cordyceps supplements are best avoided in both.
How it was traditionally prepared
Historically the whole dried fungus-caterpillar body was simmered into soups or tonics; modern products use cultivated mycelium powder instead.
Sources and further reading
- Cordyceps — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Dietary and herbal supplements — what to know — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Respiratory · Musculoskeletal / pain · Immune / general wellness
Coriander / Cilantro
Coriandrum sativum
Traditional use — evidence not establishedOne plant with two culinary identities: the fresh leaf, called cilantro in much of the Americas, and the dried seed, called coriander, both used worldwide in cooking and traditional digestive remedies.
Herbs & BotanicalsTraditional AsianOther Traditional SystemsTraditional European / AmericanDigestionMetabolic/Blood SugarRead full entryClose entry
Coriander / Cilantro
Coriandrum sativum
Part used or form
Fresh leaf (cilantro) and dried seed (coriander)
How it is used
By mouth
Also called
Coriander seed · Cilantro leaf · Chinese parsley
Traditional / historical use
- Digestive complaints and gas
- Traditionally used to ease colic
- Folk 'cooling' remedy in some traditions
Historical use is not evidence that it works.
What has been studied
- Blood sugar (small studies)
- Digestive symptoms
- Antioxidant activity
Current evidence label
Traditional use — evidence not established
Coriander and cilantro are nutritious foods, and small preliminary studies suggest possible mild effects on blood sugar and digestion, but the clinical evidence is thin and mostly based on animal or lab studies.
Safety
Both forms are widely eaten as food and considered safe; some people find fresh cilantro tastes like soap due to a genetic trait, which is harmless. True allergy is uncommon but can occur.
Avoid or use caution
- Known allergy to the carrot/celery plant family
Medicine interactions
- May add to the effect of diabetes medicines
- May add to the effect of blood pressure medicines (seed extract)
Children
Coriander and cilantro are common foods in many family diets; concentrated seed extracts are not necessary for children. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
Pregnancy and breastfeeding
Culinary use is common in pregnancy; concentrated extracts should be discussed with a provider. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh leaves were traditionally used raw in dishes and chutneys; dried seeds were toasted, ground, and steeped in tea or added to cooking.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Corn Silk
Zea mays
Traditional use — evidence not establishedThe fine silky threads found inside an ear of corn, brewed as a traditional tea across several cultures as a mild diuretic for urinary discomfort.
Herbs & BotanicalsTraditional African / African DiasporaOther Traditional SystemsTraditional European / AmericanUrinaryRead full entryClose entry
Corn Silk
Zea mays
Part used or form
Dried silk (the fine threads inside a corn husk)
How it is used
By mouth
Also called
Zea mays silk · Stigma maydis
Traditional / historical use
- Mild urinary discomfort or fluid retention (folk use)
- Bedwetting (historical folk use)
Historical use is not evidence that it works.
What has been studied
- Diuretic effect and urinary symptoms (small, mostly older or animal studies)
Current evidence label
Traditional use — evidence not established
Corn silk has a long, cross-cultural folk history as a mild urinary tea, and a mild diuretic effect has been observed in limited studies, but there is not enough reliable human trial evidence to confirm a specific benefit.
Safety
Corn silk tea is generally considered low risk for most adults when made from food-grade corn. It should be used cautiously by anyone on medicines affected by fluid or potassium balance.
Avoid or use caution
- Diuretic medicines
- Low potassium
- Diabetes medicines
Medicine interactions
- May add to the effect of diuretic medicines
- May affect blood sugar in people on diabetes medicines
Children
Historically used in folk remedies for bedwetting, but this is not advised today without a pediatrician's guidance. Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh or dried silk was traditionally steeped as a simple tea after being separated from the husk and cob.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Urinary tract infections — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Cranberry
Vaccinium macrocarpon
Some evidenceA tart North American berry used by Native peoples as food and medicine, best known today for urinary health.
Foods & Kitchen RemediesTraditional European / AmericanSkinUrinaryRead full entryClose entry
Cranberry
Vaccinium macrocarpon
Part used or form
Fruit, juice, dried berries, extracts
Also called
American cranberry · Bearberry
Traditional / historical use
- Urinary complaints
- Wound care
- Food and preserves
Historical use is not evidence that it works.
What has been studied
- Preventing repeat urinary tract infections
- Treating a current UTI
Current evidence label
Some evidence
Cranberry products may help reduce repeat urinary tract infections in some people, particularly women with recurrent UTIs. Cranberry does not treat an existing infection — that needs medical care.
Safety
Cranberry as juice or food is generally safe. Large amounts of juice can upset the stomach, and concentrated products may matter for kidney stones.
Avoid or use caution
- A suspected urinary infection needs medical care, not juice alone
- History of kidney stones
- Diabetes — watch sugar in juices
Medicine interactions
- May interact with warfarin — reports are mixed but worth discussing
Children
Cranberry juice is a drink, not a treatment. A child with urinary pain, fever or blood in urine needs a doctor.
Pregnancy and breastfeeding
Juice in normal amounts is ordinary food. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Berries were mashed into poultices and mixed with dried meat historically; juice and capsules are modern forms.
Sources and further reading
- Cranberry — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Skin · Urinary
Cruciferous Vegetables
Brassica spp.
Limited / mixed evidenceThe cabbage family — broccoli, cauliflower, kale, Brussels sprouts, and relatives — a group of vegetables studied for a possible link to lower cancer risk.
Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianGeneral NutritionDigestionRead full entryClose entry
Cruciferous Vegetables
Brassica spp.
Part used or form
Vegetable — raw, steamed, roasted, or fermented
How it is used
By mouth
Also called
Broccoli · Cabbage family vegetables · Brassica vegetables · Cauliflower · Brussels sprouts · Kale
Traditional / historical use
- A vegetable family eaten worldwide, raw, cooked, or fermented
- Traditional preservation as sauerkraut and kimchi
Historical use is not evidence that it works.
What has been studied
- Cancer risk in population studies
- Overall diet quality
Current evidence label
Limited / mixed evidence
Population studies link diets higher in cruciferous and other vegetables to lower rates of some cancers, but this is observational evidence about overall eating patterns, not proof that any single vegetable prevents cancer in an individual. Health agencies recommend eating a variety of vegetables generally rather than relying on one food group.
Safety
Very low risk as food for most people. These vegetables are naturally high in vitamin K, which can matter for people on warfarin, and raw large amounts can affect people with thyroid conditions who are told to watch goitrogen intake.
Avoid or use caution
- Warfarin — keep vitamin K intake roughly consistent
- Known thyroid condition — ask a doctor about very large raw intakes
Medicine interactions
- High and inconsistent vitamin K intake can affect warfarin dosing — steady intake matters more than avoidance
- May be flagged by a doctor for people with thyroid disease being treated
Children
Ordinary vegetable food for children; no special restriction.
Pregnancy and breastfeeding
Ordinary and generally encouraged vegetable food during pregnancy.
How it was traditionally prepared
Eaten raw in salads and slaws, steamed, roasted, stir-fried, or fermented into sauerkraut and kimchi.
Sources and further reading
- Cancer — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Immune / general wellness
Related remedies
Cumin
Cuminum cyminum
Limited / mixed evidenceA warm, earthy seed central to South Asian, Middle Eastern and Latin American cooking, and a long-standing traditional digestive remedy.
Foods & Kitchen RemediesTraditional AsianOther Traditional SystemsDigestionMetabolic/Blood SugarRead full entryClose entry
Cumin
Cuminum cyminum
Part used or form
Dried seed, whole or ground
How it is used
By mouth
Also called
Jeera · Cumin seed
Traditional / historical use
- Digestive discomfort and bloating
- Appetite support
- Flavoring for curries, breads and spice blends
Historical use is not evidence that it works.
What has been studied
- Small trials looking at cumin extract and metabolic markers, with mixed and inconclusive results
Current evidence label
Limited / mixed evidence
Cumin has a long traditional reputation as a digestive aid, and a handful of small human trials have looked at cumin extracts for blood sugar or weight markers, but results are inconsistent and not enough to draw firm conclusions.
Safety
Ordinary amounts used to season food are considered safe for most people. Concentrated cumin supplements have not been well studied for safety.
Avoid or use caution
- Diabetes medicines, due to a possible additive blood-sugar effect
- Concentrated supplement forms
Medicine interactions
- May affect blood sugar-lowering medicines
Children
Fine as an ordinary food seasoning.
Pregnancy and breastfeeding
Ordinary culinary use is common. Concentrated supplements are not advised. Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract.
How it was traditionally prepared
Whole seeds toasted and ground, or used whole in tempering oil at the start of cooking.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
Cupping
Limited / mixed evidenceA practice in which cups are placed on the skin and suction is created, drawing the skin upward, leaving temporary circular bruising; found in Chinese medicine, Middle Eastern hijama and other traditions.
Mind-Body / Non-Drug PracticesTraditional AsianOther Traditional SystemsHigh caution — do not self-treatPainSkinRead full entryClose entry
Cupping
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Burns reported with fire cupping
- Infection risk with wet cupping and unsterile equipment
Part used or form
Suction cups placed on the skin, sometimes combined with small skin punctures (wet cupping)
How it is used
On the skin
Also called
Cupping therapy · Fire cupping · Hijama (wet cupping)
Traditional / historical use
- Muscle pain and stiffness
- Believed to draw out toxins or improve circulation within traditional systems
Historical use is not evidence that it works.
What has been studied
- Neck and back pain
- Muscle soreness
Current evidence label
Limited / mixed evidence
Small studies suggest cupping may modestly ease some kinds of muscle and back pain in the short term, but trials are often poorly designed and hard to blind, so effects beyond a placebo response are unclear.
Safety
Leaves temporary circular bruising and skin discoloration that can last days to weeks. Burns can occur with fire cupping, and wet cupping carries infection risk if skin is not properly disinfected or equipment is reused.
Avoid or use caution
- Bleeding disorders or blood-thinner use
- Skin infections, wounds or fragile/thin skin
- Use only a practitioner using sterile, single-use or properly sterilized equipment
Medicine interactions
- Bleeding risk matters with blood thinners
Children
Not well studied in children; the bruising and burn risks make it unsuitable without a clinician's guidance.
Pregnancy and breastfeeding
Avoid on or near the abdomen and lower back; ask a midwife or doctor before use in pregnancy.
Historical and cultural background
Documented across multiple traditional medicine systems for centuries; long use does not by itself establish that it works.
How it was traditionally prepared
Practised for centuries using heated glass, bamboo or animal-horn cups in Chinese, Middle Eastern and other traditional systems, and by modern suction-pump devices.
Sources and further reading
- Cupping — NIH NCCIHU.S. federal health source
- Burns — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Musculoskeletal / pain
Related remedies
Curry Leaf
Murraya koenigii
Traditional use — evidence not establishedThe aromatic leaf of a South Asian tree, fried in oil at the start of cooking for flavor and used in South Asian traditional medicine for digestive complaints.
Herbs & BotanicalsTraditional AsianDigestionRead full entryClose entry
Curry Leaf
Murraya koenigii
Part used or form
Fresh or dried leaf
How it is used
By mouth
Also called
Kadi patta · Murraya leaf
Traditional / historical use
- Digestive discomfort
- Traditional remedy for hair and skin care applied topically
- Flavoring for South Asian dishes
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Curry leaf has an established place in South Asian traditional medicine and cooking, but there is no substantial modern clinical research confirming a health benefit.
Safety
Ordinary amounts used to season food are considered safe for most people. There is little safety data on concentrated extracts.
Avoid or use caution
- Concentrated extract or supplement forms, which are not well studied
Children
Fine as an ordinary food seasoning.
Pregnancy and breastfeeding
Ordinary culinary use is common. Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract. for concentrated extracts.
How it was traditionally prepared
Fresh leaves fried briefly in hot oil with mustard seeds at the start of cooking lentils and vegetables.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Traditional medicine — fact sheet — World Health OrganizationInternational government / WHO / EMA
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Damask Rose Petal
Rosa damascena
Limited / mixed evidenceFragrant rose petals used across Middle Eastern, South Asian and European traditions as a calming tea, culinary flavoring, and skin-soothing rose water.
Teas & InfusionsOther Traditional SystemsTraditional European / AmericanStress/AnxietySkinDigestionRead full entryClose entry
Damask Rose Petal
Rosa damascena
Part used or form
Dried petals, brewed as tea, or distilled rose water
How it is used
By mouth
Also called
Rosa damascena · Rose water · Gulab
Traditional / historical use
- Mild stress or low mood (folk use)
- Digestive comfort
- Skin toning and soothing (rose water, topical)
Historical use is not evidence that it works.
What has been studied
- Mood and anxiety in a small number of trials of rose extracts or aromatherapy
Current evidence label
Limited / mixed evidence
Rose petal tea and rose water have long culinary and folk-medicine use, and a small number of trials on rose extracts or rose aromatherapy suggest possible mild calming effects, but the research base is small and preliminary.
Safety
Rose petal tea and food-grade rose water are widely consumed and generally considered safe for most people. Allergic skin reactions to topical rose water are possible but uncommon.
Avoid or use caution
- Known allergy to roses or related plants
Children
Culinary amounts of rose water are commonly used in some cuisines; ask a pediatrician before using rose petal tea or extracts as a remedy for a child.
Pregnancy and breastfeeding
Culinary use is generally considered fine; concentrated extracts have not been well studied in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Petals were traditionally dried for tea, distilled into rose water, or preserved in sugar and used in food and skin preparations.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Anxiety — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Damiana
Turnera diffusa
Traditional use — evidence not establishedA shrub native to Central America and Mexico, traditionally brewed as a tea and long marketed as an aphrodisiac and mood tonic.
Herbs & BotanicalsOther Traditional SystemsTraditional European / AmericanSerious safety warningStress/AnxietyOtherRead full entryClose entry
Damiana
Turnera diffusa
Part used or form
Dried leaf
How it is used
By mouth
Also called
Turnera diffusa · Mexican damiana
Traditional / historical use
- Low mood and mild nervousness
- Traditionally used as an aphrodisiac
- Digestive complaints
Historical use is not evidence that it works.
What has been studied
- Sexual function (mostly in combination products)
- Mood
Current evidence label
Traditional use — evidence not established
Human research on damiana alone is very limited. Most of what is sold as evidence comes from studies of multi-herb blends, so damiana's own effect cannot be separated out. Claims about it as an aphrodisiac are not backed by solid trials.
Safety
Occasional use as a tea is generally considered low risk for most healthy adults, but safety data are limited and high intakes have not been well studied.
Avoid or use caution
- Diabetes or blood sugar medicines
- People with a history of seizures, per some traditional cautions
Medicine interactions
- May add to the effect of diabetes medicines by lowering blood sugar
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditionally avoided in pregnancy. Ask a doctor or midwife before any use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried leaves steeped as a tea or infused into wine-based tonics.
Sources and further reading
- Damiana — MSK About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Reproductive / menstrual / menopause
Related remedies
Dance and Movement Practice
Some evidenceRhythmic movement to music, done for enjoyment or in a class setting, distinct from tai chi, qigong, or yoga as named systems of slow structured movement.
Mind-Body / Non-Drug PracticesTraditional African / African DiasporaTraditional European / AmericanOther Traditional SystemsStress/AnxietyHeart/CirculationRead full entryClose entry
Dance and Movement Practice
Part used or form
Rhythmic, music-accompanied movement, done recreationally or in a structured class
How it is used
Whole-body practice
Also called
Recreational dance for wellbeing · Dance movement therapy (informal)
Traditional / historical use
- Community and celebratory dance across many cultures
- Everyday enjoyment and social connection
Historical use is not evidence that it works.
What has been studied
- Mood and quality of life
- Balance and mobility in older adults
- Physical activity levels
Current evidence label
Some evidence
Studies of structured dance classes, including in older adults, suggest benefits for mood, balance, and physical activity levels comparable to other moderate exercise, though most trials are small and dance styles vary widely.
Safety
Low risk for most people at a comfortable pace and style. Vigorous dance carries the same joint and fall risks as other moderate-to-vigorous exercise.
Avoid or use caution
- Balance problems or fall risk — choose supported or seated dance formats
- Joint injuries — modify movements accordingly
Children
Generally low risk for children in a simplified, age-appropriate form, ideally introduced with an adult's guidance.
Pregnancy and breastfeeding
Generally considered safe in pregnancy; check with a prenatal care provider before starting anything new, especially if it involves new physical activity.
How it was traditionally prepared
Dance for community, celebration, and personal expression is documented across essentially every human culture; its use as a structured wellbeing activity is a more recent framing.
Sources and further reading
- Music and health — what you need to know — NIH NCCIHU.S. federal health source
- Exercise for older adults — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Mental health — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Musculoskeletal / pain · Cardiovascular
Related remedies
Dandelion
Taraxacum officinale
Traditional use — evidence not establishedThe common yard weed, eaten as a bitter green and brewed as a root coffee in many food traditions.
Herbs & BotanicalsTraditional European / AmericanTraditional African / African DiasporaDigestionCough/ColdMetabolic/Blood SugarRead full entryClose entry
Dandelion
Taraxacum officinale
Part used or form
Leaf, root and flower
Also called
Lion's tooth · Pissenlit · Blowball
Traditional / historical use
- Digestion and appetite
- Fluid retention
- Liver and 'spring cleansing' tonics
- Salad greens
Historical use is not evidence that it works.
What has been studied
- Digestive complaints
- Urine output
- Blood sugar
Current evidence label
Traditional use — evidence not established
Dandelion is a well-documented food, but there is very little human research on it as a medicine, so its medicinal effects are unproven.
Safety
Generally considered safe as a food. Allergic reactions are possible, especially with daisy-family allergies, and the sap can irritate skin.
Avoid or use caution
- Kidney problems
- Daisy family allergy
- Do not harvest from sprayed lawns or roadsides
Medicine interactions
- May add to the effect of diuretics ('water pills')
- May affect lithium levels
- May affect medicines processed by the liver
Children
Dandelion greens are a food; dandelion supplements are not a children's remedy.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Young leaves eaten raw or cooked; roots roasted and brewed as a coffee substitute; flowers made into wine and syrup.
Sources and further reading
- Dandelion — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Respiratory · Metabolic
Dandelion Tea
Taraxacum officinale
Limited / mixed evidenceA hot-water infusion made from dandelion leaf or a decoction of roasted root, used differently from raw dandelion greens eaten as a salad food.
Teas & InfusionsTraditional European / AmericanDigestionUrinaryRead full entryClose entry
Dandelion Tea
Taraxacum officinale
Part used or form
Dried leaf or roasted root, steeped or simmered as a hot-water infusion
How it is used
By mouth
Also called
Dandelion leaf or root infusion
Traditional / historical use
- Mild fluid retention ('water pill' folk use)
- Digestive bitters before meals
- Roasted-root brew as a coffee substitute
Historical use is not evidence that it works.
What has been studied
- Mild diuretic effect (small studies)
Current evidence label
Limited / mixed evidence
A few small human studies suggest dandelion leaf may have a short-term mild diuretic effect, but the evidence base is thin and root tea has essentially no dedicated clinical research of its own.
Safety
Generally considered low risk for most adults as an occasional beverage. People allergic to ragweed, daisies or marigolds can react to dandelion.
Avoid or use caution
- Allergy to ragweed-family plants
- Gallbladder disease or bile duct blockage
- People on diuretics or lithium
Medicine interactions
- May add to the effect of diuretics, lithium, or blood sugar and blood pressure medicines
Children
Herbal and specialty teas are not advised as a home remedy for infants and young children. Ask the child's doctor first, and keep any caffeine-containing tea away from young children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Leaves have traditionally been steeped as a light infusion, and the root roasted and simmered into a darker, coffee-like decoction.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Dietary supplements — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Urinary
Related remedies
Dates
Phoenix dactylifera
Limited / mixed evidenceA naturally very sweet fruit, most commonly eaten dried, that provides fibre and potassium along with a substantial amount of natural sugar.
Foods & Kitchen RemediesOther Traditional SystemsTraditional AsianDigestionMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Dates
Phoenix dactylifera
Part used or form
Dried or fresh fruit
How it is used
By mouth
Also called
Date fruit · Medjool dates · Deglet noor dates
Traditional / historical use
- A traditional staple food and fast-breaking food in parts of the Middle East and North Africa
- Traditionally eaten in late pregnancy in some Middle Eastern and North African cultures
Historical use is not evidence that it works.
What has been studied
- Fibre and potassium intake as part of overall diet
- Small studies on date consumption in late pregnancy and labor characteristics
Current evidence label
Limited / mixed evidence
Dates are a concentrated source of natural sugar, fibre and potassium. Some small studies have looked at whether eating dates in the last weeks of pregnancy is associated with differences in labor, but the research is limited in size and quality, so this remains a traditional practice rather than an established recommendation, and dates should not be treated as a way to induce or shorten labor.
Safety
Safe as food for most people in ordinary amounts, but dates are very high in natural sugar and calories per piece compared with fresh fruit, which matters for diabetes and weight management.
Avoid or use caution
- Diabetes or blood sugar management, given the concentrated natural sugar content
- Weight management goals, due to calorie density
Medicine interactions
- High natural sugar content is relevant for people managing diabetes or blood sugar
Children
Dates are sticky and chewy, which can be a choking hazard for young children; chop finely or offer as a puree, and remove the pit.
Pregnancy and breastfeeding
Ordinary amounts of dates as food are considered fine in pregnancy. Some traditional practice includes eating dates in late pregnancy, but the evidence for any effect on labor is limited, and dates are not a substitute for a birth plan discussed with a maternity care provider.
How it was traditionally prepared
Eaten dried as a snack, stuffed with nuts, blended into energy balls or syrups.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Potassium — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Diabetes — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic · Reproductive / menstrual / menopause
Related remedies
Devil's Claw
Harpagophytum procumbens
Limited / mixed evidenceA tuberous plant from the Kalahari region of southern Africa, named for its claw-shaped fruit, traditionally used for pain and digestive complaints.
Herbs & BotanicalsOther Traditional SystemsPainInflammationRead full entryClose entry
Devil's Claw
Harpagophytum procumbens
Part used or form
Dried tuber
How it is used
By mouth
Also called
Grapple plant · Wood spider · Harpagophytum
Traditional / historical use
- Joint and back discomfort
- Digestive complaints
- Fevers
Historical use is not evidence that it works.
What has been studied
- Osteoarthritis pain
- Low back pain
Current evidence label
Limited / mixed evidence
Some clinical trials suggest devil's claw may modestly ease joint and back pain over weeks of use, but studies vary in quality and dose, so the evidence is not considered conclusive.
Safety
Generally used short-term. Digestive upset is the most common complaint. It may affect stomach acid and blood clotting.
Avoid or use caution
- Stomach or duodenal ulcers
- Gallstones
- People on blood thinners
Medicine interactions
- May increase the effect of blood-thinning medicines
- May interfere with acid-reducing medicines
- May affect blood sugar or heart medicines, per some sources
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditionally avoided in pregnancy. Ask a doctor or midwife before any use during pregnancy or breastfeeding.
Historical and cultural background
Documented for generations among peoples of the Kalahari Desert region of southern Africa as a folk remedy for pain and fever before entering European herbal markets in the 20th century.
How it was traditionally prepared
Dried, sliced tuber simmered into a decoction or ground for capsules and tablets.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Arthritis — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Dietary Fiber
Stronger evidenceThe part of plant food the body does not digest — the backbone of traditional diets and of modern advice on digestion and heart health.
Foods & Kitchen RemediesTraditional African / African DiasporaTraditional AsianTraditional European / AmericanDigestionSkinHeart/CirculationMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Dietary Fiber
Part used or form
Whole grains, beans, fruit, vegetables, seeds
Also called
Roughage · Whole grains · Bran · Psyllium
Traditional / historical use
- Regular digestion
- Staple foods: beans, greens, grains
- Fullness
Historical use is not evidence that it works.
What has been studied
- Constipation
- Cholesterol
- Blood sugar
- Heart disease risk
- Bowel health
Current evidence label
Stronger evidence
Fibre-rich eating patterns are well supported for digestion, cholesterol and long-term heart and bowel health. This is nutrition advice, not treatment for a specific illness.
Safety
Adding fibre quickly causes gas, bloating and cramping; add it gradually and drink more fluid.
Avoid or use caution
- Bowel narrowing or obstruction
- Take medicines apart from large fibre doses
- Increase fluids alongside fibre
Medicine interactions
- Can reduce absorption of medicines taken at the same time — separate them by a couple of hours
Children
Fibre-rich foods are ordinary family food. Fibre supplements for children need a doctor's advice.
Pregnancy and breastfeeding
Fibre-rich food is generally encouraged; ask a midwife about persistent constipation.
How it was traditionally prepared
Beans, greens, whole grains and root vegetables have carried the fibre load of traditional diets worldwide.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Constipation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Related concerns
Body systems: Digestive · Skin · Cardiovascular · Metabolic · Immune / general wellness
Dill
Anethum graveolens
Limited / mixed evidenceA feathery culinary herb whose leaf and seed have long been used across European and Middle Eastern kitchens and folk medicine to ease gas and infant colic.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsDigestionRead full entryClose entry
Dill
Anethum graveolens
Part used or form
Fresh or dried leaf ('dill weed') and seed
How it is used
By mouth
Also called
Anethum graveolens · Dill weed · Dill seed
Traditional / historical use
- Indigestion and gas
- Infant colic (as gripe water, historical folk use)
- Mild appetite support
Historical use is not evidence that it works.
What has been studied
- Infant colic (small trials of dill-containing preparations, mixed results)
Current evidence label
Limited / mixed evidence
Dill has a long culinary and folk-medicine history for digestive comfort, and small trials of dill-containing gripe water-type preparations for infant colic show mixed results that are not strong enough to be conclusive.
Safety
Dill used as a culinary herb is very safe for most people. Giving any herbal preparation, including commercial gripe water, to an infant should be discussed with the infant's pediatrician first, since infant dosing and product quality vary.
Avoid or use caution
- Allergy to carrot, celery or related plants
Medicine interactions
- May add to the effect of blood sugar-lowering medicines (theoretical, at concentrated doses)
Children
Culinary dill is fine as food. Dill-based gripe water or concentrated extracts for infant colic should only be used after checking with the infant's pediatrician; this library gives no amounts.
Pregnancy and breastfeeding
Culinary use is considered safe; concentrated seed extracts have not been well studied in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh or dried leaf and seed were traditionally used in cooking, brewed as a mild tea, or distilled into 'dill water' historically given for infant gas.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Indigestion — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Dill Seed
Anethum graveolens
Traditional use — evidence not establishedA common kitchen herb whose dried seeds have long been chewed or brewed into tea for an unsettled stomach and to help infants with colic-like fussiness.
Herbs & BotanicalsTraditional European / AmericanOther Traditional SystemsSerious safety warningDigestionRead full entryClose entry
Dill Seed
Anethum graveolens
Part used or form
Dried seed
How it is used
By mouth
Also called
Dill · Anethum graveolens seed
Traditional / historical use
- Upset stomach and gas
- Infant colic (as a mild household tea for the caregiver or very dilute preparations)
- Freshening breath after meals
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Dill seed has not been well studied on its own in clinical trials. Its traditional reputation as a digestive aid comes mostly from long culinary and folk use rather than controlled research.
Safety
As a culinary spice and mild tea, dill seed is generally considered safe for most adults. Concentrated extracts or essential oil are a different matter and have not been shown safe to swallow.
Avoid or use caution
- Diabetes medicines
- Bleeding disorders or blood thinners
- Known allergy to related plants (carrot, celery, mugwort family)
Medicine interactions
- May add to the effect of blood-sugar-lowering medicines
- May add to the effect of blood-thinning medicines
Children
Culinary use in food is common, but concentrated dill preparations or essential oil are not advised for infants or young children without a pediatrician's guidance.
Pregnancy and breastfeeding
Ordinary culinary use is considered common; concentrated extracts have not been well studied. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried seeds were traditionally steeped as a tea or chewed whole after meals.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Indigestion — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Dong Quai
Angelica sinensis
Evidence against / not recommendedA root long used in traditional Chinese medicine, often called 'female ginseng' and typically combined with other herbs for menstrual and menopausal complaints.
Herbs & BotanicalsTraditional AsianHigh caution — do not self-treatMenstrual/MenopauseHeart/CirculationRead full entryClose entry
Dong Quai
Angelica sinensis
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Bleeding risk with blood-thinning medicines
Part used or form
Dried root
How it is used
By mouth
Also called
Angelica sinensis · Female ginseng · Dang gui
Traditional / historical use
- Menstrual complaints
- Menopausal symptoms
- General 'blood tonic' use
Historical use is not evidence that it works.
What has been studied
- Menopausal hot flashes
- Menstrual symptoms
Current evidence label
Evidence against / not recommended
Clinical trials of dong quai alone, including for hot flashes, have not shown it works better than placebo. It is almost always used in traditional formulas alongside other herbs, which makes its individual effect hard to judge.
Safety
Can increase sun sensitivity and affect bleeding risk. Should not be combined with blood thinners.
Avoid or use caution
- Bleeding disorders
- Before and after surgery
- Estrogen-sensitive conditions, per some sources
- Sun sensitivity
Medicine interactions
- May increase the effect of blood-thinning medicines such as warfarin
- May interact with other hormone-sensitive therapies
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditionally avoided in pregnancy due to possible effects on the uterus. Ask a doctor or midwife first; do not use to attempt to start or stop a pregnancy.
How it was traditionally prepared
Dried root sliced and simmered into decoctions or soups, or combined into herbal formula blends.
Sources and further reading
- Dong Quai — MSK About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Menopause — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Menstruation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Reproductive / menstrual / menopause
Related remedies
Dried Fruit (General)
Some evidenceA general entry covering fruit preserved by drying: convenient and fibre-rich, but with sugar and calories concentrated compared with the fresh fruit it came from.
Foods & Kitchen RemediesOther Traditional SystemsTraditional European / AmericanTraditional AsianDigestionGeneral NutritionMetabolic/Blood SugarRead full entryClose entry
Dried Fruit (General)
Part used or form
Any fruit dried for preservation (raisins, dried apricots, dates, figs, prunes and similar)
How it is used
By mouth
Also called
Dehydrated fruit · Trail mix fruit
Traditional / historical use
- Long-term food preservation across virtually every culinary tradition
- Portable food for travel, trade and military rations historically
Historical use is not evidence that it works.
What has been studied
- Fibre intake from dried fruit as part of overall diet
- Comparisons of dried versus fresh fruit sugar density and dental effects
Current evidence label
Some evidence
Drying fruit removes water and concentrates its natural sugar, fibre and calories into a much smaller volume, so a handful of dried fruit provides more sugar and calories than the equivalent fresh fruit. General nutrition guidance treats dried fruit as a legitimate way to get some of the same fibre and nutrients as fresh fruit, while noting portion size matters more because it is easy to eat a concentrated amount quickly.
Safety
Safe as food for most people in ordinary amounts. The concentrated sugar sticks to teeth more than fresh fruit, raising cavity risk, and some dried fruit is treated with sulfites, which can trigger a reaction in people who are sulfite-sensitive.
Avoid or use caution
- Sulfite sensitivity — some dried fruit (especially apricots and some raisins) is treated with sulfites and labeled accordingly
- Sticky dried fruit sugar increases dental cavity risk with frequent snacking
Medicine interactions
- People managing diabetes should be aware dried fruit is more concentrated in sugar than fresh fruit
Children
Chewy dried fruit such as whole dried apricots or large raisin clusters can be a choking hazard for young children; chop finely and offer in small amounts, and encourage a rinse or brushing afterward because of the sugar's stickiness on teeth.
Pregnancy and breastfeeding
Ordinary amounts of dried fruit as a snack are fine in pregnancy; keep portions modest given its concentrated sugar and calories.
How it was traditionally prepared
Preserved by sun-drying or dehydration, historically one of the oldest food-preservation methods.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Carbohydrates — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
Echinacea
Echinacea purpurea and related species
Limited / mixed evidenceA prairie coneflower used widely by Native American nations and later the most popular cold remedy in the American herb trade.
Herbs & BotanicalsTraditional European / AmericanCough/ColdSore ThroatSkinRead full entryClose entry
Echinacea
Echinacea purpurea and related species
Part used or form
Root, leaf and flower
Also called
Purple coneflower · American coneflower · Snakeroot
Traditional / historical use
- Wounds and snakebite
- Sore throat
- Colds and infections
Historical use is not evidence that it works.
What has been studied
- Preventing colds
- Shortening colds
- Upper respiratory infections
Current evidence label
Limited / mixed evidence
Echinacea has been studied many times for colds. Overall, it has not been clearly shown to prevent colds, and any effect on how long a cold lasts appears small at best.
Safety
Short-term use is generally well tolerated; rash and digestive upset occur. Allergic reactions, sometimes serious, are possible in people allergic to daisy-family plants.
Avoid or use caution
- Daisy family allergy or asthma with allergies
- Autoimmune conditions
- After an organ transplant
Medicine interactions
- May affect medicines that suppress the immune system
- May affect medicines processed by the liver
Children
Studies in children have not shown clear benefit, and rash was more common. Ask a doctor before giving it to a child.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Roots were chewed, poulticed onto wounds, or made into decoctions and tinctures.
Sources and further reading
- Echinacea — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory · Skin
Eggs
Some evidenceA widely eaten whole food valued in nutrition guidance as a source of complete protein, choline and several vitamins and minerals.
Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianTraditional African / African DiasporaOther Traditional SystemsSerious safety warningGeneral NutritionHeart/CirculationRead full entryClose entry
Eggs
Part used or form
Whole egg, cooked
How it is used
By mouth
Also called
Chicken eggs
Traditional / historical use
- An everyday staple food across nearly every culinary tradition
Historical use is not evidence that it works.
What has been studied
- Dietary cholesterol and blood cholesterol and heart disease risk
- Protein intake as part of an overall diet
Current evidence label
Some evidence
Current general nutrition guidance no longer sets a strict daily limit on dietary cholesterol from eggs for most healthy people, viewing overall dietary pattern as more important than egg intake alone, though people with certain heart disease risk factors may still be advised individually on egg intake. Eggs are a well-documented source of complete protein and several vitamins.
Safety
Eggs are one of the most common food allergens, especially in young children, though many children outgrow it. Raw or undercooked eggs carry a Salmonella food-poisoning risk, which is the reason well-cooked eggs are recommended for young children, older adults, pregnant people and anyone immunocompromised.
Avoid or use caution
- Known egg allergy — avoid
- Raw or undercooked eggs — Salmonella risk, particularly for young children, pregnant people, older adults and anyone immunocompromised
Children
Well-cooked egg is a common and appropriate early food for infants and children without an egg allergy; raw or runny egg preparations should be avoided for young children because of Salmonella risk.
Pregnancy and breastfeeding
Well-cooked eggs are an ordinary, nutritious food during pregnancy; raw or undercooked eggs (such as in some homemade dressings or raw batter) are generally advised against because of Salmonella risk.
How it was traditionally prepared
Boiled, fried, scrambled, poached or baked into countless dishes across nearly every cuisine.
Sources and further reading
- Dietary proteins — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Food allergy — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- How to lower cholesterol with diet — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Foodborne illness — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Metabolic · Immune / general wellness
Related remedies
Elderberry
Sambucus nigra
Limited / mixed evidenceA hedgerow tree whose cooked berries and flowers have been made into syrups, cordials and wines across Europe for centuries.
Herbs & BotanicalsTraditional European / AmericanCough/ColdRead full entryClose entry
Elderberry
Sambucus nigra
Part used or form
Ripe cooked berries and flowers
Also called
Black elder · European elder · Sambucus
Traditional / historical use
- Colds and flu
- Fever
- Cough
- Syrups, jams and cordials
Historical use is not evidence that it works.
What has been studied
- Cold and flu symptoms and duration
Current evidence label
Limited / mixed evidence
A few small studies suggest elderberry preparations might shorten cold or flu symptoms, but the studies are small and not strong enough to be conclusive.
Safety
Cooked ripe berries and commercial syrups are generally well tolerated. Raw or unripe berries, leaves, bark and seeds contain compounds that can cause nausea, vomiting and diarrhoea.
Avoid or use caution
- Never eat raw or unripe elderberries, leaves or bark
- Autoimmune conditions
- Do not delay care for a high or lasting fever
Medicine interactions
- May affect medicines that suppress the immune system
- May affect diuretics and diabetes medicines
Children
Do not give any cough or cold product to a young child without a doctor's guidance, and never give honey-containing syrups to a baby under 1 year.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Berries were cooked into syrup, wine and jam; flowers were steeped as tea or made into cordial.
Sources and further reading
- Elderberry — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory
Elderflower
Sambucus nigra (flower)
Traditional use — evidence not establishedThe small cream-colored flowers of the elder tree, distinct from the berries used in elderberry syrup, traditionally brewed as a tea for colds and fevers.
Teas & InfusionsTraditional European / AmericanCough/ColdRead full entryClose entry
Elderflower
Sambucus nigra (flower)
Part used or form
Dried flower, brewed as a tea
How it is used
By mouth
Also called
Elder blossom · Sambucus flower
Traditional / historical use
- Colds and fevers
- Sinus and nasal congestion
- Traditional 'sweating' tea for early cold symptoms
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Elderflower is often combined with other herbs in European cold remedies, but there is little dedicated clinical research on the flower alone, separate from elderberry.
Safety
Elderflower tea, properly dried and prepared, is widely consumed and generally considered low risk for adults. Raw or unripe parts of the elder plant more broadly can cause stomach upset, which is why properly prepared, dried flower products are used.
Avoid or use caution
- Use only properly dried, commercially prepared flowers rather than raw plant material
Medicine interactions
- May add to the effect of diuretic medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditional tea has long culinary history, but it has not been rigorously studied in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried flower clusters were traditionally steeped as a hot tea at the first sign of a cold.
Sources and further reading
- Common cold — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Respiratory · Immune / general wellness
Related remedies
Elderflower Tea
Sambucus nigra
Traditional use — evidence not establishedA floral infusion made from the dried flowers of the elder tree, traditionally distinct from elderberry syrup, which is made from the ripe berries.
Teas & InfusionsTraditional European / AmericanCough/ColdRead full entryClose entry
Elderflower Tea
Sambucus nigra
Part used or form
Dried flower clusters steeped as a hot-water infusion
How it is used
By mouth
Also called
Sambucus flower infusion
Traditional / historical use
- Colds and mild fevers ('to bring out a sweat')
- Seasonal nasal and sinus discomfort
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Most modern research on elder has focused on elderberry extract for colds and flu, not on brewed elderflower tea, so there is little direct clinical evidence for the flower infusion itself.
Safety
Brewed elderflower tea made from properly dried, prepared flowers is widely used as a beverage and generally considered low risk. Raw or unripe elder plant parts (leaves, stems, unripe berries) contain compounds that can cause nausea and vomiting, so only properly prepared flower or berry products should be used.
Avoid or use caution
- Do not use raw leaves, stems, bark or unripe berries
- Diabetes medicines (theoretical additive effect)
Medicine interactions
- May have a mild additive effect with diuretics or diabetes medicines
Children
Herbal and specialty teas are not advised as a home remedy for infants and young children. Ask the child's doctor first, and keep any caffeine-containing tea away from young children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried flower clusters have traditionally been steeped in hot water and strained before drinking, sometimes sweetened with honey.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Dietary supplements — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Respiratory · Immune / general wellness
Related remedies
Eleuthero
Eleutherococcus senticosus
Limited / mixed evidenceA woody shrub used in Russian and East Asian traditions as a general 'adaptogen' tonic, historically marketed as Siberian ginseng despite being a different plant from true ginseng.
Herbs & BotanicalsTraditional AsianStress/AnxietyOtherRead full entryClose entry
Eleuthero
Eleutherococcus senticosus
Part used or form
Dried root
How it is used
By mouth
Also called
Siberian ginseng · Eleutherococcus
Traditional / historical use
- General fatigue and low stamina
- Supporting resistance to stress
- General wellness tonic
Historical use is not evidence that it works.
What has been studied
- Fatigue
- Physical performance and endurance
Current evidence label
Limited / mixed evidence
Small studies on eleuthero for fatigue and stamina exist but are limited in size and quality, so it is not possible to say with confidence how much it helps.
Safety
Short-term use appears reasonably well tolerated by most healthy adults. It is not the same plant as Panax (true) ginseng, and the two should not be assumed to share the same safety profile.
Avoid or use caution
- High blood pressure
- Diabetes
- Hormone-sensitive conditions
- Autoimmune conditions
Medicine interactions
- May affect blood sugar
- May affect blood pressure
- May interact with sedative medicines
- May affect how the liver processes some drugs
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally the dried root was simmered into a decoction or steeped as a tonic tea.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary supplements — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Immune / general wellness
Related remedies
Enoki Mushroom
Flammulina velutipes
Traditional use — evidence not establishedA slender, long-stemmed mushroom common in East Asian cooking, best known in food-safety news for outbreaks linked to Listeria contamination in packaged product.
Foods & Kitchen RemediesTraditional AsianHigh caution — do not self-treatGeneral NutritionOtherRead full entryClose entry
Enoki Mushroom
Flammulina velutipes
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Linked to Listeria outbreaks and recalls in packaged fresh/frozen product
Part used or form
Fresh, long, thin-stemmed fruiting bodies, cooked as food
How it is used
By mouth
Also called
Flammulina velutipes · Golden needle mushroom · Enokitake
Traditional / historical use
- A common vegetable-like ingredient in Japanese, Korean and Chinese soups, hot pots and salads
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Enoki has not been studied as a medicinal supplement; interest in it is culinary rather than health-claim driven, and no specific therapeutic use is established.
Safety
Cooked enoki is ordinarily safe, but fresh and frozen packaged enoki has been linked to real Listeria monocytogenes outbreaks and recalls in several countries, which is dangerous in pregnancy, older adults and anyone with a weakened immune system. Thorough cooking and checking for recalls reduces this risk.
Avoid or use caution
- Recalled or contaminated packaged enoki — check current food-safety recalls before eating
- Eating undercooked or raw enoki, especially during pregnancy or with a weakened immune system
Children
Should be well cooked before serving to children, and any recalled packages should never be used.
Pregnancy and breastfeeding
Pregnant people are at higher risk of serious illness from Listeria; enoki should be thoroughly cooked and never eaten from a recalled batch during pregnancy.
How it was traditionally prepared
Traditionally added raw-trimmed but always cooked into hot pots, soups, and stir-fries in East Asian cuisines.
Sources and further reading
- Foodborne illness — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Food safety — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Ephedra
Ephedra sinica
Evidence against / not recommendedA stimulant plant used in traditional Chinese medicine for wheezing and colds, later sold for weight loss and energy — and then banned in U.S. supplements.
Herbs & BotanicalsTraditional AsianHigh caution — do not self-treatCough/ColdHeart/CirculationMetabolic/Blood SugarRead full entryClose entry
Ephedra
Ephedra sinica
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
Part used or form
Dried stems
Also called
Ma huang · Ephedrine-containing ephedra
Traditional / historical use
- Wheezing and congestion
- Colds and fever
- Short-term stimulation
Historical use is not evidence that it works.
What has been studied
- Weight loss
- Athletic performance
- Nasal congestion
Current evidence label
Evidence against / not recommended
Ephedrine-containing ephedra supplements produced only modest short-term weight loss while carrying serious cardiovascular risk. The FDA banned their sale in the United States in 2004.
Safety
Linked to heart attack, stroke, seizure, dangerously high blood pressure and death. Ephedrine-alkaloid dietary supplements are illegal to sell in the U.S.
Avoid or use caution
- Do not use ephedra supplements — they are banned in the U.S.
- Treat any product promising ephedra-like effects with suspicion
Medicine interactions
- Dangerous with other stimulants including caffeine
- Dangerous with MAOI antidepressants
- Interacts with heart and blood-pressure medicines
Children
Never give ephedra products to a child.
Pregnancy and breastfeeding
Do not use in pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally used as a short-course decoction within Chinese herbal formulas, prescribed by a practitioner rather than taken daily.
Sources and further reading
- Ephedra — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Dietary supplements — regulation and safety — U.S. Food and Drug AdministrationU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory · Cardiovascular · Metabolic
Epsom Salt Soak
Traditional use — evidence not establishedA warm bath with magnesium sulfate (Epsom salt) dissolved in it, used for soaking sore muscles or minor skin complaints, distinct from swallowing magnesium sulfate, which is a medical laxative preparation.
Topical / SkinTraditional European / AmericanPainSkinRead full entryClose entry
Epsom Salt Soak
Part used or form
Magnesium sulfate crystals dissolved in warm bathwater
How it is used
On the skin — warm-water soak
Also called
Magnesium sulfate bath soak
Traditional / historical use
- Soothing sore muscles after exercise
- Soaking minor skin irritation
- General relaxation before sleep
Historical use is not evidence that it works.
What has been studied
- Whether magnesium is meaningfully absorbed through skin during a soak (research does not support significant absorption)
Current evidence label
Traditional use — evidence not established
The relaxing feel of a warm soak is well established, but there is little solid evidence that magnesium from Epsom salt is absorbed through skin in amounts that meaningfully raise body magnesium levels, so specific muscle-recovery claims remain unproven.
Safety
A warm soak with dissolved Epsom salt is low risk for most people. Water that is too hot can cause burns or dizziness, and open wounds or broken skin should not be soaked.
Avoid or use caution
- Open wounds or broken skin
- Very hot water in pregnancy or with heart conditions
- Diabetic neuropathy (reduced ability to sense water temperature)
Children
Keep bathwater comfortably warm, not hot, and supervise closely; ask a pediatrician for infants.
Pregnancy and breastfeeding
Warm, not hot, soaks are generally considered fine; avoid very hot water and prolonged soaking. Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Magnesium sulfate crystals, mined near Epsom, England, have traditionally been dissolved in warm bathwater for soaking.
Sources and further reading
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Pain — complementary approaches — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Musculoskeletal / pain
Related remedies
Eucalyptus Leaf
Eucalyptus globulus
Traditional use — evidence not establishedThe dried leaf of the eucalyptus tree, traditionally brewed as a mild tea or added to steam for chest colds — a different preparation from concentrated eucalyptus essential oil.
Teas & InfusionsTraditional European / AmericanOther Traditional SystemsCough/ColdSore ThroatRead full entryClose entry
Eucalyptus Leaf
Eucalyptus globulus
Part used or form
Dried leaf, brewed as a tea or inhaled as steam
How it is used
By mouth
Also called
Eucalyptus tea · Gum tree leaf
Traditional / historical use
- Chest congestion
- Cough
- Sore throat
- Steam inhalation for stuffy nose
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Most clinical research on eucalyptus involves its extracted oil or oil-based lozenges rather than the plain leaf tea, so dedicated studies on brewed eucalyptus leaf are lacking.
Safety
A dilute leaf tea, taken occasionally, is generally considered low risk for adults. Concentrated eucalyptus essential oil is a very different, much more concentrated product that is unsafe to swallow, especially by children.
Avoid or use caution
- Do not confuse with concentrated eucalyptus essential oil
- Liver conditions
Medicine interactions
- May affect how the liver processes some medicines
Children
A very weak leaf tea has been used traditionally, but eucalyptus essential oil is dangerous if swallowed by a child and steam inhalation should be supervised to avoid burns.
Pregnancy and breastfeeding
Traditional culinary-strength tea in moderation is generally viewed as lower-risk than concentrated oil, but data are limited. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried leaves were traditionally steeped as a tea or added to hot water for steam inhalation.
Sources and further reading
- Common cold — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Cough — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Respiratory
Related remedies
Eucalyptus Oil
Eucalyptus globulus
Limited / mixed evidenceA sharp, camphor-like oil from eucalyptus leaves, inhaled as steam or diluted into chest rubs for cold and sinus comfort.
Oils & AromaticsOther Traditional SystemsTraditional European / AmericanHigh caution — do not self-treatCough/ColdRead full entryClose entry
Eucalyptus Oil
Eucalyptus globulus
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Poisonous if swallowed; has caused seizures and breathing problems in young children from accidental ingestion
Part used or form
Essential oil, diluted for skin use or inhaled as vapor
How it is used
Inhaled
Also called
Eucalyptus essential oil · Eucalyptus rub
Traditional / historical use
- Congestion comfort
- Chest rubs
- Steam inhalation for colds
Historical use is not evidence that it works.
What has been studied
- Cold symptom comfort (as an ingredient in combination rubs)
Current evidence label
Limited / mixed evidence
Eucalyptus oil is a common ingredient in commercial vapor rubs and lozenges; evidence for the pure oil by itself is limited, and most study is on combination products rather than the plant oil alone.
Safety
For diluted skin use or inhaled steam only. Never swallowed — eucalyptus oil is toxic if ingested, and has caused serious poisoning in young children even in small amounts.
Avoid or use caution
- Never swallow eucalyptus oil
- Always dilute before applying to skin
- Never apply near the face of an infant or young child
- Keep bottles locked away from children — accidental swallowing is a medical emergency
Medicine interactions
- None well documented for topical or inhaled use
Children
Keep eucalyptus oil away from children entirely; do not apply near an infant's or toddler's face, and treat any suspected swallowing as an emergency.
Pregnancy and breastfeeding
Diluted topical or inhaled use in adults is commonly tolerated; ask a clinician about regular use in pregnancy.
How it was traditionally prepared
Leaves steam-distilled into oil, historically added to steam inhalations, chest rubs and diluted skin preparations.
Sources and further reading
- How to treat the common cold at home — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Respiratory · Skin
Related remedies
European Mistletoe
Viscum album
Limited / mixed evidenceA plant that grows on tree branches, wrapped in European folklore, and used in some European clinics as an injected cancer-care extract.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningPainRead full entryClose entry
European Mistletoe
Viscum album
Part used or form
Leafy shoots and berries of a tree parasite
Also called
Mistletoe · Viscum
Traditional / historical use
- Seizures and headache in folk practice
- Ritual and seasonal customs
Historical use is not evidence that it works.
What has been studied
- Quality of life during cancer treatment
- Cancer treatment itself
Current evidence label
Limited / mixed evidence
Mistletoe extracts have been studied in cancer care, mostly in Europe. Evidence that they improve survival is weak; some studies report quality-of-life effects. Mistletoe is not an approved cancer treatment in the United States.
Safety
Injected extracts used under supervision can cause soreness, fever and flu-like symptoms. Eating raw mistletoe, especially berries, can be poisonous.
Avoid or use caution
- Do not eat mistletoe berries or leaves
- Never replace cancer treatment with mistletoe
- Use only under a qualified clinician
Medicine interactions
- May affect immune-suppressing and cancer medicines
Children
Mistletoe is poisonous if eaten. Keep holiday decorations away from children.
Pregnancy and breastfeeding
Not recommended. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Folk use involved teas and tinctures; modern use is standardised injectable extracts given by clinicians.
Sources and further reading
- European mistletoe — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Musculoskeletal / pain
Evening Primrose Oil
Oenothera biennis
Limited / mixed evidenceSeed oil from a North American wildflower, used by Native peoples and now sold for skin conditions and women's health.
Oils & AromaticsTraditional European / AmericanSerious safety warningSore ThroatPainInflammationSkinMenstrual/MenopauseRead full entryClose entry
Evening Primrose Oil
Oenothera biennis
Part used or form
Oil pressed from the seeds
Also called
EPO · King's cure-all
Traditional / historical use
- Bruises and wounds
- Skin complaints
- Sore throat
Historical use is not evidence that it works.
What has been studied
- Eczema
- Breast pain
- Premenstrual syndrome
- Menopause symptoms
- Rheumatoid arthritis
Current evidence label
Limited / mixed evidence
Reviews of evening primrose oil for eczema have generally not found a benefit over placebo, and evidence for other uses is limited or mixed.
Safety
Usually mild side effects such as stomach upset and headache.
Avoid or use caution
- Bleeding disorders
- Before surgery
- Seizure disorders — ask a doctor
Medicine interactions
- May increase bleeding risk with blood thinners
- May interact with some medicines for mental health conditions (phenothiazines)
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a midwife or doctor; it is sometimes discouraged in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
The whole plant was poulticed traditionally; pressed seed oil in capsules is the modern form.
Sources and further reading
- Evening primrose oil — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory · Skin · Musculoskeletal / pain · Reproductive / menstrual / menopause
Expressive Writing / Journaling
Some evidenceA structured practice of writing privately and honestly about difficult experiences or feelings, studied under names like 'expressive writing' as a distinct psychological technique.
Mind-Body / Non-Drug PracticesTraditional European / AmericanStress/AnxietyRead full entryClose entry
Expressive Writing / Journaling
Part used or form
Structured private writing about thoughts and feelings, typically for a short session over a few days
How it is used
Whole-body practice — a seated writing exercise
Also called
Therapeutic journaling · Written emotional disclosure
Traditional / historical use
- Personal diary-keeping and reflection across many cultures
Historical use is not evidence that it works.
What has been studied
- Coping with stress and difficult life events
- Mood after emotionally difficult experiences
- Some markers of physical health in research settings
Current evidence label
Some evidence
A substantial body of psychology research on structured 'expressive writing' finds modest benefits for mood and coping after stressful or traumatic experiences for some people, though effects are inconsistent across studies and it is not a substitute for treatment of significant mental health conditions.
Safety
Very low physical risk. Writing about difficult or traumatic material can be emotionally intense in the short term for some people, so pacing and stopping if it becomes overwhelming matters.
Avoid or use caution
- Active trauma symptoms — consider doing this with a therapist's guidance rather than alone
- Stop if writing sessions consistently worsen distress
Children
Generally low risk for children in a simplified, age-appropriate form, ideally introduced with an adult's guidance.
Pregnancy and breastfeeding
Generally considered safe as a reflective practice at any stage of pregnancy.
How it was traditionally prepared
Modern expressive-writing research protocols were developed by psychologists in the late 20th century, building on long traditions of personal diary and reflective writing.
Sources and further reading
- Stress — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Mental health — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Mind and body practices — overview — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep
Extra Virgin Olive Oil
Olea europaea (fruit oil)
Some evidenceThe signature fat of the Mediterranean diet, one of the most consistently studied whole foods for heart health.
Foods & Kitchen RemediesOther Traditional SystemsTraditional European / AmericanHeart/CirculationGeneral NutritionRead full entryClose entry
Extra Virgin Olive Oil
Olea europaea (fruit oil)
Part used or form
Pressed fruit oil, used for cooking or drizzled raw
How it is used
By mouth
Also called
EVOO · Cold-pressed olive oil
Traditional / historical use
- Cooking and dressing fat across the Mediterranean for millennia
- Bread dipping and preserving food
Historical use is not evidence that it works.
What has been studied
- Blood cholesterol
- Cardiovascular disease risk as part of a Mediterranean-style diet
Current evidence label
Some evidence
Olive oil is high in monounsaturated fat, and health agencies describe replacing saturated fats (like butter) with monounsaturated and polyunsaturated oils, including olive oil, as a way to improve cholesterol as part of the overall diet. The strongest evidence comes from whole dietary patterns like the Mediterranean diet, not olive oil taken alone as a supplement.
Safety
Very low risk as a cooking and food oil. It is still a fat and calorie-dense, so total amount matters for weight management; heating oils past their smoke point repeatedly is a general cooking-quality issue, not specific to olive oil.
Avoid or use caution
- Weight-management goals — oil is calorie-dense even though the fat type is favorable
Children
Ordinary cooking fat for children.
Pregnancy and breastfeeding
Ordinary cooking fat.
How it was traditionally prepared
Pressed from olives and used raw as a dressing or dip, or for cooking and roasting.
Sources and further reading
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- How to lower cholesterol with diet — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Cholesterol — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Fatty Fish (Omega-3 Food Sources)
Some evidenceCold-water fish naturally rich in omega-3 fats, recommended by health agencies as a food source of omega-3 as an alternative to supplements for most adults.
Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianOther Traditional SystemsSerious safety warningHeart/CirculationGeneral NutritionRead full entryClose entry
Fatty Fish (Omega-3 Food Sources)
Part used or form
Fish flesh — such as salmon, sardines, mackerel, or trout — cooked or, in some cuisines, cured or raw
How it is used
By mouth
Also called
Oily fish · Salmon · Sardines · Mackerel · Fish oil food sources
Traditional / historical use
- A dietary staple in coastal and fishing cultures worldwide
Historical use is not evidence that it works.
What has been studied
- Heart disease risk
- Blood triglycerides
- Blood pressure in some studies
Current evidence label
Some evidence
Eating fish, particularly fattier fish, is linked in health agency guidance to lower cardiovascular risk, largely credited to their omega-3 fat content. This is one of the more consistent food-based findings in nutrition research, though it describes a dietary pattern rather than a treatment for existing heart disease.
Safety
Certain fish accumulate mercury, and public health guidance advises pregnant people, those who may become pregnant, breastfeeding people, and young children to choose lower-mercury fish and to limit or avoid higher-mercury species; a doctor or public health fish-advisory list is the right place to check which fish that includes. Fish is also a common food allergen, and raw or undercooked fish carries the usual food-safety risks of parasites and bacteria.
Avoid or use caution
- Pregnancy, breastfeeding, and young children — follow public health advice on choosing lower-mercury fish
- Fish or shellfish allergy
- Raw or undercooked fish — food-safety risk, and higher caution in pregnancy and for young children
Medicine interactions
- High intake alongside fish-oil supplements or blood thinners may add to bleeding risk
Children
Cooked, lower-mercury fish is a recommended part of a healthy diet for children; raw fish and higher-mercury species need more caution, and a pediatrician or public health fish-advisory guidance can help with specifics.
Pregnancy and breastfeeding
Fish is encouraged during pregnancy as a source of omega-3s important for the baby's development, but public health agencies advise choosing lower-mercury fish and avoiding raw or undercooked fish. A prenatal care provider can point to current local fish-advisory guidance.
How it was traditionally prepared
Grilled, baked, smoked, cured, canned, or in some traditions eaten raw or lightly cured.
Sources and further reading
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- How to lower cholesterol with diet — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular
Related remedies
Fennel
Foeniculum vulgare
Limited / mixed evidenceAn aromatic, licorice-scented seed used as both a kitchen spice and a traditional after-meal digestive aid across many cuisines.
Herbs & BotanicalsTraditional European / AmericanOther Traditional SystemsTraditional AsianDigestionMenstrual/MenopauseRead full entryClose entry
Fennel
Foeniculum vulgare
Part used or form
Seeds
How it is used
By mouth
Also called
Foeniculum vulgare · Sweet fennel
Traditional / historical use
- Gas and bloating
- Digestive complaints
- Chewed after meals for breath and digestion
Historical use is not evidence that it works.
What has been studied
- Infant colic (as part of combination products)
- Menstrual cramps
- Digestive symptoms
Current evidence label
Limited / mixed evidence
Small studies suggest fennel preparations may ease bloating and menstrual cramping for some people, but trials are small and not conclusive. Most colic research used combination products rather than fennel alone.
Safety
Fennel used as a food spice is very well tolerated. Concentrated fennel supplements and essential oil are less studied and carry more caution, especially for hormone-sensitive conditions.
Avoid or use caution
- Hormone-sensitive cancers or conditions, for concentrated extracts
- Allergy to carrot, celery or mugwort family plants
Medicine interactions
- May affect estrogen-sensitive conditions, per some sources
- May interact with blood-thinning or diabetes medicines in concentrated form
Children
Fennel used as a cooking spice is a food. Concentrated fennel products or fennel water for infant colic should only be used on a pediatrician's advice; this library gives no amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Seeds chewed whole after meals, brewed as a tea, or used whole and ground as a cooking spice.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Indigestion — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Fennel Tea
Foeniculum vulgare
Limited / mixed evidenceA licorice-scented seed steeped into tea, a traditional after-meal drink across the Mediterranean and South Asia for digestive comfort.
Teas & InfusionsTraditional European / AmericanOther Traditional SystemsTraditional AsianDigestionRead full entryClose entry
Fennel Tea
Foeniculum vulgare
Part used or form
Crushed or whole seeds steeped in hot water
How it is used
By mouth
Also called
Fennel seed tea
Traditional / historical use
- Gas and bloating
- After-meal digestive comfort
- Traditionally offered to nursing mothers
Historical use is not evidence that it works.
What has been studied
- Infant colic (as an extract, under medical guidance)
- Digestive discomfort
Current evidence label
Limited / mixed evidence
Fennel is traditionally used for digestive comfort, and some small studies of fennel extracts (not home tea) have looked at colic and digestive symptoms, with mixed results.
Safety
Generally safe as an occasional beverage in adults; fennel contains plant compounds with mild estrogen-like activity, which is a caution for some people.
Avoid or use caution
- Hormone-sensitive conditions (e.g., certain breast or uterine conditions) — ask a doctor
- Known allergy to carrot/celery/mugwort family plants
Medicine interactions
- May interact with hormone-sensitive conditions or hormone medicines
Children
Fennel tea for infant colic should only be used with a pediatrician's guidance, not as an unsupervised home remedy.
Pregnancy and breastfeeding
Occasional culinary use is common, but concentrated fennel preparations are generally advised against in pregnancy without medical guidance.
How it was traditionally prepared
Seeds crushed lightly and steeped in hot water, or chewed whole after meals.
Sources and further reading
- Indigestion — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Fenugreek
Trigonella foenum-graecum
Limited / mixed evidenceA maple-scented seed used in South Asian, North African and Middle Eastern cooking, and traditionally linked to milk supply and blood sugar.
Foods & Kitchen RemediesTraditional AsianTraditional African / African DiasporaSerious safety warningPainSkinMenstrual/MenopauseMetabolic/Blood SugarRead full entryClose entry
Fenugreek
Trigonella foenum-graecum
Part used or form
Seeds and leaves
Also called
Methi · Greek hay
Traditional / historical use
- Digestive complaints
- Breast-milk supply
- Blood sugar
- Cooking spice
Historical use is not evidence that it works.
What has been studied
- Diabetes and blood sugar
- Breast-milk production
- Menstrual cramps
Current evidence label
Limited / mixed evidence
Small studies of fenugreek for blood sugar and milk supply have given mixed results; nothing is well established.
Safety
Common in food and generally well tolerated there. Supplements can cause digestive upset and a maple-syrup body odour; allergic reactions are possible, especially with peanut or chickpea allergy.
Avoid or use caution
- Peanut or legume allergy
- Diabetes
- Before surgery
Medicine interactions
- May affect blood sugar with diabetes medicines
- May increase bleeding risk with blood thinners
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Supplement doses are generally discouraged in pregnancy; food amounts are ordinary. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Seeds are toasted or soaked in cooking; leaves eaten as a vegetable; seeds also brewed as tea.
Sources and further reading
- Fenugreek — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Skin · Musculoskeletal / pain · Metabolic · Reproductive / menstrual / menopause
Fermented Foods
Limited / mixed evidenceAn umbrella term for foods preserved by beneficial microbes — yogurt, kefir, sauerkraut, kimchi, miso, and others — traditions found on every inhabited continent, now studied together as a source of live cultures.
Foods & Kitchen RemediesTraditional AsianTraditional European / AmericanTraditional African / African DiasporaOther Traditional SystemsDigestionGeneral NutritionRead full entryClose entry
Fermented Foods
Part used or form
Foods preserved by microbial fermentation — vegetables, dairy, soy, grains, and more, across cultures
How it is used
By mouth
Also called
Cultured foods · Fermented vegetables
Traditional / historical use
- Food preservation before refrigeration
- Traditional gut and general health tonics across many cultures
Historical use is not evidence that it works.
What has been studied
- Gut bacteria composition
- Digestive comfort
- Immune-related outcomes in some trials
Current evidence label
Limited / mixed evidence
NIH sources describe some strains of live microbes in fermented foods and probiotic supplements as having modest, strain-specific effects on digestive symptoms and gut bacteria, while noting effects vary a great deal by food, strain, and person, and are not established for most other conditions people hope they will help.
Safety
Fermented foods are generally safe for healthy people. Many traditional fermented vegetables (like sauerkraut and kimchi) are high in sodium, which matters for blood pressure. People who are severely immunocompromised (for example, during chemotherapy, after a transplant, or with advanced HIV) should ask their doctor before eating foods with live active cultures, since rare infections from food-borne organisms have been reported in this group.
Avoid or use caution
- Severely immunocompromised — ask a doctor first
- High blood pressure — check sodium content of fermented vegetables and sauces
- MAOI antidepressants — ask about tyramine-containing fermented foods
Medicine interactions
- Fermented soy and some fermented foods contain tyramine, which can interact with certain older antidepressant medicines (MAOIs)
Children
Common fermented foods like yogurt are ordinary food for children; highly salted fermented vegetables should be given in modest amounts because of sodium.
Pregnancy and breastfeeding
Most well-prepared fermented foods are considered safe in pregnancy; unpasteurized products carry the same general food-safety cautions as other unpasteurized foods, which a prenatal provider can clarify.
How it was traditionally prepared
Vegetables, milk, soy, grains, and fish are salted or cultured and left to ferment over days to months, a technique used for preservation long before refrigeration.
Sources and further reading
- Probiotics — what you need to know — NIH NCCIHU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Immune / general wellness
Related remedies
Feverfew
Tanacetum parthenium
Limited / mixed evidenceA small daisy-like plant used in European folk practice for fevers and headaches, now mostly taken for migraine.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningPainInflammationMenstrual/MenopauseRead full entryClose entry
Feverfew
Tanacetum parthenium
Part used or form
Dried leaves
Also called
Bachelor's buttons · Featherfew
Traditional / historical use
- Fever
- Headache
- Menstrual cramps
- Arthritis
Historical use is not evidence that it works.
What has been studied
- Migraine prevention
- Rheumatoid arthritis
Current evidence label
Limited / mixed evidence
Studies of feverfew for preventing migraine have been mixed, with some suggesting a small benefit and others none; the evidence is not conclusive.
Safety
Can cause mouth ulcers and digestive upset when leaves are chewed. Stopping suddenly after long use has been reported to cause rebound headache.
Avoid or use caution
- Daisy family allergy
- Blood-thinner use
- Before surgery
Medicine interactions
- May increase bleeding risk with blood thinners
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh leaves were chewed or eaten in bread; dried leaf capsules are modern.
Sources and further reading
- Feverfew — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Musculoskeletal / pain · Reproductive / menstrual / menopause
Figs
Ficus carica
Some evidenceAn ancient Mediterranean and Middle Eastern fruit, eaten fresh or dried, valued for fibre and, when dried, concentrated natural sugars and minerals.
Foods & Kitchen RemediesOther Traditional SystemsTraditional European / AmericanDigestionGeneral NutritionRead full entryClose entry
Figs
Ficus carica
Part used or form
Fresh or dried fruit
How it is used
By mouth
Also called
Fig · Fresh figs · Dried figs
Traditional / historical use
- Everyday eating, fresh or dried
- A traditional mild food for constipation in Mediterranean and Middle Eastern folk practice
Historical use is not evidence that it works.
What has been studied
- Dietary fibre intake and bowel regularity
Current evidence label
Some evidence
Figs, especially dried figs, are a concentrated source of dietary fibre, which is why they are traditionally eaten to help with regularity — an effect consistent with general fibre research rather than something unique to figs. Dried figs also concentrate sugar and calories compared with fresh fruit.
Safety
Safe as food for most people. Dried figs are calorie- and sugar-dense compared with fresh figs, which matters for blood sugar management, and their small seeds and chewy texture can be a choking consideration for very young children.
Avoid or use caution
- Dried figs are concentrated in natural sugar, relevant for people managing diabetes or watching calories
Children
Fresh, ripe fig cut into small pieces is fine for most children; dried figs are chewy and should be cut small or softened for young children to reduce choking risk.
Pregnancy and breastfeeding
Ordinary food during pregnancy with no established restriction.
How it was traditionally prepared
Eaten fresh in season, dried for year-round use, or cooked into preserves and baked goods.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Constipation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
Flaxseed / Flaxseed Oil
Linum usitatissimum
Some evidenceOne of the oldest cultivated crops, grown for fibre and food; the ground seed is a well-known source of fibre and omega-3 fat.
Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianSerious safety warningDigestionCough/ColdSore ThroatSkinMenstrual/MenopauseHeart/CirculationMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Flaxseed / Flaxseed Oil
Linum usitatissimum
Part used or form
Whole or ground seed, and pressed seed oil
Also called
Linseed · Linseed oil · Alsi
Traditional / historical use
- Constipation
- Cough and sore throat
- Poultices for skin
- Everyday food
Historical use is not evidence that it works.
What has been studied
- Constipation
- Cholesterol
- Blood pressure
- Hot flashes
- Blood sugar
Current evidence label
Some evidence
Flaxseed is a genuine source of dietary fibre and may modestly help constipation and cholesterol. Evidence for hot flashes and other uses is weaker and mixed.
Safety
Well tolerated as a food; extra fibre can cause gas and bloating and needs plenty of fluid. Raw or unripe seed should not be eaten in large amounts.
Avoid or use caution
- Bowel obstruction or narrowing
- Take medicines at a different time from a big fibre dose
- Drink enough water with added fibre
Medicine interactions
- Fibre can slow absorption of medicines taken at the same time
- May increase bleeding risk with blood thinners (oil)
- May affect blood sugar and blood pressure medicines
Children
Ground flaxseed in food is ordinary food. Do not treat a child's constipation with supplements without asking a doctor.
Pregnancy and breastfeeding
Food amounts are ordinary; supplement doses are less studied. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Seeds were ground into meal, boiled into gruel, and made into warm poultices; the oil was pressed for food and lamps.
Sources and further reading
- Flaxseed and flaxseed oil — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Respiratory · Skin · Cardiovascular · Metabolic · Reproductive / menstrual / menopause · Immune / general wellness
Fluids and Hydration
Stronger evidenceDrinking enough fluid — water, broth, warm drinks — is the single most universal home measure across every healing tradition.
Foods & Kitchen RemediesTraditional African / African DiasporaTraditional AsianTraditional European / AmericanOther Traditional SystemsDigestionNauseaCough/ColdPainSkinRead full entryClose entry
Fluids and Hydration
Part used or form
Water, broth, warm drinks, oral rehydration solution
Also called
Drinking water · Warm broth · Clear liquids
Traditional / historical use
- Fevers and colds
- Vomiting and diarrhoea
- Headache
- Hot weather and hard work
Historical use is not evidence that it works.
What has been studied
- Rehydration during illness
- Symptom comfort during colds
Current evidence label
Stronger evidence
Replacing fluids during illness, heat or exertion is well-established medical care, and oral rehydration is one of the most effective public-health measures ever adopted. Fluids do not cure infections.
Safety
Fluids are essential, but heart, kidney and liver conditions can require fluid limits, and drinking extreme amounts of plain water very quickly is dangerous.
Avoid or use caution
- Heart, kidney or liver disease with fluid restrictions
- Signs of dehydration in a baby, young child or older adult need urgent care
- Ongoing vomiting or diarrhoea needs medical advice, not water alone
Medicine interactions
- Fluid limits set by a doctor for heart, kidney or liver conditions must be followed
Children
Dehydration is dangerous in babies and young children. Ask a doctor or pharmacist about oral rehydration solution rather than guessing.
Pregnancy and breastfeeding
Fluids are important; ask a midwife if vomiting stops you keeping liquids down.
How it was traditionally prepared
Broths, thin gruels, herbal infusions and rice water have served as sick-day fluids across cultures.
Sources and further reading
- Fluid and electrolyte balance — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- How to treat the common cold at home — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Related concerns
Body systems: Digestive · Respiratory · Skin · Musculoskeletal / pain
Fo-Ti
Reynoutria multiflora (syn. Polygonum multiflorum)
Safety concernA root long used in traditional Chinese medicine as a longevity and hair-darkening tonic, sold today as a supplement despite documented reports of serious liver injury.
Herbs & BotanicalsTraditional AsianHigh caution — do not self-treatOtherRead full entryClose entry
Fo-Ti
Reynoutria multiflora (syn. Polygonum multiflorum)
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Liver injury reported
Part used or form
Processed dried root
How it is used
By mouth
Also called
He Shou Wu · Polygonum multiflorum
Traditional / historical use
- Traditional longevity and vitality tonic
- Traditional use for premature graying of hair
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Safety concern
There is no solid clinical evidence supporting fo-ti's traditional claims, and modern attention has focused mainly on safety rather than benefit.
Safety
Case reports and LiverTox data describe fo-ti (particularly raw or improperly processed root) as associated with serious liver injury in some users, ranging from mild enzyme elevations to acute hepatitis.
Avoid or use caution
- Any liver condition
- Use of other liver-affecting medicines or supplements
- Heavy alcohol use
Medicine interactions
- May affect how the liver processes other medicines
- Should not be combined with other supplements or medicines known to stress the liver
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally the root was repeatedly steamed and dried with black bean juice before use in decoctions; unprocessed raw root was considered more likely to cause digestive upset.
Sources and further reading
- LiverTox — herbal and dietary supplements section — NIH NIDDK / NCBI BookshelfU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Traditional Chinese medicine — what you need to know — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Immune / general wellness
Related remedies
Forest Bathing / Time in Nature
Limited / mixed evidenceSpending slow, attentive time in a natural setting — popularized in Japan as shinrin-yoku ('forest bathing') — for relaxation and stress relief.
Mind-Body / Non-Drug PracticesTraditional AsianOther Traditional SystemsStress/AnxietyOtherRead full entryClose entry
Forest Bathing / Time in Nature
Part used or form
Unhurried, mindful time spent walking or sitting in a natural, wooded setting
How it is used
Whole-body practice — spending unhurried time outdoors
Also called
Shinrin-yoku · Nature therapy · Green exercise
Traditional / historical use
- Relaxation
- Stress relief
- Connection to nature
Historical use is not evidence that it works.
What has been studied
- Stress markers
- Mood
- Blood pressure (short-term)
Current evidence label
Limited / mixed evidence
There is no dedicated NCCIH page on forest bathing specifically. Small studies, mostly from Japan and Korea, report short-term reductions in stress hormones, blood pressure and self-reported mood after time in forested settings compared with urban settings, but many trials are small, short and not tightly controlled, so the size and durability of any effect beyond general outdoor exercise is unclear.
Safety
Very low risk. Ordinary outdoor hazards apply — weather exposure, insect bites, uneven terrain and, in some regions, ticks or wildlife.
Avoid or use caution
- Severe pollen or plant allergies — plan around symptoms
- Extreme heat, cold or weather warnings
- Check for ticks after time in wooded or grassy areas in regions where tick-borne illness occurs
Children
Time outdoors is broadly encouraged for children; supervise near water, wildlife or uneven terrain.
Pregnancy and breastfeeding
Generally considered safe; take usual precautions with sun exposure, hydration and uneven terrain.
Historical and cultural background
Draws on Japanese cultural traditions of nature appreciation; the modern wellness term is a 1980s public-health initiative rather than an ancient therapy.
How it was traditionally prepared
The term shinrin-yoku was coined by Japan's forestry agency in the 1980s to promote wellbeing benefits of forest visits, building on longstanding cultural appreciation of nature in Japanese tradition.
Sources and further reading
- Stress — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Anxiety — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Cardiovascular
Related remedies
Galangal
Alpinia galanga
Traditional use — evidence not establishedA ginger-family rhizome widely used in Southeast Asian cooking and traditional medicine, valued for a sharp, peppery flavor and a traditional reputation as a digestive warming spice.
Herbs & BotanicalsTraditional AsianSerious safety warningDigestionNauseaRead full entryClose entry
Galangal
Alpinia galanga
Part used or form
Fresh or dried rhizome
How it is used
By mouth
Also called
Thai ginger · Laos root
Traditional / historical use
- Digestive upset and gas
- Nausea
- General 'warming' tonic in traditional systems
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Galangal is closely related to ginger, but it has not been well studied on its own in human clinical trials, so its traditional digestive reputation remains unconfirmed by research.
Safety
Used as a culinary spice, galangal is generally considered safe for most people. Concentrated supplement extracts have not been well studied for safety.
Avoid or use caution
- Bleeding disorders
- Planned surgery
Medicine interactions
- May add to the effect of blood-thinning medicines, similar to other ginger-family plants
Children
Ordinary culinary use in cooked food is common; concentrated extracts are not advised for children.
Pregnancy and breastfeeding
Ordinary culinary use is generally viewed as low risk; concentrated extracts have not been well studied. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh or dried rhizome was traditionally sliced into broths, curries, or steeped as a warming tea.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Traditional medicine — fact sheet — World Health OrganizationInternational government / WHO / EMA
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Garcinia Cambogia
Garcinia gummi-gutta
Limited / mixed evidenceA South Asian fruit whose dried rind is used as a souring agent in cooking, heavily marketed since the 2000s for weight loss.
Herbs & BotanicalsTraditional AsianSerious safety warningHeart/CirculationMetabolic/Blood SugarRead full entryClose entry
Garcinia Cambogia
Garcinia gummi-gutta
Part used or form
Fruit rind
Also called
Malabar tamarind · Brindleberry · HCA
Traditional / historical use
- Souring agent in curries
- Digestive complaints
Historical use is not evidence that it works.
What has been studied
- Weight loss
- Cholesterol
- Athletic performance
Current evidence label
Limited / mixed evidence
Studies of garcinia for weight loss show little or no meaningful effect, and the popular marketing claims go far beyond the research.
Safety
Digestive upset and headache are reported, and there have been cases of liver injury linked to garcinia-containing weight-loss products.
Avoid or use caution
- Liver disease
- Weight-loss blends with multiple stimulant ingredients
- Stop and seek care for yellowing skin, dark urine or unusual tiredness
Medicine interactions
- May affect blood sugar with diabetes medicines
- May interact with medicines affecting serotonin
- May add to liver strain from other products
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
The rind was sun-dried and simmered in food; concentrated extracts are modern.
Sources and further reading
- Garcinia cambogia — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Dietary supplements — regulation and safety — U.S. Food and Drug AdministrationU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Cardiovascular · Metabolic
Gardening and Horticultural Activity
Limited / mixed evidenceHands-on gardening and plant care, valued both for the physical activity involved and for time spent focused outdoors, distinct from simply spending time in nature without an activity.
Mind-Body / Non-Drug PracticesTraditional European / AmericanOther Traditional SystemsStress/AnxietyRead full entryClose entry
Gardening and Horticultural Activity
Part used or form
Hands-on plant care and outdoor garden work, done regularly
How it is used
Whole-body practice
Also called
Horticultural therapy (informal) · Therapeutic gardening
Traditional / historical use
- Household food growing across most cultures
- Community and therapeutic garden programs
Historical use is not evidence that it works.
What has been studied
- Mood and stress
- Light-to-moderate physical activity levels
- Some studies in dementia care and rehabilitation settings
Current evidence label
Limited / mixed evidence
Studies of gardening programs, including formal 'horticultural therapy,' suggest benefits for mood, stress, and physical activity, but the research base is made up mostly of small and varied studies rather than large controlled trials.
Safety
Low risk overall. Practical hazards include soil-borne organisms (wash hands and wear gloves), tool and lifting injuries, sun exposure, and insect stings, which are ordinary outdoor-activity precautions rather than a property of gardening as a 'remedy.'
Avoid or use caution
- Immune-compromised individuals should ask about soil and plant-material precautions
- Use sun protection and stay hydrated in hot weather
- Lift carefully with back or joint problems
Children
Gardening is commonly enjoyed by children with supervision around tools and hand hygiene after handling soil.
Pregnancy and breastfeeding
Generally considered safe with ordinary precautions; avoid heavy lifting and be mindful of exposure to soil, pesticides, or extreme heat. Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Gardening as both a food-growing necessity and a source of personal enjoyment is documented throughout recorded history across cultures.
Sources and further reading
- Mental health — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Stress — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Mind and body practices — overview — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Musculoskeletal / pain
Related remedies
Garlic
Allium sativum
Limited / mixed evidenceA kitchen staple on every continent, used as both food and medicine for thousands of years.
Foods & Kitchen RemediesTraditional African / African DiasporaTraditional AsianTraditional European / AmericanSerious safety warningDigestionCough/ColdSkinHeart/CirculationRead full entryClose entry
Garlic
Allium sativum
Part used or form
Bulb — raw, cooked, aged or as extract
Also called
Allium · Aged garlic extract
Traditional / historical use
- Colds and infections
- Heart and circulation
- Digestion
- Everyday cooking
Historical use is not evidence that it works.
What has been studied
- Cholesterol
- Blood pressure
- Common cold
- Cancer prevention
Current evidence label
Limited / mixed evidence
Garlic may have small effects on cholesterol and blood pressure, but results vary between studies and the benefits are modest, not a substitute for treatment.
Safety
Garlic in food is generally safe. Raw garlic can cause heartburn, body odour and, applied to skin, chemical burns. Supplements may increase bleeding risk.
Avoid or use caution
- Before surgery or dental procedures
- Blood-thinner use
- Do not tape raw garlic to skin — it can burn
Medicine interactions
- May increase bleeding risk with warfarin and other blood thinners
- Can reduce blood levels of some HIV medicines (saquinavir)
- May affect blood sugar and blood pressure medicines
Children
Garlic in food is fine for most children; garlic supplements are not a children's remedy.
Pregnancy and breastfeeding
Food amounts are ordinary; supplement doses are less studied. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Crushed raw in honey or vinegar, roasted whole, simmered in broths, or aged for months in the Japanese tradition.
Sources and further reading
- Garlic — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Mixing medications and dietary supplements can endanger your health — U.S. Food and Drug AdministrationU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Respiratory · Skin · Cardiovascular
Gentian
Gentiana lutea
Traditional use — evidence not establishedA very bitter European mountain root, traditionally used in small amounts before meals to stimulate appetite and digestion, and the classic 'bitter' in many herbal tonics.
Herbs & BotanicalsTraditional European / AmericanDigestionRead full entryClose entry
Gentian
Gentiana lutea
Part used or form
Dried root
How it is used
By mouth
Also called
Gentiana lutea · Yellow gentian · Bitter root
Traditional / historical use
- Loss of appetite
- Sluggish digestion
- Base ingredient in traditional bitters
Historical use is not evidence that it works.
What has been studied
- Digestive complaints
- Appetite stimulation
Current evidence label
Traditional use — evidence not established
Gentian's bitter taste is thought to stimulate digestive secretions, but there are few well-designed human trials confirming meaningful benefit for any condition.
Safety
Generally considered safe in the small amounts typically used in bitters and traditional tonics. High intakes can cause nausea or headache.
Avoid or use caution
- Stomach ulcers
- High blood pressure, per some traditional cautions
Medicine interactions
- Limited data; use caution combining with other digestive or blood pressure medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditionally avoided in pregnancy. Ask a doctor or midwife before any use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried root steeped in alcohol or water to make bitter tonics, or brewed as a strong tea taken before meals.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Indigestion — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Ginger
Zingiber officinale
Some evidenceA warm, pungent rhizome traded worldwide for millennia, used for nausea, digestion and cooking in almost every cuisine.
Foods & Kitchen RemediesTraditional AsianTraditional African / African DiasporaTraditional European / AmericanSerious safety warningDigestionNauseaCough/ColdPainInflammationSkinMenstrual/MenopauseRead full entryClose entry
Ginger
Zingiber officinale
Part used or form
Rhizome — fresh, dried, candied or as tea
Also called
Ginger root · Adrak · Zingiber
Traditional / historical use
- Nausea and travel sickness
- Upset stomach and gas
- Colds
- Menstrual cramps
Historical use is not evidence that it works.
What has been studied
- Nausea in pregnancy
- Post-operative and chemotherapy nausea
- Osteoarthritis
- Menstrual pain
Current evidence label
Some evidence
Ginger is among the better-supported traditional remedies for nausea, including nausea in pregnancy, though results differ by situation. Evidence for joint pain and other uses is weaker.
Safety
Generally safe in food amounts; heartburn, gas and mouth irritation are the usual complaints. Concentrated supplements are less well studied.
Avoid or use caution
- Blood-thinner use
- Gallstones — ask a doctor
- Before surgery
Medicine interactions
- May increase bleeding risk with blood thinners
- May affect blood sugar and blood pressure medicines
Children
Ginger tea is a common household drink. Persistent vomiting in a child needs medical care, not home remedies alone.
Pregnancy and breastfeeding
Often used for morning sickness and generally considered acceptable in food amounts, but confirm with a midwife or doctor first.
How it was traditionally prepared
Sliced fresh into hot water as tea, grated into food, candied in sugar, or dried and powdered for spice mixes.
Sources and further reading
- Ginger — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Respiratory · Skin · Musculoskeletal / pain · Reproductive / menstrual / menopause
Ginger Tea
Zingiber officinale
Some evidenceSliced ginger in hot water — the most widespread home drink for nausea and queasiness in the world.
Teas & InfusionsTraditional AsianTraditional African / African DiasporaTraditional European / AmericanSerious safety warningNauseaCough/ColdPainMenstrual/MenopauseRead full entryClose entry
Ginger Tea
Zingiber officinale
Part used or form
Sliced fresh or dried rhizome steeped in hot water
Also called
Ginger water · Fresh ginger infusion
Traditional / historical use
- Nausea
- Upset stomach
- Colds and chills
- Menstrual cramps
Historical use is not evidence that it works.
What has been studied
- Nausea in pregnancy
- Motion sickness
- Nausea after surgery or chemotherapy
Current evidence label
Some evidence
Ginger has reasonable evidence for nausea, including nausea in pregnancy. Most studies used ginger preparations rather than home-brewed tea, so effects from a cup will vary.
Safety
Low risk in food amounts; heartburn and mouth irritation are the usual complaints.
Avoid or use caution
- Blood-thinner use
- Gallstones
- Before surgery
Medicine interactions
- May increase bleeding risk with blood thinners
- May affect blood sugar and blood pressure
Children
A weak ginger drink is common household practice, but a vomiting child needs medical advice about fluids first.
Pregnancy and breastfeeding
Frequently used for morning sickness and generally considered acceptable, but confirm with a midwife or doctor.
How it was traditionally prepared
Fresh slices simmered or steeped, often with honey, lemon or lime.
Sources and further reading
- Ginger — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- How to treat the common cold at home — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Related concerns
Body systems: Digestive · Respiratory · Musculoskeletal / pain · Reproductive / menstrual / menopause
Ginkgo
Ginkgo biloba
Limited / mixed evidenceThe leaf of an ancient Chinese tree, sold widely for memory and circulation.
Herbs & BotanicalsTraditional AsianSerious safety warningPainHeart/CirculationRead full entryClose entry
Ginkgo
Ginkgo biloba
Part used or form
Leaf extract; the seed is used separately in cooking
Also called
Ginkgo biloba · Maidenhair tree · Bai guo
Traditional / historical use
- Asthma and wheezing
- Circulation
- Memory in later life
Historical use is not evidence that it works.
What has been studied
- Dementia prevention
- Memory in healthy adults
- Leg pain from poor circulation
- Tinnitus
Current evidence label
Limited / mixed evidence
Large trials, including a long U.S. study, did not find that ginkgo prevents dementia or memory decline. Other uses have not been convincingly shown either.
Safety
Headache, digestive upset and dizziness are reported. Bleeding events, including bleeding in the brain, have been reported. Raw or roasted ginkgo seeds can be toxic.
Avoid or use caution
- Bleeding disorders or blood-thinner use
- Seizure disorders
- Before surgery
- Do not eat raw ginkgo seeds
Medicine interactions
- May increase bleeding risk with blood thinners such as warfarin and aspirin
- May interact with seizure medicines
- May affect several medicines processed by the liver
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children. Ginkgo seeds can be toxic to children.
Pregnancy and breastfeeding
Not recommended in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Leaves were used in traditional Chinese preparations and seeds cooked as food; standardised leaf extracts are modern.
Sources and further reading
- Ginkgo — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Musculoskeletal / pain · Cardiovascular
Goldenrod
Solidago virgaurea
Traditional use — evidence not establishedA bright-flowered European and North American plant used traditionally as a mild diuretic tea for urinary tract discomfort, despite a common misconception that it primarily causes hay fever.
Herbs & BotanicalsTraditional European / AmericanUrinaryRead full entryClose entry
Goldenrod
Solidago virgaurea
Part used or form
Dried aerial parts (leaf and flower)
How it is used
By mouth
Also called
Solidago
Traditional / historical use
- Mild urinary tract discomfort
- Traditional 'flushing' support for the urinary tract
- Traditional wound care (historical, topical)
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Goldenrod has a long European herbal tradition for urinary complaints, but there is little modern clinical trial evidence in humans confirming a benefit.
Safety
Goldenrod tea is generally considered low risk for short-term use in adults without kidney disease, though allergic reactions can occur in people sensitive to ragweed-family plants.
Avoid or use caution
- Known allergy to ragweed or related daisy-family plants
- Kidney disease
- Congestive heart failure or conditions requiring fluid restriction
Medicine interactions
- May add to the effect of diuretic medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried leaf and flower were traditionally steeped as a tea.
Sources and further reading
- Urinary tract infections — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Goldenseal
Hydrastis canadensis
Traditional use — evidence not establishedA yellow-rooted woodland plant used by Native American nations and heavily harvested since; often combined with echinacea in cold products.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningCough/ColdSore ThroatSkinRead full entryClose entry
Goldenseal
Hydrastis canadensis
Part used or form
Root and rhizome
Also called
Yellow root · Orange root · Berberine source
Traditional / historical use
- Skin and eye washes
- Sore throat
- Digestive complaints
- Wounds
Historical use is not evidence that it works.
What has been studied
- Colds and upper respiratory infections
- Digestive infections
Current evidence label
Traditional use — evidence not established
There is very little human research on goldenseal, so its effects are unproven. It also does not mask drug tests, despite a persistent myth.
Safety
Short-term use appears tolerable for adults, but goldenseal contains berberine, which can be harmful to newborns and may cause jaundice. It is also a plant of conservation concern in the wild.
Avoid or use caution
- Newborns and infants — risk of jaundice and kernicterus
- Liver disease
- Multiple prescription medicines
Medicine interactions
- Berberine can affect many medicines processed by the liver
- May interact with cyclosporine and other narrow-margin medicines
Children
Do not give goldenseal or berberine products to babies or young children — they have caused serious harm in newborns.
Pregnancy and breastfeeding
Not recommended in pregnancy or breastfeeding.
How it was traditionally prepared
The root was powdered for washes and poultices, or tinctured.
Sources and further reading
- Goldenseal — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory · Skin
Gotu Kola
Centella asiatica
Limited / mixed evidenceA creeping leafy plant used across South and Southeast Asian and African traditional medicine, taken by mouth or applied to skin for wound healing and circulation.
Herbs & BotanicalsTraditional AsianOther Traditional SystemsSkinHeart/CirculationRead full entryClose entry
Gotu Kola
Centella asiatica
Part used or form
Leaf
How it is used
By mouth
Also called
Centella asiatica · Indian pennywort
Traditional / historical use
- Wound healing
- Skin conditions
- Traditionally used for memory and vitality
Historical use is not evidence that it works.
What has been studied
- Wound healing
- Venous circulation problems
- Mild cognitive symptoms
Current evidence label
Limited / mixed evidence
Some small trials suggest gotu kola extracts may help with minor venous circulation problems and wound healing, but the overall body of research is small, and cognitive-benefit claims are not well supported.
Safety
Short-term oral use appears generally well tolerated in available studies. Long-term safety data are limited, and it has been linked to liver concerns in rare reports.
Avoid or use caution
- Liver disease
- Before surgery, due to possible sedative effect
- Prolonged high-dose use
Medicine interactions
- May add to the effect of sedative medicines
- May affect blood sugar or cholesterol medicines, per some sources
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditionally avoided in pregnancy. Ask a doctor or midwife before any use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh or dried leaves eaten in salads, brewed as tea, or made into topical pastes and ointments for skin.
Sources and further reading
- Gotu Kola — MSK About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Grains of Paradise
Aframomum melegueta
Traditional use — evidence not establishedA peppery-tasting West African seed, related to ginger and cardamom, historically an important West African trade spice and traditional digestive remedy.
Herbs & BotanicalsTraditional African / African DiasporaDigestionRead full entryClose entry
Grains of Paradise
Aframomum melegueta
Part used or form
Dried seed
How it is used
By mouth
Also called
Guinea pepper · Melegueta pepper
Traditional / historical use
- Digestive discomfort
- Traditional West African remedy for general malaise
- Peppery seasoning for stews and meats
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Grains of paradise has a documented history as a major West African spice and folk remedy, but there is no substantial modern clinical research on it in humans.
Safety
Ordinary amounts used to season food are considered safe for most people. Concentrated extracts have not been well studied for safety.
Avoid or use caution
- Concentrated extract or supplement forms, which are not well studied
Children
Fine as an ordinary food seasoning in typical culinary amounts.
Pregnancy and breastfeeding
Traditional West African practice includes cautious use of many spices in pregnancy; Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract.
How it was traditionally prepared
Whole seeds crushed or ground and added to stews, marinades and spice blends.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Traditional medicine — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Grape Seed Extract
Vitis vinifera
Limited / mixed evidenceA concentrated extract of grape seeds, made from a by-product of winemaking and sold as an antioxidant supplement.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningInflammationSkinHeart/CirculationGeneral NutritionRead full entryClose entry
Grape Seed Extract
Vitis vinifera
Part used or form
Extract of the seeds
Also called
GSE · Proanthocyanidin extract
Traditional / historical use
- Wound care and skin
- Eye strain
- Circulation
Historical use is not evidence that it works.
What has been studied
- Blood pressure
- Leg swelling and vein problems
- Cholesterol
- Wound healing
Current evidence label
Limited / mixed evidence
Some small studies suggest modest effects on blood pressure or leg swelling, but the research is limited and inconsistent.
Safety
Generally well tolerated; headache, dizziness and nausea are reported.
Avoid or use caution
- Blood-thinner use
- Before surgery
Medicine interactions
- May increase bleeding risk with blood thinners
- May affect blood pressure medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Grapes, leaves and sap were used in European folk medicine; concentrated seed extracts are a modern product.
Sources and further reading
- Grape seed extract — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Skin · Musculoskeletal / pain · Cardiovascular · Immune / general wellness
Grapefruit
Citrus × paradisi
Some evidenceA citrus fruit that is nutritious like other citrus but is unusual among foods for its well-documented ability to interfere with how the body processes a long list of common prescription medicines.
Foods & Kitchen RemediesTraditional European / AmericanHigh caution — do not self-treatGeneral NutritionOtherRead full entryClose entry
Grapefruit
Citrus × paradisi
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Can raise blood levels of some prescription medicines to unsafe levels
Part used or form
Whole fruit or juice
How it is used
By mouth
Also called
Grapefruit juice
Traditional / historical use
- Everyday eating, especially at breakfast
- A traditional grapefruit-based reducing diet, not supported as effective
Historical use is not evidence that it works.
What has been studied
- Vitamin C and antioxidant intake
- Drug interactions caused by compounds in grapefruit
Current evidence label
Some evidence
As food, grapefruit provides vitamin C, potassium and antioxidants similar to other citrus fruit. Separately from nutrition, compounds in grapefruit are well documented to block an enzyme in the gut wall that normally breaks down certain medicines, which can raise blood levels of those drugs to unsafe levels or, less often, lower the effect of others. This is one of the best-established food–drug interactions in medicine and applies even to modest amounts of the whole fruit or its juice, not just large quantities.
Safety
Safe as food for people not taking an affected medicine. Anyone taking a prescription medicine should check whether grapefruit is listed as an interaction on the medicine's label or ask a pharmacist, because the interaction list includes some statins, some blood pressure and heart-rhythm medicines, some immune-suppressing drugs, and others.
Avoid or use caution
- Anyone starting or taking a medicine with a known grapefruit interaction should ask a pharmacist or prescriber before eating grapefruit or drinking its juice
Medicine interactions
- Documented interactions with numerous prescription medicines, including some statins, calcium channel blockers, immunosuppressants, and other drugs metabolized by the same gut enzyme — check any new prescription label or ask a pharmacist before adding grapefruit to the diet
Children
Ordinary grapefruit as food is fine for children not on an affected medicine; the same interaction caution applies to children taking prescription medicines as it does to adults.
Pregnancy and breastfeeding
Ordinary food during pregnancy for most people; anyone taking a prescription medicine during pregnancy should still check for a grapefruit interaction, since pregnancy does not remove the risk.
How it was traditionally prepared
Eaten fresh in halves, segmented, or juiced.
Sources and further reading
- Drug reactions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Blood pressure medicines — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Vitamin C — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Using dietary supplements wisely — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Immune / general wellness
Related remedies
Grapes
Vitis vinifera
Limited / mixed evidenceA widely eaten fruit valued for antioxidant plant compounds, including resveratrol, though whole-fruit amounts are far below the doses tested in supplement research.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsHeart/CirculationGeneral NutritionRead full entryClose entry
Grapes
Vitis vinifera
Part used or form
Whole fresh fruit
How it is used
By mouth
Also called
Grape · Table grapes
Traditional / historical use
- Everyday eating
- Traditional winemaking and drying into raisins
Historical use is not evidence that it works.
What has been studied
- Antioxidant intake as part of overall diet
- Resveratrol and cardiovascular research, mainly using concentrated extracts rather than whole fruit
Current evidence label
Limited / mixed evidence
Grapes contain antioxidant compounds, including resveratrol, that have drawn research interest for heart health, but most of that research uses concentrated extracts or supplements at levels well beyond what eating whole grapes provides. As a whole food, grapes fit a healthy diet pattern; specific heart-protective claims for eating grapes themselves are not well established.
Safety
Safe as food for most people. Whole grapes are one of the most common choking hazards in young children because of their round, smooth shape and size.
Avoid or use caution
- Whole grapes are a serious and well-documented choking hazard for infants and young children
Children
Whole grapes, cherries, and firm chunks of hard fruit are a well-known choking hazard for infants and young children. Cut round or firm fruit into small pieces, and remove pits and seeds before serving to a young child.
Pregnancy and breastfeeding
Ordinary food during pregnancy with no established restriction; wash well before eating.
How it was traditionally prepared
Eaten fresh, dried into raisins, or pressed into juice or wine.
Sources and further reading
- Antioxidants — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Choking — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Metabolic
Related remedies
Green Tea
Camellia sinensis
Limited / mixed evidenceUnfermented tea leaf, central to Chinese and Japanese daily life for centuries and one of the most studied beverages in the world.
Teas & InfusionsTraditional AsianSerious safety warningDigestionHeart/CirculationMetabolic/Blood SugarRead full entryClose entry
Green Tea
Camellia sinensis
Part used or form
Dried unfermented leaves; also concentrated extracts
Also called
Camellia sinensis · Matcha · Sencha · EGCG
Traditional / historical use
- Alertness
- Digestion
- Daily social and ceremonial drink
Historical use is not evidence that it works.
What has been studied
- Weight loss
- Heart health and cholesterol
- Cancer prevention
- Alertness
Current evidence label
Limited / mixed evidence
Drinking green tea is associated with some health measures in population studies, but trials have not shown that green tea or its extracts treat or prevent specific diseases; weight-loss effects are small at best.
Safety
Tea as a drink is generally safe for adults, though caffeine can disturb sleep. Concentrated green tea extracts have been linked to liver injury in some people.
Avoid or use caution
- Liver disease — be cautious with concentrated extracts
- Caffeine sensitivity, heart rhythm problems
- Iron-deficiency anaemia — tea with meals reduces iron absorption
Medicine interactions
- Caffeine adds to stimulant effects
- May reduce the effect of some medicines including nadolol and possibly bortezomib
- May interact with blood thinners
Children
Caffeinated drinks are generally not recommended for young children, and green tea extract supplements are not a children's remedy.
Pregnancy and breastfeeding
Watch total caffeine; avoid concentrated extracts. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Leaves are steamed or pan-fired then steeped in hot water; matcha is stone-ground whole leaf whisked into water.
Sources and further reading
- Green tea — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Cardiovascular · Metabolic
Green Tea (as a Drink)
Camellia sinensis
Limited / mixed evidenceLightly processed Camellia sinensis leaves steeped into a mild, grassy everyday drink — the beverage form of green tea, distinct from concentrated green tea extract supplements covered in the main green tea entry.
Teas & InfusionsTraditional AsianSerious safety warningHeart/CirculationMetabolic/Blood SugarRead full entryClose entry
Green Tea (as a Drink)
Camellia sinensis
Part used or form
Unoxidized or lightly processed tea leaves steeped in hot water, or whisked as matcha
How it is used
By mouth
Also called
Brewed green tea · Sencha · Matcha drink
Traditional / historical use
- Everyday beverage
- Tea ceremony traditions
- After-meal drink
Historical use is not evidence that it works.
What has been studied
- Heart and metabolic health associations (population studies)
- Alertness from caffeine and L-theanine
Current evidence label
Limited / mixed evidence
Drinking green tea is linked in population studies with some favorable heart and metabolic associations, but these studies cannot prove the tea itself causes the benefit, and concentrated green tea extract supplements are a different, more concentrated product with their own separate liver-safety concerns.
Safety
Generally safe as an ordinary beverage in typical amounts. Green tea contains caffeine, and very large amounts of brewed tea (well beyond ordinary drinking) have rarely been associated with liver effects, though this is much more clearly documented for concentrated extract supplements.
Avoid or use caution
- Caffeine sensitivity or anxiety
- Iron-deficiency anemia — avoid drinking with iron-rich meals
- Liver conditions — ordinary tea drinking is different from concentrated extract capsules, but ask a doctor if concerned
Medicine interactions
- Caffeine can interact with stimulant medicines
- May reduce absorption of some medicines and non-heme iron when taken together
Children
Green tea contains caffeine; it is not recommended as a regular drink for young children.
Pregnancy and breastfeeding
Caffeine is generally advised to be limited in pregnancy; green tea's caffeine content counts toward that daily total.
How it was traditionally prepared
Leaves steamed or pan-fired to stop oxidation, dried, then steeped in hot water or ground into matcha and whisked.
Sources and further reading
- Green tea — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Caffeine — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Guarana
Paullinia cupana
Limited / mixed evidenceA seed from an Amazonian climbing plant with one of the highest natural caffeine contents of any plant, traditionally used by Indigenous Amazonian peoples for energy and now widely sold in energy drinks and supplements.
Herbs & BotanicalsOther Traditional SystemsHigh caution — do not self-treatHeart/CirculationOtherRead full entryClose entry
Guarana
Paullinia cupana
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- High caffeine content; excess intake can raise heart rate and blood pressure
Part used or form
Seed
How it is used
By mouth
Also called
Paullinia cupana · Brazilian cocoa
Traditional / historical use
- Energy and stamina
- Traditionally used to reduce fatigue
Historical use is not evidence that it works.
What has been studied
- Mental alertness and fatigue
- Weight management (in combination products)
- Athletic performance
Current evidence label
Limited / mixed evidence
Guarana's effects on alertness and fatigue are largely explained by its high caffeine content; research specific to guarana beyond a caffeine effect is limited. Weight-loss claims in combination supplements are not well supported.
Safety
Guarana is a concentrated caffeine source. Its stimulant effects and risks mirror those of caffeine, and total caffeine intake from all sources (coffee, tea, energy drinks, supplements) should be considered together.
Avoid or use caution
- Heart rhythm problems or high blood pressure
- Anxiety disorders
- Combining with other stimulants or energy drinks
- Caffeine sensitivity
Medicine interactions
- Combining with other caffeine sources or stimulant medicines can add up to unsafe caffeine intake
- May increase heart rate or blood pressure alongside stimulant drugs, including some ADHD and decongestant medicines
- May affect blood-thinning medicines
Children
Guarana is a concentrated caffeine source and is not appropriate for children; energy drinks and supplements containing it should not be given to children or teens.
Pregnancy and breastfeeding
Guarana adds to total caffeine intake, which is advised to be limited in pregnancy and breastfeeding. Ask a doctor or midwife before use.
How it was traditionally prepared
Seeds traditionally roasted, ground and formed into hardened sticks grated into water; now sold as powder, capsules and a common energy-drink ingredient.
Sources and further reading
- Guarana — MSK About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Caffeine — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- High blood pressure — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Cardiovascular
Related remedies
Guava Leaf
Psidium guajava
Limited / mixed evidenceThe leaf of the guava tree, brewed as a tea across Latin America, the Caribbean, Africa and Asia as a traditional remedy for diarrhea and stomach upset.
Teas & InfusionsTraditional African / African DiasporaOther Traditional SystemsDigestionRead full entryClose entry
Guava Leaf
Psidium guajava
Part used or form
Dried leaf, brewed as a tea
How it is used
By mouth
Also called
Guava leaf tea
Traditional / historical use
- Diarrhea
- Stomach upset
- Traditional wound rinses (topical, historical)
Historical use is not evidence that it works.
What has been studied
- Diarrhea
Current evidence label
Limited / mixed evidence
Some smaller studies, mostly outside the United States, have looked at guava leaf preparations for diarrhea with mixed and inconsistent results; the evidence is not strong enough to call it a proven treatment.
Safety
Guava leaf tea is widely consumed as a traditional beverage and is generally considered low risk for occasional use in adults, though it has not been rigorously tested for long-term safety.
Avoid or use caution
- Diabetes medicines
- Severe or bloody diarrhea (needs medical evaluation, not a home remedy)
Medicine interactions
- May affect blood sugar control
Children
Diarrhea in infants and young children can become dangerous quickly from dehydration; guava leaf tea should not delay medical care or oral rehydration for a child with diarrhea.
Pregnancy and breastfeeding
Traditional beverage-strength tea is widely used, but it has not been rigorously studied in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried or fresh leaves were traditionally boiled and the strained liquid taken as a tea.
Sources and further reading
- Diarrhea — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Traditional medicine — fact sheet — World Health OrganizationInternational government / WHO / EMA
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Guided Imagery
Some evidenceA relaxation technique in which a person, often following a recorded voice, pictures a calm or pleasant scene in detail to ease tension.
Mind-Body / Non-Drug PracticesTraditional European / AmericanStress/AnxietySleepPainRead full entryClose entry
Guided Imagery
Part used or form
Guided visualization practice
How it is used
Whole-body practice — listening while seated or lying down
Also called
Visualization · Mental imagery relaxation
Traditional / historical use
- Relaxation
- Calming nerves before a stressful event
Historical use is not evidence that it works.
What has been studied
- Anxiety
- Pain and procedure distress
- Sleep
Current evidence label
Some evidence
Guided imagery is one of the relaxation techniques with reasonable evidence for easing anxiety and procedure-related distress, though effects are usually modest and studies vary in quality.
Safety
Very low risk for most people. Occasionally intrusive or upsetting images can surface, especially for people with trauma histories.
Avoid or use caution
- History of trauma or flashbacks — a mental-health professional can help choose safe imagery
- Stop and check in with a clinician if the practice increases distress
Children
Simple, gentle imagery scripts are commonly used with children and are generally low risk.
Pregnancy and breastfeeding
Generally considered safe as a relaxation aid.
Historical and cultural background
Related to older traditions of visualization used in prayer and meditation practices worldwide.
How it was traditionally prepared
Modern guided-imagery scripts grew out of relaxation and hypnosis research in the 20th century.
Sources and further reading
- Relaxation techniques — what you need to know — NIH NCCIHU.S. federal health source
- Anxiety and complementary health approaches — NIH NCCIHU.S. federal health source
- Anxiety — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep
Related remedies
Gymnema Sylvestre
Gymnema sylvestre
Limited / mixed evidenceA climbing plant from Indian traditional (Ayurvedic) medicine whose Hindi name, gurmar, means 'sugar destroyer' — traditionally chewed to blunt the taste of sweetness and used as a blood-sugar remedy.
Herbs & BotanicalsTraditional AsianMetabolic/Blood SugarRead full entryClose entry
Gymnema Sylvestre
Gymnema sylvestre
Part used or form
Dried leaf
How it is used
By mouth
Also called
Gurmar · Sugar destroyer
Traditional / historical use
- Traditional support for healthy blood sugar
- Reducing perceived sweetness of food
Historical use is not evidence that it works.
What has been studied
- Blood glucose in diabetes
Current evidence label
Limited / mixed evidence
Small clinical studies suggest gymnema may modestly lower blood glucose in some people with diabetes, but trials are limited in number and size, and it is not a substitute for prescribed diabetes treatment.
Safety
Because gymnema can lower blood sugar, it needs careful attention alongside diabetes medicines to avoid blood sugar dropping too low.
Avoid or use caution
- Diabetes treated with insulin or other glucose-lowering medicines
- Planned surgery (blood sugar control)
Medicine interactions
- May add to the effect of insulin or oral diabetes medicines, raising the risk of low blood sugar
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried leaves were traditionally chewed directly or steeped into a bitter tea.
Sources and further reading
- Diabetes — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Blood glucose — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Ayurvedic medicine — in depth — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Metabolic
Related remedies
Hawthorn
Crataegus species
Limited / mixed evidenceA thorny hedgerow tree whose berries and leaves have a long European reputation as a heart tonic.
Herbs & BotanicalsTraditional European / AmericanTraditional AsianSerious safety warningSleepStress/AnxietyDigestionCough/ColdPainHeart/CirculationRead full entryClose entry
Hawthorn
Crataegus species
Part used or form
Berries, leaves and flowers
Also called
May tree · Whitethorn · Crataegus
Traditional / historical use
- Heart complaints
- Digestion
- Anxiety and sleep
Historical use is not evidence that it works.
What has been studied
- Heart failure symptoms
- Blood pressure
- Chest pain
Current evidence label
Limited / mixed evidence
Hawthorn has been studied as an add-on in heart failure with mixed results. It is not a replacement for prescribed heart treatment.
Safety
Usually mild side effects such as dizziness, nausea and headache, but heart conditions need medical management.
Avoid or use caution
- Any heart condition — talk to a cardiologist first
- Never stop prescribed heart medicine to try an herb
Medicine interactions
- May interact with digoxin and other heart medicines
- May add to the effect of blood-pressure medicines and nitrates
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Berries were made into jelly, syrup and tea; flowering tops steeped as an infusion.
Sources and further reading
- Hawthorn — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Respiratory · Nervous system / sleep · Musculoskeletal / pain · Cardiovascular
Hazelnuts
Corylus avellana
Some evidenceA tree nut common in European cooking and confectionery, discussed in nutrition guidance as a source of unsaturated fat and vitamin E.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsHeart/CirculationGeneral NutritionRead full entryClose entry
Hazelnuts
Corylus avellana
Part used or form
Tree nut seed, whole, roasted or ground
How it is used
By mouth
Also called
Filberts
Traditional / historical use
- An everyday snack and baking ingredient across Europe and the Caucasus
Historical use is not evidence that it works.
What has been studied
- Blood cholesterol and heart health as part of an overall diet pattern that includes nuts
Current evidence label
Some evidence
As with other tree nuts, general nutrition guidance associates regular hazelnut intake with more favorable cholesterol markers when it replaces less healthy fats, as part of an overall diet.
Safety
Tree nuts, including hazelnuts, are a major food allergen and reactions can be serious; hazelnut allergy is also linked to cross-reactivity with birch pollen in some people. Whole nuts are a choking hazard for young children.
Avoid or use caution
- Known tree nut allergy, including birch-pollen-associated hazelnut allergy — avoid
- Whole nuts — choking hazard for infants and young children
Children
Whole hazelnuts should not be given to infants and young children because of choking risk; finely ground forms can be considered from an appropriate age if there is no nut allergy.
Pregnancy and breastfeeding
An ordinary food during pregnancy for people without a nut allergy; no special restriction described in general nutrition guidance.
How it was traditionally prepared
Eaten roasted and whole, ground into pastes and spreads, or used in baking and confectionery.
Sources and further reading
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Food allergy — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Choking — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Metabolic
Related remedies
Heat Therapy
Some evidenceApplying warmth to the body — a heating pad, warm compress or warm bath — to ease muscle tension and stiffness, used across essentially every traditional culture.
Mind-Body / Non-Drug PracticesTraditional European / AmericanTraditional AsianTraditional African / African DiasporaHigh caution — do not self-treatPainMenstrual/MenopauseRead full entryClose entry
Heat Therapy
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Burns reported with prolonged or high-heat use
Part used or form
Warm compress, heating pad or warm soak applied to the skin
How it is used
On the skin
Also called
Warm compress · Heating pad therapy · Thermotherapy
Traditional / historical use
- Muscle aches and stiffness
- Menstrual cramps
- Joint stiffness
Historical use is not evidence that it works.
What has been studied
- Low back pain
- Menstrual cramps
- Muscle soreness
Current evidence label
Some evidence
Heat application has reasonable evidence for short-term relief of low back pain and menstrual cramps, working by relaxing muscles and increasing local blood flow.
Safety
Generally safe for short periods at a comfortable temperature. Burns can occur with high heat, prolonged contact, or use on numb or fragile skin.
Avoid or use caution
- Reduced skin sensation (e.g., from diabetes or nerve damage) — check temperature carefully or avoid
- Open wounds, active inflammation right after an acute injury, or skin infections
- Never fall asleep on a heating pad
Children
Use lower temperatures, shorter times, and supervise closely to avoid burns.
Pregnancy and breastfeeding
A warm (not hot) compress on the back is generally fine; avoid very hot baths and prolonged whole-body heat exposure.
How it was traditionally prepared
Warm stones, heated cloths, warm baths and later electric heating pads have been used across cultures for centuries.
Sources and further reading
- Back pain — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Sprains and strains — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Burns — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Musculoskeletal / pain
Related remedies
Hemp Seeds
Cannabis sativa
Limited / mixed evidenceThe shelled seed of the hemp plant, a non-intoxicating food product distinct from cannabis used for its psychoactive effects, discussed in nutrition guidance as a source of plant protein and unsaturated fat, including omega-3 fat.
Foods & Kitchen RemediesTraditional AsianTraditional European / AmericanSerious safety warningGeneral NutritionHeart/CirculationRead full entryClose entry
Hemp Seeds
Cannabis sativa
Part used or form
Shelled seed, eaten whole, ground, or pressed into oil
How it is used
By mouth
Also called
Hemp hearts · Shelled hemp seed
Traditional / historical use
- A traditional food and oil-seed crop in parts of Asia and Europe
Historical use is not evidence that it works.
What has been studied
- Plant protein and essential fatty acid intake as part of an overall diet
Current evidence label
Limited / mixed evidence
Hulled hemp seed is a nutrient-dense source of complete plant protein and unsaturated fats, including some omega-3 fat, but dedicated clinical research on hemp seed itself, as distinct from its individual nutrients, is limited.
Safety
Food-grade hulled hemp seed and hemp seed oil contain only trace, non-intoxicating amounts of THC and are not a source of cannabis's psychoactive effects; they are generally recognized as safe foods in the U.S. Hemp seed products should not be confused with cannabis or CBD products, which are regulated differently.
Avoid or use caution
- Do not confuse hulled food-grade hemp seed with cannabis or CBD products, which have different effects and regulation
Children
An ordinary food ingredient for children as part of a balanced diet; whole seeds are small and generally not a choking risk, but any new food should be introduced in age-appropriate amounts.
Pregnancy and breastfeeding
Food-grade hulled hemp seed is an ordinary dietary source of protein and fat; this is separate from cannabis use, which is advised against in pregnancy — anyone with questions about hemp products during pregnancy should check with a clinician.
How it was traditionally prepared
Eaten raw as hulled 'hemp hearts' sprinkled on food, blended into smoothies, or pressed into hemp seed oil.
Sources and further reading
- Dietary proteins — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Metabolic
Related remedies
Hibiscus / Roselle
Hibiscus sabdariffa
Limited / mixed evidenceA tart, ruby-red flower calyx grown across West Africa, the Caribbean, Latin America and the Middle East, eaten and brewed under names like bissap, zobo, sorrel and karkade long before it became a mainstream tea ingredient.
Herbs & BotanicalsTraditional African / African DiasporaOther Traditional SystemsHeart/CirculationRead full entryClose entry
Hibiscus / Roselle
Hibiscus sabdariffa
Part used or form
Dried calyces (the fleshy petal-like part around the seed pod)
How it is used
By mouth
Also called
Hibiscus sabdariffa · Roselle · Sorrel (Caribbean) · Zobo · Bissap · Karkade
Traditional / historical use
- Refreshing everyday drink and festive beverage
- Traditionally used for mild fluid retention
- Traditional use for blood pressure and digestion in several cultures
Historical use is not evidence that it works.
What has been studied
- Blood pressure
- Cholesterol
- Metabolic health
Current evidence label
Limited / mixed evidence
Several small clinical trials suggest hibiscus tea may modestly lower blood pressure in some people, but studies differ in quality, preparation and length, so it is not considered a substitute for prescribed blood pressure treatment.
Safety
Drinking hibiscus as a beverage is widely consumed as food and generally considered low risk. It can lower blood pressure, which matters for people already on blood pressure medicine.
Avoid or use caution
- Low blood pressure
- People on blood pressure medicines, who should monitor for extra lowering
Medicine interactions
- May add to the effect of blood pressure medicines
- May affect how the body processes certain medicines, including some pain relievers, per limited data
Children
Hibiscus drinks are consumed as food across many cultures in modest amounts; concentrated supplements are not a children's remedy.
Pregnancy and breastfeeding
Some traditional sources caution against concentrated hibiscus use in pregnancy. Ask a doctor or midwife before using hibiscus supplements or large amounts of tea while pregnant or breastfeeding.
Historical and cultural background
Hibiscus sabdariffa (roselle) has long been part of everyday and ceremonial life across West Africa and the African diaspora — as bissap in Senegal, zobo in Nigeria, sorrel in the Caribbean at Christmas, and karkade in Sudan and Egypt. This long, wide use reflects deep cultural importance; it does not by itself establish that the drink treats any medical condition.
How it was traditionally prepared
Dried calyces steeped in hot or cold water, often with ginger, spices or sugar, into a tart red beverage.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- High blood pressure — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular
Related remedies
Hibiscus Tea
Hibiscus sabdariffa
Limited / mixed evidenceA tart, deep-red infusion made from dried hibiscus calyces — known as sorrel, bissap or karkade across Africa, the Caribbean and the Middle East, often served for celebrations.
Teas & InfusionsTraditional African / African DiasporaOther Traditional SystemsHeart/CirculationRead full entryClose entry
Hibiscus Tea
Hibiscus sabdariffa
Part used or form
Dried calyces (flower parts) steeped in hot or cold water
How it is used
By mouth
Also called
Sorrel drink · Bissap · Karkade · Roselle tea
Traditional / historical use
- Refreshing drink
- Festive and holiday drink
- Traditional support for digestion
Historical use is not evidence that it works.
What has been studied
- Mildly elevated blood pressure
Current evidence label
Limited / mixed evidence
Some clinical studies suggest hibiscus tea may modestly lower blood pressure in people with mild hypertension, but studies are small, and a cup of tea is not a substitute for prescribed blood pressure treatment.
Safety
Generally safe as a beverage; can interact with blood pressure medicine and may affect blood sugar readings.
Avoid or use caution
- Low blood pressure
- Taking blood pressure or diabetes medicine — monitor with a doctor
Medicine interactions
- May add to the effect of blood pressure medicines
- May affect diabetes medicines
Children
An occasional cup is a common family drink in many cultures; this is a comfort drink, not a treatment, for a child with high blood pressure.
Pregnancy and breastfeeding
Some traditional guidance advises caution or avoidance of concentrated hibiscus tea in pregnancy; ask a midwife or doctor.
How it was traditionally prepared
Dried calyces boiled or steeped, often sweetened and sometimes combined with ginger or spices, served hot or chilled.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular
Holy Basil (Tulsi)
Ocimum tenuiflorum
Limited / mixed evidenceA sacred plant in Ayurvedic and Hindu tradition, brewed as tulsi tea and used as a general wellness and stress-easing herb across South Asia.
Teas & InfusionsTraditional AsianSerious safety warningStress/AnxietyCough/ColdRead full entryClose entry
Holy Basil (Tulsi)
Ocimum tenuiflorum
Part used or form
Fresh or dried leaf, brewed as a tea
How it is used
By mouth
Also called
Tulsi · Sacred basil
Traditional / historical use
- General stress and 'adaptogen' tonic use
- Colds and coughs
- Digestive comfort
Historical use is not evidence that it works.
What has been studied
- Stress and mood
- Blood sugar (preliminary)
Current evidence label
Limited / mixed evidence
Preliminary human studies suggest tulsi may modestly ease stress and support healthy blood sugar, but the research base is still small and needs larger, better-controlled trials.
Safety
Tulsi tea is widely consumed and generally well tolerated by most adults in customary tea amounts. Concentrated extracts have less safety data.
Avoid or use caution
- Bleeding disorders
- Diabetes medicines
- Thyroid conditions
- Trying to conceive (traditional caution)
Medicine interactions
- May add to the effect of blood-thinning medicines
- May affect blood sugar control
- May affect thyroid function in some reports
Children
Occasional weak tea is common in households where tulsi is grown, but concentrated supplements are not advised for children without a pediatrician's guidance.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Traditional caution against concentrated tulsi in pregnancy exists because of possible effects on the uterus.
How it was traditionally prepared
Fresh or dried leaves were traditionally steeped as a household tea, often alongside other spices.
Sources and further reading
- Stress — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Ayurvedic medicine — in depth — NIH NCCIHU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Metabolic · Immune / general wellness
Related remedies
Holy Basil Tea
Ocimum tenuiflorum
Limited / mixed evidenceAn infusion made from tulsi (holy basil) leaf, a plant central to Ayurvedic tradition and distinct from the culinary sweet basil used in cooking.
Teas & InfusionsTraditional AsianOther Traditional SystemsStress/AnxietyMetabolic/Blood SugarRead full entryClose entry
Holy Basil Tea
Ocimum tenuiflorum
Part used or form
Dried leaf steeped as a hot-water infusion
How it is used
By mouth
Also called
Tulsi tea
Traditional / historical use
- Considered a sacred and 'adaptogenic' plant in Ayurveda
- Colds and coughs
- Everyday stress relief
Historical use is not evidence that it works.
What has been studied
- Stress and mood (small studies)
- Blood sugar (preliminary)
Current evidence label
Limited / mixed evidence
Small human trials suggest holy basil extract may modestly ease stress and affect blood sugar, but most studies used concentrated extracts rather than brewed tea, are small, and need confirmation.
Safety
Brewed tulsi tea is widely used as an everyday beverage and generally considered low risk for most adults.
Avoid or use caution
- Diabetes medicines
- Blood-thinning medicines
- Planned surgery
- Fertility concerns (traditional caution)
Medicine interactions
- May add to the effect of blood sugar or blood-thinning medicines
Children
Herbal and specialty teas are not advised as a home remedy for infants and young children. Ask the child's doctor first, and keep any caffeine-containing tea away from young children.
Pregnancy and breastfeeding
Some traditional systems advise against holy basil in pregnancy. Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh or dried tulsi leaves have traditionally been steeped in hot water, often with other spices, as an everyday household drink.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Traditional medicine — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Metabolic · Immune / general wellness
Honey
Some evidenceOne of the oldest household remedies on earth, used for coughs and sore throats in nearly every food culture.
Foods & Kitchen RemediesTraditional African / African DiasporaTraditional AsianTraditional European / AmericanCough/ColdSore ThroatSkinRead full entryClose entry
Honey
Part used or form
Food — eaten plain, stirred into warm drinks
Also called
Raw honey · Wildflower honey · Buckwheat honey
Traditional / historical use
- Cough
- Sore throat
- Wound dressings historically
- Sweetener
Historical use is not evidence that it works.
What has been studied
- Night-time cough
- Sore throat comfort
Current evidence label
Some evidence
Health agencies list honey among the reasonable home comfort measures for cough and sore throat in adults and older children. It soothes symptoms; it does not treat the infection causing them.
Safety
Safe for most people over 1 year old. It is a sugar, so it counts toward daily sugar and matters for diabetes and tooth care.
Avoid or use caution
- Babies under 1 year — risk of infant botulism
- Diabetes
- A cough with fever, breathing trouble or lasting more than a couple of weeks needs a doctor
Medicine interactions
- Counts as sugar with diabetes medicines and blood-sugar monitoring
Children
Never give honey, or anything containing honey, to a baby under 1 year old — it can cause infant botulism. For older children, ask the child's doctor before treating a cough at home.
Pregnancy and breastfeeding
Ordinary food in normal amounts.
How it was traditionally prepared
Taken by the spoon, stirred into warm water with lemon, mixed into herbal teas, or spread on bread.
Sources and further reading
- How to treat the common cold at home — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Cough — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Sore throat — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Related concerns
Body systems: Respiratory · Skin
Honey and Lemon in Warm Water
Citrus limon (lemon)
Limited / mixed evidenceThe classic sick-day drink: warm liquid to soothe the throat, honey to coat it, lemon for taste and vitamin C.
Teas & InfusionsTraditional European / AmericanTraditional African / African DiasporaCough/ColdSore ThroatGeneral NutritionRead full entryClose entry
Honey and Lemon in Warm Water
Citrus limon (lemon)
Part used or form
Warm drink — lemon juice and honey in hot water
Also called
Hot lemon · Lemon and honey · Hot toddy (without alcohol)
Traditional / historical use
- Sore throat
- Cough
- Colds
- Comfort while feverish
Historical use is not evidence that it works.
What has been studied
- Cough and sore throat comfort
- Vitamin C and colds
Current evidence label
Limited / mixed evidence
Warm fluids and honey are recommended as comfort measures for cold symptoms. Vitamin C, including from lemons, has not been shown to prevent colds in most people.
Safety
Very low risk for adults and older children. Frequent acidic drinks can wear tooth enamel, and hot liquids can scald.
Avoid or use caution
- Babies under 1 year — no honey
- Serve warm, not scalding, especially around children
- Reflux may worsen with citrus
Medicine interactions
- Counts as sugar with diabetes medicines
Children
Never give honey, or anything containing honey, to a baby under 1 year old — it can cause infant botulism.
Pregnancy and breastfeeding
Ordinary food and drink.
How it was traditionally prepared
Squeezed lemon and honey stirred into hot (not boiling) water; sometimes with ginger or cinnamon.
Sources and further reading
- How to treat the common cold at home — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Common cold — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Sore throat — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Related concerns
Body systems: Respiratory · Immune / general wellness
Hoodia
Hoodia gordonii
Traditional use — evidence not establishedA succulent from the Kalahari, chewed by San peoples on long journeys and later marketed heavily as an appetite suppressant.
Herbs & BotanicalsTraditional African / African DiasporaSerious safety warningDigestionMetabolic/Blood SugarRead full entryClose entry
Hoodia
Hoodia gordonii
Part used or form
Stem of a southern African succulent
Also called
Hoodia gordonii · Bushman's hat · Xhoba
Traditional / historical use
- Suppressing hunger and thirst while travelling or hunting
- Indigestion
Historical use is not evidence that it works.
What has been studied
- Appetite suppression
- Weight loss
Current evidence label
Traditional use — evidence not established
There is almost no reliable human research on hoodia for weight loss, and many products sold as hoodia have been found to contain little or none of the plant.
Safety
Safety is not well studied. One study of a purified extract reported raised blood pressure and pulse and unpleasant side effects.
Avoid or use caution
- High blood pressure or heart conditions
- Diabetes
- Products claiming rapid weight loss
Medicine interactions
- May affect blood pressure and diabetes medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh stem was peeled and chewed during long hunts.
Sources and further reading
- Hoodia — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Dietary supplements — regulation and safety — U.S. Food and Drug AdministrationU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Metabolic
Hops
Humulus lupulus
Limited / mixed evidenceThe flower cone best known for flavoring beer, also used in traditional European herbal medicine as a calming, sleep-supporting herb, often alongside valerian.
Herbs & BotanicalsTraditional European / AmericanSleepStress/AnxietyRead full entryClose entry
Hops
Humulus lupulus
Part used or form
Dried flower cones (strobiles)
How it is used
By mouth
Also called
Humulus lupulus
Traditional / historical use
- Sleep support
- Mild nervous tension
- Digestive bitterness
Historical use is not evidence that it works.
What has been studied
- Sleep quality (usually in combination with valerian)
- Menopausal symptoms
Current evidence label
Limited / mixed evidence
Most clinical research combines hops with valerian, making it hard to know how much hops alone contributes. Results for sleep quality in these combination trials are modest and mixed.
Safety
Hops is widely consumed in beer and is generally considered safe as a supplement for short-term use. It can cause drowsiness.
Avoid or use caution
- Depression, per some traditional cautions
- Hormone-sensitive conditions, per some sources
- Driving or operating machinery after use, due to drowsiness
Medicine interactions
- May add to the effect of sedative medicines, alcohol, or other sleep aids
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditionally avoided in pregnancy. Ask a doctor or midwife before any use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried flower cones stuffed into sleep pillows, steeped as tea, or tinctured, often combined with valerian root.
Sources and further reading
- Hops — MSK About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Insomnia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep
Related remedies
Horehound
Marrubium vulgare
Traditional use — evidence not establishedA bitter, minty-smelling herb long used in European and American folk medicine as a cough remedy, historically the base flavor of horehound candy.
Herbs & BotanicalsTraditional European / AmericanCough/ColdSore ThroatRead full entryClose entry
Horehound
Marrubium vulgare
Part used or form
Dried leaf and flowering top
How it is used
By mouth
Also called
White horehound · Marrubium vulgare
Traditional / historical use
- Cough and sore throat
- Loosening chest congestion
- Digestive complaints
Historical use is not evidence that it works.
What has been studied
- Cough (limited human research)
Current evidence label
Traditional use — evidence not established
Horehound has a long folk history as a cough remedy, but there is very little modern clinical research confirming it eases cough or congestion in people.
Safety
Small amounts, such as in horehound candy or tea, are generally considered low risk. Large amounts may cause digestive upset or affect heart rhythm.
Avoid or use caution
- Heart rhythm conditions
- Diabetes medicines
- Large or concentrated amounts
Medicine interactions
- May affect blood sugar or heart rhythm medicines, per limited traditional and preclinical data
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditionally avoided in pregnancy. Ask a doctor or midwife before any use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried leaves steeped as tea, or boiled with sugar into traditional horehound candy and cough drops.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Cough — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Respiratory
Related remedies
Horse Chestnut
Aesculus hippocastanum
Limited / mixed evidenceThe conker tree of European parks; processed seed extract is used for leg vein problems.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningCough/ColdPainInflammationHeart/CirculationRead full entryClose entry
Horse Chestnut
Aesculus hippocastanum
Part used or form
Seed extract, bark, leaf and flower
Also called
Conker tree · Aesculus · HCSE
Traditional / historical use
- Leg swelling and varicose veins
- Haemorrhoids
- Joint pain
Historical use is not evidence that it works.
What has been studied
- Chronic venous insufficiency
- Leg swelling
- Haemorrhoids
Current evidence label
Limited / mixed evidence
Standardised horse chestnut seed extract has some evidence for reducing leg swelling and discomfort in vein problems, though studies are modest in size and quality.
Safety
Processed extract is usually tolerated with mild digestive upset or itching. Raw horse chestnut seed, bark, flower and leaf are poisonous if eaten.
Avoid or use caution
- Never eat raw conkers or homemade horse chestnut preparations
- Liver or kidney disease
- Blood-thinner use
Medicine interactions
- May increase bleeding risk with blood thinners
- May affect blood sugar
Children
Raw horse chestnut seeds are poisonous. Keep conkers out of small children's mouths.
Pregnancy and breastfeeding
Not recommended. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditional European use involved processed seed preparations and topical gels; the raw seed was never a food.
Sources and further reading
- Horse chestnut — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory · Musculoskeletal / pain · Cardiovascular
Horsetail
Equisetum arvense
Traditional use — evidence not establishedA primitive, silica-rich plant used in European folk medicine as a mild diuretic tea for water retention and urinary discomfort, and topically for wound care.
Herbs & BotanicalsTraditional European / AmericanUrinaryRead full entryClose entry
Horsetail
Equisetum arvense
Part used or form
Dried aerial stem
How it is used
By mouth
Also called
Shavegrass · Equisetum
Traditional / historical use
- Mild water retention
- Urinary tract discomfort
- Traditional support for hair, skin and nails (silica content)
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Horsetail has a long folk history as a mild diuretic, but rigorous modern clinical trials in humans are lacking, so its effectiveness for these traditional uses is not established.
Safety
Some horsetail species and older preparations have been associated with thiamine (vitamin B1) breakdown and, rarely, nicotine-like contamination from misidentified related plants, so commercially prepared, properly identified products matter.
Avoid or use caution
- Diuretic medicines
- Kidney disease
- Low potassium
- Long-term daily use
Medicine interactions
- May add to the effect of diuretic (water pill) medicines
- May lower potassium when combined with other diuretics
- May interfere with thiamine (vitamin B1) with prolonged use
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried stems were traditionally simmered into a decoction or tea, and fresh stems were used to scrub pots (hence 'shavegrass').
Sources and further reading
- Urinary incontinence — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Humidified Air and Steam
Limited / mixed evidenceAdding moisture to dry air can ease a scratchy throat, blocked nose and night-time cough.
Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianCough/ColdSore ThroatSkinRead full entryClose entry
Humidified Air and Steam
Part used or form
Moist air from a humidifier or a steamy bathroom
Also called
Humidifier · Vaporiser · Steamy bathroom · Steam inhalation
Traditional / historical use
- Congestion
- Cough
- Croupy breathing
- Dry winter air
Historical use is not evidence that it works.
What has been studied
- Cold and congestion symptoms
Current evidence label
Limited / mixed evidence
Humidified air is listed among home comfort measures for colds. It may ease symptoms; evidence that it shortens illness is weak.
Safety
The real risk is burns. Steam and boiling water cause serious scalds, especially to children, so leaning over a pot or using hot steam vaporisers near children is discouraged. Dirty humidifiers can also spread mould and bacteria.
Avoid or use caution
- Never let a child near boiling water, a steaming pot or a hot vaporiser
- Use cool-mist devices around children
- Clean and dry humidifiers regularly and use clean water
- Asthma can worsen with damp air
Children
Steam burns are a common childhood injury. Use cool-mist humidifiers, and never a bowl of boiling water.
Pregnancy and breastfeeding
Low risk; take the same burn precautions.
How it was traditionally prepared
Kettles were left steaming in sickrooms historically — a practice now discouraged because of burns.
Sources and further reading
- How to treat the common cold at home — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Burns — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Cough — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Related concerns
Body systems: Respiratory · Skin
Hydrotherapy
Limited / mixed evidenceUsing water — warm baths, contrast baths, or supervised pool exercise — for relaxation and to ease muscle and joint pain, with roots in European spa traditions and physical therapy.
Mind-Body / Non-Drug PracticesTraditional European / AmericanOther Traditional SystemsPainHeart/CirculationRead full entryClose entry
Hydrotherapy
Part used or form
Warm or contrast water immersion, baths, or supervised pool exercise
How it is used
Whole-body practice — water immersion or pool-based exercise
Also called
Water therapy · Warm-water immersion therapy · Balneotherapy
Traditional / historical use
- Muscle and joint pain relief
- Relaxation
- Spa and bathing traditions
Historical use is not evidence that it works.
What has been studied
- Arthritis pain
- Fibromyalgia symptoms
- Low back pain
- General relaxation
Current evidence label
Limited / mixed evidence
Warm-water pool exercise and baths show modest short-term benefit for arthritis and some chronic pain conditions in small studies, but much of the benefit may come from the accompanying gentle exercise rather than water itself, and long-term evidence is limited.
Safety
Generally low risk. Hot water can cause dizziness, dehydration or fainting, particularly in people with heart conditions or low blood pressure.
Avoid or use caution
- Heart conditions, low blood pressure, or pregnancy — avoid very hot water and prolonged immersion
- Open wounds or skin infections
- Exit slowly to avoid dizziness or fainting
Children
Supervised warm-water play or pool exercise is generally low risk; avoid very hot water.
Pregnancy and breastfeeding
Avoid hot tubs and very hot baths; warm (not hot) water and supervised prenatal pool exercise are generally considered fine.
Historical and cultural background
Bathing for health appears across many cultures, from Roman and Ottoman bathhouses to Japanese onsen; long tradition does not by itself prove a treatment effect.
How it was traditionally prepared
European spa and bathing traditions, Japanese onsen, and Roman baths all used warm mineral or plain water for relaxation and pain relief.
Sources and further reading
- Arthritis — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Osteoarthritis — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Back pain — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Musculoskeletal / pain · Cardiovascular
Related remedies
Hyssop
Hyssopus officinalis
Traditional use — evidence not establishedAn aromatic mint-family herb with a long history in Mediterranean and Middle Eastern traditional medicine, used mainly as a tea for coughs and sore throats.
Herbs & BotanicalsTraditional European / AmericanOther Traditional SystemsSerious safety warningCough/ColdSore ThroatRead full entryClose entry
Hyssop
Hyssopus officinalis
Part used or form
Dried aerial parts (leaf and flower)
How it is used
By mouth
Also called
Hyssopus officinalis
Traditional / historical use
- Cough and chest congestion
- Sore throat
- Digestive comfort
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Hyssop has not been well studied in human clinical trials for cough or digestion; its use rests mainly on long tradition rather than clinical research.
Safety
Culinary-strength hyssop tea is generally considered low risk for short-term adult use. The concentrated essential oil is a different, more potent product; some of its chemical constituents have been linked to seizures at high concentrations, so it is not treated here as a home remedy.
Avoid or use caution
- Seizure disorders (concentrated oil)
- Do not confuse tea with concentrated essential oil
Medicine interactions
- May add to the effect of sedative medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried leaves and flowers were traditionally steeped as a tea for the throat and chest.
Sources and further reading
- Cough — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Sore throat — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Ivy Leaf
Hedera helix
Limited / mixed evidenceThe leaf of a common climbing vine, used in European herbal medicine, especially in Germany, as an ingredient in cough syrups intended to loosen mucus.
Herbs & BotanicalsTraditional European / AmericanCough/ColdRead full entryClose entry
Ivy Leaf
Hedera helix
Part used or form
Dried leaf
How it is used
By mouth
Also called
English ivy · Hedera helix
Traditional / historical use
- Cough with mucus
- Bronchial complaints
Historical use is not evidence that it works.
What has been studied
- Cough associated with bronchitis (mostly in standardized syrup products)
Current evidence label
Limited / mixed evidence
Several studies of standardized ivy leaf extract cough syrups suggest some benefit for cough related to bronchitis, but most research comes from manufactured extract products rather than home preparations, and independent confirmation is limited.
Safety
Standardized extract products used short-term appear generally well tolerated. The raw plant and berries are considered more irritating and are not the form used medicinally.
Avoid or use caution
- Raw leaves or berries, which can irritate skin and the digestive tract
- Known allergy to ivy
Medicine interactions
- Limited data; caution combining with other cough or cold medicines
Children
Some standardized ivy leaf cough syrups are marketed for children in some countries, but this library gives no amounts; ask a pediatrician before using any ivy leaf product in a child.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried leaf extracted into standardized syrups and drops; historically also brewed as a simple tea.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Cough — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Jasmine Flower
Jasminum officinale / Jasminum sambac
Limited / mixed evidenceFragrant jasmine flowers are traditionally dried and blended into tea across Asia, and jasmine-scented oil is used in aromatherapy and skin care for relaxation.
Teas & InfusionsTraditional AsianOther Traditional SystemsStress/AnxietySleepRead full entryClose entry
Jasmine Flower
Jasminum officinale / Jasminum sambac
Part used or form
Dried flower, brewed as a tea, or diluted flower-infused oil used on the skin
How it is used
By mouth
Also called
Jasmine tea · Jasminum
Traditional / historical use
- General relaxation
- Mild mood support as a fragrant beverage or scent
- Traditional use in skin oils
Historical use is not evidence that it works.
What has been studied
- Relaxation and mood (mainly via aroma studies)
Current evidence label
Limited / mixed evidence
A small number of studies on the scent of jasmine oil suggest possible mild relaxing effects, but research on jasmine tea or flower itself is limited and does not establish a treatment effect.
Safety
Jasmine tea, as a beverage, is widely consumed and generally considered safe. Diluted jasmine oil on the skin is commonly used in aromatherapy; undiluted essential oil can irritate skin and should not be swallowed.
Avoid or use caution
- Known allergy to jasmine or related plants
- Do not apply undiluted essential oil directly to skin
Children
Ordinary jasmine tea in small amounts is commonly given in some cultures, but essential oil products are not advised for children without guidance.
Pregnancy and breastfeeding
Jasmine tea is widely consumed as a beverage; concentrated essential oil use in pregnancy has not been well studied. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried flowers were traditionally blended with tea leaves, or steeped in oil for topical use.
Sources and further reading
- Stress — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Traditional medicine — fact sheet — World Health OrganizationInternational government / WHO / EMA
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep
Related remedies
Jojoba Oil
Simmondsia chinensis
Limited / mixed evidenceA liquid plant wax, chemically closer to human skin's natural sebum than most vegetable oils, used as a lightweight skin and hair conditioner.
Topical / SkinTraditional European / AmericanOther Traditional SystemsSkinRead full entryClose entry
Jojoba Oil
Simmondsia chinensis
Part used or form
Liquid wax pressed from the seed, applied to skin and hair
How it is used
On the skin
Also called
Simmondsia oil
Traditional / historical use
- Traditional Indigenous North American skin and hair care
- General moisturizing
Historical use is not evidence that it works.
What has been studied
- Mild acne and skin barrier support (small studies, often in combination products)
Current evidence label
Limited / mixed evidence
Small studies of jojoba-containing clay masks and creams suggest possible benefit for mild acne lesions and skin healing, but jojoba is usually one ingredient among several, so its individual effect is hard to isolate.
Safety
Widely used on skin and hair with a good safety record. Contact allergy is uncommon but possible; it is for external use only.
Avoid or use caution
- Known allergy to the oil
- Not for internal use
Children
Patch-test on a small area first. For infants, ask the child's doctor before applying any new product to the skin.
Pregnancy and breastfeeding
Topical use is generally considered low risk in pregnancy.
How it was traditionally prepared
Seeds have traditionally been pressed to yield a liquid wax that is applied directly or blended into balms and hair preparations.
Sources and further reading
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Acne — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Related remedies
Jujube
Ziziphus jujuba
Limited / mixed evidenceA sweet, date-like fruit used across East Asian traditional medicine and cooking, often simmered into teas and soups traditionally associated with calm and restful sleep.
Foods & Kitchen RemediesTraditional AsianSleepGeneral NutritionRead full entryClose entry
Jujube
Ziziphus jujuba
Part used or form
Dried fruit, often simmered into a tea or soup
How it is used
By mouth
Also called
Red date · Chinese date · Ziziphus
Traditional / historical use
- Traditional sleep and calming tonic
- General digestive and 'nourishing' tonic use
- Traditional support during recovery from illness
Historical use is not evidence that it works.
What has been studied
- Sleep quality (preliminary)
Current evidence label
Limited / mixed evidence
A handful of small studies, mostly from East Asia, suggest jujube-based preparations may modestly support sleep, but the research is limited in size and quality.
Safety
As a food and traditional tea ingredient, jujube is widely consumed and generally considered safe for most people in ordinary food amounts.
Avoid or use caution
- Combining with sedative or sleep medicines
Medicine interactions
- May add to the effect of sedative medicines
Children
Jujube is eaten as a fruit in many cultures; concentrated sleep-specific extracts are not advised for children without a pediatrician's guidance.
Pregnancy and breastfeeding
Jujube fruit is commonly eaten as food; concentrated extracts have not been well studied in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried jujube fruit was traditionally simmered into teas, soups, or sweet tonics, sometimes alongside other calming herbs.
Sources and further reading
- Sleep disorders — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Traditional Chinese medicine — what you need to know — NIH NCCIHU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Nervous system / sleep
Related remedies
Juniper
Juniperus communis
Traditional use — evidence not establishedThe aromatic berry-like cone best known for flavoring gin, traditionally used in small culinary amounts and, historically, as a folk diuretic and digestive aid.
Herbs & BotanicalsTraditional European / AmericanUrinaryDigestionRead full entryClose entry
Juniper
Juniperus communis
Part used or form
Dried berry (cone)
How it is used
By mouth
Also called
Juniperus communis · Juniper berry
Traditional / historical use
- Fluid retention
- Digestive complaints
- Flavoring for food and spirits
Historical use is not evidence that it works.
What has been studied
- Diuretic (urine-increasing) effect
- Blood sugar (limited preclinical interest)
Current evidence label
Traditional use — evidence not established
Juniper's traditional reputation as a mild diuretic is not well confirmed by modern human trials, and most research is limited to laboratory or animal studies.
Safety
Culinary use as a spice is considered safe. Concentrated juniper extracts or oil in larger amounts can irritate the kidneys and digestive tract.
Avoid or use caution
- Kidney disease
- Diabetes medicines
- Concentrated extracts or essential oil taken by mouth
Medicine interactions
- May add to the effect of diuretic medicines
- May affect blood sugar medicines, per limited data
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditionally avoided in pregnancy due to possible effects on the uterus. Ask a doctor or midwife before use.
How it was traditionally prepared
Dried berries used whole as a spice, brewed as tea, or distilled into gin and other spirits.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Urinary tract infections — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Urinary
Related remedies
Kale
Brassica oleracea var. sabellica
Limited / mixed evidenceA cruciferous leafy green marketed heavily as a 'superfood,' genuinely rich in vitamin K and other nutrients but not a cure for anything.
Foods & Kitchen RemediesTraditional European / AmericanTraditional African / African DiasporaHeart/CirculationGeneral NutritionRead full entryClose entry
Kale
Brassica oleracea var. sabellica
Part used or form
Leafy green vegetable, raw or cooked
How it is used
By mouth
Traditional / historical use
- An everyday leafy green vegetable, especially in Southern U.S. and European cooking
Historical use is not evidence that it works.
What has been studied
- Vitamin K and general nutrient intake as part of an overall diet
Current evidence label
Limited / mixed evidence
Kale is a genuinely nutrient-dense vegetable, part of the cruciferous family broadly linked to healthier eating patterns in population studies, but there is no reliable evidence that kale specifically produces effects beyond what other vegetables in a balanced diet provide — the 'superfood' framing outruns the evidence.
Safety
Very low risk as food. Its high, variable vitamin K content is the main safety-relevant point for people on warfarin.
Avoid or use caution
- People on warfarin — keep vitamin K–rich vegetable intake fairly consistent
Medicine interactions
- People taking the blood thinner warfarin are usually told to keep their vitamin K intake fairly steady rather than avoiding vitamin K–rich foods altogether — a sudden increase or drop can throw off dosing, so this is worth discussing with the prescribing clinician.
Children
An appropriate vegetable for children, usually served cooked and chopped fine, since raw kale can be tough to chew.
Pregnancy and breastfeeding
An ordinary, nutritious vegetable during pregnancy; no special restriction described in general nutrition guidance.
How it was traditionally prepared
Eaten raw (often massaged to soften) in salads, baked into crisps, or cooked into soups and sautés.
Sources and further reading
- Vitamin K — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular · Immune / general wellness
Related remedies
Kava
Piper methysticum
Safety concernA Pacific Island root prepared as a ceremonial and social drink, later sold in capsules for anxiety.
Herbs & BotanicalsOther Traditional SystemsHigh caution — do not self-treatSleepStress/AnxietyRead full entryClose entry
Kava
Piper methysticum
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
Part used or form
Root, prepared as a water-based drink
Also called
Kava kava · Awa · Piper methysticum
Traditional / historical use
- Community and ceremonial drink
- Calm and relaxation
- Sleep
Historical use is not evidence that it works.
What has been studied
- Anxiety
- Insomnia
Current evidence label
Safety concern
Some studies suggest kava may reduce anxiety, but severe liver injury reported with kava products dominates the picture and has led to regulatory warnings.
Safety
Linked to serious liver damage, including cases needing transplant. Also causes drowsiness, and long heavy use has been linked to a scaly skin condition.
Avoid or use caution
- Liver disease or any liver-affecting medicine
- Do not drive or operate machinery after use
- Stop and seek care for yellowing skin, dark urine or unusual tiredness
Medicine interactions
- Dangerous with alcohol
- Adds to the effect of sedatives, sleep medicines and benzodiazepines
- Adds to liver strain from other medicines
Children
Do not give kava to children.
Pregnancy and breastfeeding
Do not use in pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally the fresh or dried root was pounded and steeped in cold water and shared from a communal bowl — a water preparation, not a concentrated extract.
Sources and further reading
- Kava — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Dietary supplements — regulation and safety — U.S. Food and Drug AdministrationU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Nervous system / sleep
Kefir
Limited / mixed evidenceA tangy fermented milk drink from the Caucasus region, fermented with a more varied mix of bacteria and yeast than most yogurt.
Foods & Kitchen RemediesOther Traditional SystemsTraditional European / AmericanDigestionGeneral NutritionRead full entryClose entry
Kefir
Part used or form
Fermented milk drink, made with kefir grains (a culture of bacteria and yeast)
How it is used
By mouth
Also called
Milk kefir · Kefir grains
Traditional / historical use
- A traditional fermented drink of the Caucasus and Central Asia
- Everyday dairy food
Historical use is not evidence that it works.
What has been studied
- Gut bacteria composition
- Digestive comfort in small trials
Current evidence label
Limited / mixed evidence
Like other fermented dairy, kefir contains live microbial cultures that NIH sources describe as having modest, strain-specific effects on digestion in some people; kefir itself has fewer large human trials than yogurt.
Safety
Made from milk, so it is not suitable for a milk allergy and needs care with lactose intolerance (fermentation reduces but does not remove all lactose). People who are severely immunocompromised (for example, during chemotherapy, after a transplant, or with advanced HIV) should ask their doctor before eating foods with live active cultures, since rare infections from food-borne organisms have been reported in this group.
Avoid or use caution
- Milk allergy
- Lactose intolerance — fermentation lowers but does not eliminate lactose
- Severely immunocompromised — ask a doctor first
Children
Ordinary fermented dairy food for children without a milk allergy.
Pregnancy and breastfeeding
Pasteurized kefir is an ordinary dairy food; unpasteurized versions carry the usual pregnancy caution about unpasteurized dairy.
How it was traditionally prepared
Made by fermenting milk with kefir grains (a living culture of bacteria and yeast) at room temperature for about a day, then straining.
Sources and further reading
- Probiotics — what you need to know — NIH NCCIHU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Kimchi
Traditional use — evidence not establishedA staple of Korean cuisine — vegetables salted, seasoned, and fermented — eaten with almost every meal and increasingly studied as a fermented food.
Foods & Kitchen RemediesTraditional AsianDigestionGeneral NutritionRead full entryClose entry
Kimchi
Part used or form
Fermented, seasoned vegetables — usually cabbage or radish
How it is used
By mouth
Also called
Korean fermented cabbage
Traditional / historical use
- A daily side dish in Korean cuisine for centuries
- Traditional winter food preservation
Historical use is not evidence that it works.
What has been studied
- Gut bacteria composition
- Metabolic markers in small trials
Current evidence label
Traditional use — evidence not established
Kimchi carries live fermentation cultures like other fermented vegetables, and small studies have looked at effects on gut bacteria and metabolic markers, but the research base specific to kimchi is still small and does not establish it as a treatment for any condition.
Safety
Traditional kimchi is often high in sodium from salting, which matters for people managing blood pressure. People who are severely immunocompromised (for example, during chemotherapy, after a transplant, or with advanced HIV) should ask their doctor before eating foods with live active cultures, since rare infections from food-borne organisms have been reported in this group.
Avoid or use caution
- High blood pressure — kimchi is typically high in sodium
- Severely immunocompromised — ask a doctor first
- Very spicy versions may irritate reflux or a sensitive stomach
Children
Ordinary fermented vegetable food; spice level and sodium content are the main things to consider for young children.
Pregnancy and breastfeeding
Well-fermented, properly stored kimchi is commonly eaten in pregnancy in Korean food culture; spice tolerance and sodium intake are the main personal considerations.
How it was traditionally prepared
Cabbage or radish is salted, mixed with chili, garlic, ginger, and other seasonings, and left to ferment for days to weeks.
Sources and further reading
- Probiotics — what you need to know — NIH NCCIHU.S. federal health source
- High blood pressure — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Kiwi
Actinidia deliciosa
Some evidenceA fruit unusually rich in vitamin C and dietary fibre for its size, native to East Asia and now grown widely.
Foods & Kitchen RemediesTraditional AsianOther Traditional SystemsDigestionGeneral NutritionRead full entryClose entry
Kiwi
Actinidia deliciosa
Part used or form
Whole fresh fruit, usually peeled
How it is used
By mouth
Also called
Kiwifruit · Kiwi fruit · Chinese gooseberry
Traditional / historical use
- Everyday eating
Historical use is not evidence that it works.
What has been studied
- Vitamin C and fibre intake as part of overall diet
- Small studies on kiwi and bowel regularity
Current evidence label
Some evidence
Kiwi provides more vitamin C by weight than many other common fruits, along with meaningful fibre. Small clinical studies suggest eating kiwi may help with mild constipation, consistent with its fibre content, though it is not a substitute for medical care of ongoing bowel problems.
Safety
Safe as food for most people, but kiwi is a recognized food allergen that can cause anything from mild mouth itching to, rarely, a serious allergic reaction.
Avoid or use caution
- Known kiwi allergy, which ranges from mild oral itching to rare severe reactions
Children
Kiwi allergy can appear in children; introduce it like other new allergenic foods, in small amounts, and watch for reaction. Slice rather than serve whole to reduce choking risk in toddlers.
Pregnancy and breastfeeding
Ordinary food during pregnancy with no established restriction.
How it was traditionally prepared
Eaten fresh, peeled and sliced, or added to fruit salads.
Sources and further reading
- Vitamin C — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Food allergy — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Immune / general wellness
Related remedies
Kola Nut
Cola acuminata / Cola nitida
Traditional use — evidence not establishedA caffeine-containing nut chewed across West Africa for its stimulant effect and used ceremonially at gatherings, weddings and as a gesture of hospitality.
Herbs & BotanicalsTraditional African / African DiasporaOtherRead full entryClose entry
Kola Nut
Cola acuminata / Cola nitida
Part used or form
Fresh or dried nut, chewed or ground
How it is used
By mouth
Also called
Cola nut · Bissy nut · Guru nut · Gbanja
Traditional / historical use
- Chewed for alertness and to ease fatigue on long journeys or work
- Ceremonial offering and symbol of hospitality and welcome in West African cultures
- Traditional use for digestion and to suppress appetite or cough
Historical use is not evidence that it works.
What has been studied
- Caffeine content and stimulant effects
- History as a flavoring source in early cola beverages
Current evidence label
Traditional use — evidence not established
Kola nut's stimulant effect is explained by its caffeine content, which is well studied in general, but there is little modern clinical research on kola nut itself as a treatment for any condition.
Safety
Kola nut's caffeine can cause the same effects as coffee — jitteriness, faster heart rate, and trouble sleeping — and habitual chewing has been linked to gum and tooth staining and irritation.
Avoid or use caution
- Heart rhythm problems or high blood pressure
- Anxiety or sleep problems, which caffeine can worsen
- People sensitive to caffeine
Medicine interactions
- Combines with other caffeine sources (coffee, tea, energy drinks) to raise total caffeine intake
- May add to the effects of stimulant medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Contains caffeine, which is generally advised to be limited in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
Historical and cultural background
Kola nut has a long documented role in West African social and ceremonial life — presented to guests, used in naming and wedding ceremonies, and chewed communally — and it was later a flavoring ingredient in early cola soft drinks; its cultural importance does not by itself establish a medicinal effect.
How it was traditionally prepared
Traditionally chewed fresh or dried, alone or split and shared among guests as a gesture of welcome.
Sources and further reading
- Caffeine — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary and herbal supplements — what to know — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Cardiovascular
Related remedies
Kudzu
Pueraria montana var. lobata
Limited / mixed evidenceA fast-growing vine whose root has long been used in Chinese herbal medicine, more recently studied in small trials for alcohol cravings.
Herbs & BotanicalsTraditional AsianMetabolic/Blood SugarMenstrual/MenopauseOtherRead full entryClose entry
Kudzu
Pueraria montana var. lobata
Part used or form
Dried root
How it is used
By mouth
Also called
Kudzu root · Ge gen
Traditional / historical use
- Fevers and colds
- Digestive upset
- Muscle tension
- General 'cooling' tonic use
Historical use is not evidence that it works.
What has been studied
- Reducing alcohol cravings/intake
- Menopausal symptoms (isoflavone content)
Current evidence label
Limited / mixed evidence
A handful of small human studies looked at kudzu extract for heavy drinking and found modest reductions in beer intake in lab settings; results are preliminary and have not been confirmed in larger trials.
Safety
Short-term use in studies has been reasonably well tolerated, though kudzu contains plant estrogens (isoflavones) similar to soy, and its interactions are not fully mapped.
Avoid or use caution
- Hormone-sensitive conditions (e.g. certain breast or uterine conditions)
- Diabetes medicines, due to possible blood sugar effects
Medicine interactions
- May add to the effect of estrogen-sensitive medicines or hormone therapy
- May affect how the liver processes some medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Its plant-estrogen content is a particular reason for caution.
How it was traditionally prepared
Dried root has traditionally been sliced and simmered into a decoction or ground into a starch/powder.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary supplements — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Metabolic · Reproductive / menstrual / menopause
Related remedies
Lavender
Lavandula angustifolia
Limited / mixed evidenceA Mediterranean flower used for scent, linens, baths and calm across Europe and North Africa.
Oils & AromaticsTraditional European / AmericanSerious safety warningSleepStress/AnxietyPainSkinRead full entryClose entry
Lavender
Lavandula angustifolia
Part used or form
Flowers and essential oil
Also called
English lavender · Lavandula
Traditional / historical use
- Calm and sleep
- Headache
- Bath and linen scenting
- Minor skin irritation
Historical use is not evidence that it works.
What has been studied
- Anxiety
- Sleep
- Hair loss (topical)
- Mood during procedures
Current evidence label
Limited / mixed evidence
Some small studies of lavender aromatherapy and oral preparations report calming effects, but the research is limited and results are mixed.
Safety
Aroma use is generally low-risk. Applied to skin the essential oil can irritate or sensitise, and swallowing essential oil can be toxic. Reports have linked topical lavender and tea tree oil to breast tissue growth in some boys.
Avoid or use caution
- Never swallow lavender essential oil
- Dilute before skin use and patch-test
- Keep essential oil bottles away from children
Medicine interactions
- May add to the effect of sedatives
Children
Essential oils can be toxic if swallowed and are not a children's medicine. Keep them locked away.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried flowers were sewn into sachets, brewed as a mild tea, added to baths, and distilled into oil.
Sources and further reading
- Lavender — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Skin · Nervous system / sleep · Musculoskeletal / pain
Leafy Green Vegetables
Some evidenceSpinach, kale, collards, chard and their relatives — a vegetable group recommended across nearly every dietary tradition and one of the most nutrient-dense ordinary foods.
Foods & Kitchen RemediesTraditional African / African DiasporaTraditional European / AmericanTraditional AsianOther Traditional SystemsHeart/CirculationGeneral NutritionRead full entryClose entry
Leafy Green Vegetables
Part used or form
Leaves — raw in salads or cooked
How it is used
By mouth
Also called
Spinach · Kale · Collard greens · Swiss chard · Dark leafy greens
Traditional / historical use
- A dietary staple across essentially all food cultures
- Traditional greens and pot-liquor dishes in African diaspora cooking
Historical use is not evidence that it works.
What has been studied
- Overall diet quality
- Blood pressure as part of a vegetable-rich diet
Current evidence label
Some evidence
Diets higher in vegetables, including leafy greens, are consistently linked by health agencies to lower blood pressure and better overall cardiovascular health, largely through their fiber, potassium, and low calorie density rather than any single nutrient acting like a drug.
Safety
Very low risk as food for most people. Leafy greens are naturally high in vitamin K, which affects how warfarin works — the concern is inconsistent intake, not eating greens at all.
Avoid or use caution
- Warfarin or other vitamin K-sensitive blood thinners — keep intake consistent rather than avoiding greens or eating them unpredictably
Medicine interactions
- Vitamin K in leafy greens can reduce the effect of warfarin if intake swings a lot from week to week; keeping intake fairly steady is the usual advice, and any big diet change should be discussed with the prescriber
Children
Ordinary and encouraged vegetable food for children.
Pregnancy and breastfeeding
Ordinary and encouraged vegetable food during pregnancy, also a food source of folate.
How it was traditionally prepared
Eaten raw in salads, steamed, sautéed, or simmered for a long time in soups and pot dishes.
Sources and further reading
- High blood pressure — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular
Related remedies
Legumes and Beans
Some evidenceBeans, lentils, chickpeas, and peas — an inexpensive, fiber- and protein-rich food group central to diets on every continent.
Foods & Kitchen RemediesTraditional African / African DiasporaTraditional AsianOther Traditional SystemsTraditional European / AmericanDigestionHeart/CirculationMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Legumes and Beans
Part used or form
Dried or canned beans, lentils, chickpeas, and peas, cooked before eating
How it is used
By mouth
Also called
Beans · Lentils · Chickpeas · Peas · Pulses
Traditional / historical use
- A dietary staple across most food cultures for millennia
- A meat alternative and stretcher in traditional cooking
Historical use is not evidence that it works.
What has been studied
- Blood cholesterol
- Blood sugar response after meals
- Regularity
Current evidence label
Some evidence
Legumes are high in soluble fiber and plant protein, and health agencies link diets rich in legumes to healthier cholesterol and steadier blood sugar, as part of overall eating patterns rather than as a stand-alone treatment.
Safety
Very low risk as a cooked food. Dried beans must be properly cooked (soaked and boiled) because raw or undercooked kidney beans in particular contain a natural toxin that causes vomiting and diarrhea; canned or fully cooked beans do not have this problem. Beans commonly cause gas and bloating, which usually eases with regular eating.
Avoid or use caution
- Raw or undercooked dried kidney beans — must be soaked and fully boiled, not slow-cooked at low heat from raw
- Increase intake gradually to reduce gas and bloating
Children
Ordinary and nutritious food for children once mashed or cut appropriately for age to avoid choking on whole beans in very young children.
Pregnancy and breastfeeding
Ordinary and encouraged food; properly cooked beans are a good plant protein and fiber source in pregnancy.
How it was traditionally prepared
Soaked and boiled from dried, or used from cans; simmered into soups, stews, and dals across many cuisines.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- How to lower cholesterol with diet — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary proteins — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular · Metabolic
Related remedies
Lemon Balm
Melissa officinalis
Limited / mixed evidenceA lemon-scented mint-family herb long used in European traditional medicine to ease nervous tension and support sleep and digestion.
Herbs & BotanicalsTraditional European / AmericanSleepStress/AnxietyDigestionRead full entryClose entry
Lemon Balm
Melissa officinalis
Part used or form
Fresh or dried leaf
How it is used
By mouth
Also called
Melissa officinalis · Melissa
Traditional / historical use
- Mild nervous tension
- Sleep support
- Digestive discomfort
Historical use is not evidence that it works.
What has been studied
- Mild anxiety and stress
- Sleep quality
- Cold sores (as a topical cream, a different preparation)
Current evidence label
Limited / mixed evidence
Small trials suggest lemon balm, often combined with other calming herbs, may modestly ease stress or improve sleep for some people, but studies are small and results are inconsistent.
Safety
Lemon balm tea and culinary use are widely considered low risk. It can cause drowsiness and, rarely, has been linked to thyroid effects in animal studies.
Avoid or use caution
- Thyroid conditions, per limited data
- Before surgery, due to possible sedative effect
Medicine interactions
- May add to the effect of sedative medicines and alcohol
- May interact with thyroid medicines, per limited data
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh or dried leaves steeped as a tea, or used fresh in cooking; also made into tinctures and topical creams for cold sores.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Anxiety — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Nervous system / sleep
Related remedies
Lemon Balm Tea
Melissa officinalis
Limited / mixed evidenceA lemon-scented mint-family leaf steeped into a mild, calming tea traditionally used in the evening or after a meal.
Teas & InfusionsTraditional European / AmericanSleepStress/AnxietyRead full entryClose entry
Lemon Balm Tea
Melissa officinalis
Part used or form
Dried or fresh leaves steeped in hot water
How it is used
By mouth
Also called
Melissa tea
Traditional / historical use
- Mild nervous tension
- Sleep support
- Upset stomach
Historical use is not evidence that it works.
What has been studied
- Mild anxiety and stress
- Sleep quality
Current evidence label
Limited / mixed evidence
Small studies, mostly using concentrated lemon balm extracts rather than tea, suggest a mild calming effect. Direct evidence on the brewed tea itself is limited.
Safety
Generally well tolerated as a tea; occasional drowsiness or stomach upset.
Avoid or use caution
- Before surgery — may add to sedative effects
- Thyroid conditions — ask a doctor
Medicine interactions
- May add to the effect of sedatives
- Thyroid medicine — theoretical interaction discussed in some sources
Children
A weak lemon balm tea is a traditional calming drink in some households; ask a pediatrician before regular use in young children.
Pregnancy and breastfeeding
Limited safety data specific to pregnancy; ask a clinician before regular use.
How it was traditionally prepared
Fresh or dried leaves steeped in hot water, sometimes blended with chamomile or mint.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Nervous system / sleep
Lemon Verbena
Aloysia citrodora
Traditional use — evidence not establishedA lemon-scented South American shrub whose leaves are widely drunk as a calming, citrusy herbal tea in Europe and Latin America.
Teas & InfusionsTraditional European / AmericanOther Traditional SystemsDigestionStress/AnxietyRead full entryClose entry
Lemon Verbena
Aloysia citrodora
Part used or form
Dried leaf, brewed as tea
How it is used
By mouth
Also called
Verbena citriodora · Cedron
Traditional / historical use
- Mild digestive upset
- Relaxation after meals
- Mild stress or restlessness
Historical use is not evidence that it works.
What has been studied
- Muscle soreness/inflammation markers (small trials)
- Antioxidant content of the leaf extract
Current evidence label
Traditional use — evidence not established
Lemon verbena leaf is rich in polyphenols and has been tested in a few small studies for exercise-related soreness, but human evidence for any specific benefit remains preliminary.
Safety
As a brewed tea, lemon verbena is widely consumed and generally considered well tolerated; concentrated extracts are less studied.
Avoid or use caution
- Concentrated extracts or essential oil rather than tea, due to thinner safety data
Medicine interactions
- Limited data; caution combining concentrated extracts with sedatives is reasonable given its traditional calming use
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditional culinary-strength tea use is common in some cultures, but concentrated extracts have not been well studied in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh or dried leaves have traditionally been steeped in hot water as an infusion.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Indigestion — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Nervous system / sleep
Related remedies
Lemongrass
Cymbopogon citratus
Traditional use — evidence not establishedA citrus-scented grass central to Southeast Asian, Caribbean, Latin American and African cooking and folk medicine, often called 'fever grass' and brewed as an everyday tea.
Herbs & BotanicalsTraditional AsianTraditional African / African DiasporaOther Traditional SystemsDigestionCough/ColdRead full entryClose entry
Lemongrass
Cymbopogon citratus
Part used or form
Fresh or dried leaf/stalk
How it is used
By mouth
Also called
Cymbopogon citratus · Fever grass
Traditional / historical use
- Everyday beverage tea
- Traditionally used for fevers and colds
- Digestive complaints
Historical use is not evidence that it works.
What has been studied
- Anxiety and mood (limited studies)
- Cholesterol
- Antimicrobial effects (mostly laboratory studies)
Current evidence label
Traditional use — evidence not established
Lemongrass is widely used as food and folk tea, but there is little rigorous human research confirming specific health effects; most supportive data comes from laboratory studies, not clinical trials.
Safety
Lemongrass tea is widely consumed and generally considered safe. Concentrated lemongrass oil taken by mouth is more concerning and not the same preparation as tea.
Avoid or use caution
- Concentrated essential oil taken by mouth
- Known allergy to lemongrass
Medicine interactions
- Limited data; caution combining concentrated extracts with diabetes or cholesterol medicines
Children
Lemongrass tea is consumed as a mild household beverage in many cultures in modest amounts; concentrated extracts or oil are not a children's remedy.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh or dried stalks and leaves steeped as tea, or used fresh in cooking soups, curries and marinades.
Sources and further reading
- Lemongrass — MSK About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Nervous system / sleep
Related remedies
Lemongrass Tea
Cymbopogon citratus
Traditional use — evidence not establishedA citrus-scented grass steeped as a household tea across many cuisines, distinct from lemongrass essential oil, which is far more concentrated and not meant to be swallowed.
Teas & InfusionsTraditional AsianTraditional African / African DiasporaDigestionCough/ColdRead full entryClose entry
Lemongrass Tea
Cymbopogon citratus
Part used or form
Fresh or dried leaf and stalk steeped as a hot-water infusion
How it is used
By mouth
Also called
Cymbopogon tea
Traditional / historical use
- Digestive comfort
- Colds and mild fevers
- Everyday refreshment
Historical use is not evidence that it works.
What has been studied
- Anxiety (very limited, small studies)
Current evidence label
Traditional use — evidence not established
Lemongrass tea has a long history as a household remedy, but clinical research on the brewed infusion in people is very limited, so traditional digestive and calming uses remain unproven.
Safety
Brewed lemongrass tea from the leaf and stalk is widely used as a beverage and considered low risk for most adults. This is distinct from concentrated lemongrass essential oil, which is not meant to be swallowed.
Avoid or use caution
- Do not confuse with or substitute essential oil for tea
- Pregnancy — some traditional sources caution against large amounts
Medicine interactions
- Limited data; caution with diabetes medicines given mild effects on blood sugar noted in preliminary research
Children
Herbal and specialty teas are not advised as a home remedy for infants and young children. Ask the child's doctor first, and keep any caffeine-containing tea away from young children.
Pregnancy and breastfeeding
Some traditional systems caution against large amounts in pregnancy. Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh or dried stalks and leaves have traditionally been bruised, simmered or steeped in hot water and strained before drinking.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Traditional medicine — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Respiratory
Related remedies
Lemons and Limes
Citrus limon / Citrus aurantiifolia
Some evidenceSharply sour citrus fruits used mainly as flavoring and a source of vitamin C; popular claims that lemon water detoxifies the body or burns fat go beyond the evidence.
Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianOther Traditional SystemsGeneral NutritionSore ThroatRead full entryClose entry
Lemons and Limes
Citrus limon / Citrus aurantiifolia
Part used or form
Juice, zest, or whole fruit
How it is used
By mouth
Also called
Lemon · Lime · Lemon water · Lemon juice
Traditional / historical use
- Flavoring food and drinks
- Historical use by sailors to prevent scurvy on long voyages
- A warm honey-lemon drink for sore throat comfort
Historical use is not evidence that it works.
What has been studied
- Vitamin C intake
- Historical prevention of scurvy
Current evidence label
Some evidence
Lemons and limes are a good source of vitamin C and were central to preventing scurvy in the era before the vitamin was identified — a genuine and well-documented use. Modern claims that lemon water "detoxifies" the liver, alkalizes the body, or burns fat are marketing claims not supported by nutrition science; the body's own liver and kidneys manage detoxification without help from lemon juice.
Safety
Safe as food for almost everyone. Concentrated lemon or lime juice is acidic enough to erode tooth enamel and can irritate mouth sores or reflux; undiluted juice held against the skin (as in some folk remedies) plus sun exposure can cause a skin burn.
Avoid or use caution
- Frequent undiluted juice can erode tooth enamel — rinse the mouth or dilute in water
- Applying lime or lemon juice to skin before sun exposure can cause a chemical burn (phytophotodermatitis)
Children
Diluted lemon or lime juice in food or drink is fine for most children; undiluted juice is harsh on a child's mouth and teeth and there is no established reason to give it as a remedy.
Pregnancy and breastfeeding
Ordinary flavoring use in food and drink during pregnancy is fine; there is no established therapeutic reason to drink large amounts of concentrated juice.
How it was traditionally prepared
Juiced fresh, zested for flavor, or historically carried as juice to prevent scurvy at sea.
Sources and further reading
- Vitamin C — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Immune / general wellness
Related remedies
Lentils
Lens culinaris
Some evidenceA quick-cooking pulse and staple across South Asian, Middle Eastern and Mediterranean cooking, discussed in nutrition guidance mainly for fiber, plant protein and iron.
Foods & Kitchen RemediesTraditional AsianOther Traditional SystemsTraditional European / AmericanDigestionMetabolic/Blood SugarHeart/CirculationGeneral NutritionRead full entryClose entry
Lentils
Lens culinaris
Part used or form
Dried seed (legume), cooked whole or split
How it is used
By mouth
Also called
Dal · Masoor · Red lentils · Green lentils
Traditional / historical use
- Everyday staple food, especially in South Asian and Middle Eastern cooking
- A meat substitute in vegetarian and vegan eating
Historical use is not evidence that it works.
What has been studied
- Fiber intake and digestive regularity
- Iron intake in plant-based diets
- Blood sugar response as part of an overall diet
Current evidence label
Some evidence
General nutrition guidance lists lentils among fiber-rich, protein-rich plant foods linked to healthier cholesterol and blood sugar patterns when they are part of an overall diet. Plant (non-heme) iron in lentils is less readily absorbed than iron from meat, which matters for anyone relying on plant foods for iron.
Safety
Very low risk as food for most people. Like other legumes, lentils can cause gas or bloating, and dried lentils should be cooked before eating.
Avoid or use caution
- Increase legume intake gradually to reduce gas and bloating
- People with iron-deficiency anemia relying on plant iron sources may need medical guidance on absorption
Children
Well-cooked, soft lentils (as in dal or soup) are an appropriate early food; texture should be soft enough to avoid choking risk in infants and toddlers.
Pregnancy and breastfeeding
A nutritious source of plant protein, fiber and iron during pregnancy as part of a balanced diet; no special restriction is described in general nutrition guidance.
How it was traditionally prepared
Simmered into soups, stews and dals, or cooked and mashed into spreads; typically split or whole, never eaten raw.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Iron — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Anemia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular · Metabolic
Related remedies
Licorice Root
Glycyrrhiza glabra
Safety concernA sweet root used in Chinese herbal formulas, Middle Eastern drinks and European confectionery.
Herbs & BotanicalsTraditional AsianTraditional European / AmericanHigh caution — do not self-treatDigestionCough/ColdSore ThroatRead full entryClose entry
Licorice Root
Glycyrrhiza glabra
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
Part used or form
Root, and deglycyrrhizinated (DGL) preparations
Also called
Liquorice · Gan cao · Sweet root
Traditional / historical use
- Cough and sore throat
- Stomach complaints
- Sweetener and flavouring
Historical use is not evidence that it works.
What has been studied
- Indigestion and ulcers
- Canker sores
- Cough
Current evidence label
Safety concern
Evidence for licorice as a treatment is limited, while the risk from glycyrrhizin — the sweet compound — is well documented.
Safety
Regular use of glycyrrhizin-containing licorice can raise blood pressure, lower potassium and cause irregular heartbeat, muscle weakness and swelling. Cases of serious harm have followed heavy black licorice candy eating.
Avoid or use caution
- High blood pressure, heart disease, kidney disease, low potassium
- Do not eat large amounts of black licorice candy regularly
- Adults over 40 in particular have been warned about heart rhythm effects
Medicine interactions
- Lowers potassium — risky with diuretics, digoxin and corticosteroids
- May reduce the effect of blood-pressure medicines
- May affect several medicines processed by the liver
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Avoid — heavy licorice use in pregnancy has been linked to harm. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Root was chewed, simmered in formulas as a harmonising herb, and boiled down into confectionery.
Sources and further reading
- Licorice root — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Dietary supplements — regulation and safety — U.S. Food and Drug AdministrationU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Respiratory
Licorice Root Tea
Glycyrrhiza glabra
Limited / mixed evidenceA brewed infusion of dried licorice root, sweeter and generally more concentrated in the root's natural glycyrrhizin than licorice-flavored candy, with real safety limits that apply specifically to drinking it regularly.
Teas & InfusionsTraditional AsianTraditional European / AmericanHigh caution — do not self-treatSore ThroatCough/ColdHeart/CirculationRead full entryClose entry
Licorice Root Tea
Glycyrrhiza glabra
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Regular use can raise blood pressure and lower potassium, which can affect heart rhythm
Part used or form
Dried root steeped or simmered as a hot-water infusion
How it is used
By mouth
Also called
Liquorice tea · Glycyrrhiza tea
Traditional / historical use
- Sore throat and cough
- Digestive discomfort
- Traditional Chinese medicine formulas
Historical use is not evidence that it works.
What has been studied
- Cough and throat irritation (small studies, often combined with other herbs)
Current evidence label
Limited / mixed evidence
Some small studies support a soothing effect on cough and throat irritation, often in combination products, but there is not enough dedicated research on brewed licorice root tea alone to call it a proven remedy.
Safety
This is a plant where the safety concern is squarely about drinking it, not about topical use. Regularly drinking licorice root tea over time can raise blood pressure and lower blood potassium levels, which in turn can cause muscle weakness or abnormal heart rhythms. Occasional weak tea is a different picture from daily regular drinking, but anyone with high blood pressure, heart or kidney disease should be cautious and check with a clinician.
Avoid or use caution
- High blood pressure
- Heart disease or arrhythmia
- Kidney disease
- Low potassium levels
- Pregnancy
- Long-term daily use of regular (non-DGL) licorice root
Medicine interactions
- Can raise blood pressure and counteract blood pressure medicines
- Can lower potassium, which interacts with digoxin and some diuretics
- May affect hormone-sensitive conditions
Children
Not advised as a home remedy for children without a doctor's guidance, given the blood pressure and potassium concerns.
Pregnancy and breastfeeding
Not advised in pregnancy; some research links frequent licorice intake in pregnancy to possible effects on the pregnancy. Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried root has traditionally been sliced or cut and simmered or steeped in hot water, sometimes combined with other soothing herbs.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- High blood pressure — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Potassium — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Respiratory · Cardiovascular
Related remedies
Light Therapy for Seasonal Low Mood
Some evidenceSitting near a bright therapeutic light box, usually in the morning, most studied for seasonal patterns of low mood that recur in fall and winter.
Mind-Body / Non-Drug PracticesTraditional European / AmericanStress/AnxietyOtherRead full entryClose entry
Light Therapy for Seasonal Low Mood
Part used or form
Sitting near a bright therapeutic light box for a period each day, typically in the morning
How it is used
Whole-body practice — daily light exposure using a specialized light box
Also called
Bright light therapy · Light box therapy · Phototherapy for SAD
Traditional / historical use
No documented traditional use recorded here.
Historical use is not evidence that it works.
What has been studied
- Seasonal affective disorder (seasonal depression)
- Some non-seasonal depression as an add-on
- Circadian rhythm disruption
Current evidence label
Some evidence
Bright light therapy has reasonable clinical evidence for easing symptoms of seasonal affective disorder, with effects seen within a couple of weeks in many studies; evidence for using it in non-seasonal depression is less consistent and usually studied as an add-on to other treatment.
Safety
Generally well tolerated. Eye strain, headache, and mild agitation or trouble sleeping (if used too late in the day) can occur.
Avoid or use caution
- Bipolar disorder — light therapy can potentially trigger manic symptoms; use only with clinician guidance
- Eye conditions such as retinal disease, or medicines that increase light sensitivity — check with a doctor first
- Avoid looking directly into the light source
Medicine interactions
- Certain medications and skin or eye conditions increase light sensitivity — check with a prescriber or eye doctor first
Children
Not well studied in children; use only under a pediatric clinician's guidance.
Pregnancy and breastfeeding
Considered a reasonable non-drug option for some perinatal mood symptoms, but use under a clinician's guidance.
How it was traditionally prepared
Modern light-box therapy was developed in the 1980s alongside the description of seasonal affective disorder.
Sources and further reading
- Seasonal affective disorder — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Depression — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep
Linden Flower
Tilia spp.
Traditional use — evidence not establishedThe pale, fragrant flowers of the linden (lime) tree, long brewed as a bedtime and cold-season tea across Europe.
Teas & InfusionsTraditional European / AmericanSleepCough/ColdStress/AnxietyRead full entryClose entry
Linden Flower
Tilia spp.
Part used or form
Dried flower, brewed as tea
How it is used
By mouth
Also called
Lime flower · Tilia · Tilleul
Traditional / historical use
- Mild sleeplessness or nervous tension
- Colds and fevers
- Mild digestive discomfort
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Linden flower has a long folk history as a calming, sweat-inducing tea for colds, but rigorous human research on its effects is lacking.
Safety
Linden flower tea is widely consumed and generally considered well tolerated for occasional use; regular heavy use has been mentioned in older sources as a possible strain on the heart, though this is not well documented in modern research.
Avoid or use caution
- Existing heart conditions, given old cautions about heavy long-term use
Medicine interactions
- May add to the effect of sedatives, due to its traditional calming use
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Occasional culinary-strength tea is widely consumed, but there is little formal safety research. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried flower clusters have traditionally been steeped in hot water as an infusion.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Traditional medicine — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Respiratory · Nervous system / sleep
Related remedies
Linden Tea
Tilia spp.
Traditional use — evidence not establishedA mild, fragrant infusion from the flowers of the linden (lime) tree, a European folk remedy unrelated to citrus limes.
Teas & InfusionsTraditional European / AmericanSleepStress/AnxietyCough/ColdRead full entryClose entry
Linden Tea
Tilia spp.
Part used or form
Dried flower and bract steeped as a hot-water infusion
How it is used
By mouth
Also called
Tilia tea · Lime flower tea (linden, not citrus)
Traditional / historical use
- Calming before sleep
- Colds and mild fevers
- Nervous tension
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Linden flower has a long history of folk use in Europe, but there is little modern clinical research on the brewed tea, so claims of calming or cold-easing effects remain traditional rather than proven.
Safety
Widely used as an everyday beverage and generally considered low risk for most adults in typical tea amounts. Frequent heavy use over long periods has been linked in some traditional sources to possible heart strain, so it is best treated as an occasional drink rather than a daily habit.
Avoid or use caution
- Existing heart conditions with frequent, heavy long-term use
- Sedative medicines
Medicine interactions
- May add to the effect of sedatives with heavy use
Children
Herbal and specialty teas are not advised as a home remedy for infants and young children. Ask the child's doctor first, and keep any caffeine-containing tea away from young children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried flowers with their attached leafy bract have traditionally been steeped in hot water and strained before drinking.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Healthy sleep — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Respiratory · Nervous system / sleep
Related remedies
Lion's Mane Mushroom
Hericium erinaceus
Limited / mixed evidenceA shaggy white culinary mushroom traditionally eaten in Chinese and Japanese cooking, now widely sold as a brain-health supplement.
Herbs & BotanicalsTraditional AsianSerious safety warningGeneral NutritionOtherRead full entryClose entry
Lion's Mane Mushroom
Hericium erinaceus
Part used or form
Fresh or dried fruiting body, cooked as food or taken as a powder or extract
How it is used
By mouth
Also called
Hericium erinaceus · Bearded tooth fungus · Yamabushitake
Traditional / historical use
- A culinary mushroom in Chinese and Japanese cooking
- A digestive and general-wellness food in East Asian folk practice
Historical use is not evidence that it works.
What has been studied
- Nerve growth factor stimulation in laboratory and animal studies
- Memory, mood and mild cognitive symptoms in a small number of human trials
Current evidence label
Limited / mixed evidence
Laboratory studies show lion's mane extracts can stimulate nerve growth factor and related pathways, and a handful of small human trials have looked at memory, mood and mild cognitive complaints with encouraging but inconsistent results. Larger, longer trials are needed before it can be called an established treatment for any brain condition.
Safety
As a cooked food, lion's mane is considered safe for most people. Supplement extracts have caused rare allergic reactions, including skin rash and breathing difficulty in sensitive individuals.
Avoid or use caution
- Known mushroom allergy
- Bleeding disorders or upcoming surgery
- Diabetes medicines
Medicine interactions
- May affect blood sugar; caution alongside diabetes medicines
- May add to the effect of blood thinners in theory
Children
As an occasional cooked food, lion's mane is generally fine; concentrated supplement extracts have not been studied in children and are not recommended for them.
Pregnancy and breastfeeding
Cooked as an ordinary food it is not known to pose special risk, but concentrated extracts have not been studied in pregnancy or breastfeeding and are best avoided.
How it was traditionally prepared
Traditionally sliced and cooked like other mushrooms in soups and stir-fries; modern supplements grind the dried fruiting body or mycelium into powder or extract.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Dietary and herbal supplements — what to know — NIH NCCIHU.S. federal health source
- Traditional, complementary and integrative medicine — health topic — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Nervous system / sleep · Immune / general wellness
Maca
Lepidium meyenii
Limited / mixed evidenceA turnip-like root grown high in the Peruvian Andes, eaten as a staple food for centuries and marketed today for energy, fertility and libido.
Herbs & BotanicalsOther Traditional SystemsMenstrual/MenopauseGeneral NutritionRead full entryClose entry
Maca
Lepidium meyenii
Part used or form
Dried root (often powdered)
How it is used
By mouth
Also called
Lepidium meyenii · Peruvian ginseng
Traditional / historical use
- Traditional Andean food staple
- Traditionally used for energy and fertility
Historical use is not evidence that it works.
What has been studied
- Sexual function and libido
- Menopausal symptoms
- Athletic performance and energy
Current evidence label
Limited / mixed evidence
Some small trials suggest maca may modestly improve libido or menopausal symptoms for some people, but studies are few, short and often industry-funded, so the evidence is not considered strong.
Safety
Eating maca as a food is well established and generally considered safe. Less is known about the safety of concentrated supplement doses used long-term.
Avoid or use caution
- Thyroid conditions, per some traditional sources, since maca is a cruciferous plant
- Hormone-sensitive conditions
Medicine interactions
- Limited data; caution in hormone-sensitive conditions given maca's effect on the endocrine system, per some sources
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried root traditionally roasted or boiled and eaten, or fermented into a beverage; modern forms are powder and capsules.
Sources and further reading
- Maca — MSK About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Menopause — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Reproductive / menstrual / menopause · Immune / general wellness
Related remedies
Mace
Myristica fragrans
Traditional use — evidence not establishedThe dried, lacy red covering that surrounds the nutmeg seed, sharing the nutmeg tree's aromatic compounds and its need for caution in large amounts.
Herbs & BotanicalsTraditional AsianHigh caution — do not self-treatDigestionRead full entryClose entry
Mace
Myristica fragrans
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Nutmeg-family spices swallowed in large amounts have caused poisoning with hallucinations, rapid heart rate and severe nausea, documented in nutmeg misuse case reports
Part used or form
Dried lacy covering (aril) of the nutmeg seed
How it is used
By mouth
Also called
Mace spice
Traditional / historical use
- Digestive discomfort
- Warming spice in baked goods, sauces and spice blends
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Mace shares its chemistry with nutmeg, but as a food seasoning has no dedicated modern clinical research behind it.
Safety
In ordinary culinary amounts mace is a normal spice. Because it comes from the same seed structure as nutmeg and shares its aromatic compounds, sources describe nutmeg-family spices in large, concentrated amounts as capable of causing toxic effects, including hallucinations, rapid heartbeat and severe nausea — a risk described in reports of nutmeg misuse rather than ordinary cooking.
Avoid or use caution
- Large or concentrated amounts, well beyond ordinary seasoning use
- Any use intended to produce a mind-altering effect
Children
Ordinary seasoning only, in the small amounts typical of home cooking; there is no safe basis for giving a child more than that.
Pregnancy and breastfeeding
Ordinary culinary seasoning is common; concentrated or large amounts are not advised. Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract.
How it was traditionally prepared
The dried aril ground into powder and used in baked goods, sauces and spice blends alongside nutmeg.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Poisoning — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Maitake Mushroom
Grifola frondosa
Limited / mixed evidenceA ruffled, cluster-forming mushroom eaten as food in East Asian and Appalachian cooking traditions, also sold as a concentrated extract.
Herbs & BotanicalsTraditional AsianTraditional European / AmericanSerious safety warningMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Maitake Mushroom
Grifola frondosa
Part used or form
Fresh or dried fruiting body, cooked as food or taken as an extract
How it is used
By mouth
Also called
Hen of the woods · Grifola frondosa · Sheep's head mushroom
Traditional / historical use
- A culinary mushroom in Japanese and Chinese cooking
- A folk tonic for general vitality in East Asian traditional practice
Historical use is not evidence that it works.
What has been studied
- Blood sugar effects in small early studies
- Immune-marker changes in laboratory and small human studies
Current evidence label
Limited / mixed evidence
Maitake extracts have been studied in small trials for blood sugar and immune-marker effects, with mixed and preliminary results. It has also been studied alongside cancer treatment in a few small trials, but this is not evidence that it treats cancer, and it must never replace prescribed oncology care. Some mushrooms and mushroom extracts are marketed with cancer-related claims. No mushroom or mushroom supplement treats, cures or prevents cancer, and none should ever replace or delay a prescribed cancer treatment; anyone with cancer should talk with their oncology team before adding any mushroom supplement.
Safety
As a cooked food, maitake is considered safe for most people. Concentrated extracts can lower blood sugar and, in rare cases, blood pressure, which matters for people on related medicines.
Avoid or use caution
- Diabetes medicines
- Blood pressure medicines
- Bleeding disorders or upcoming surgery
Medicine interactions
- May increase the effect of diabetes medicines, raising the risk of low blood sugar
- May add to the effect of blood pressure medicines
- May increase bleeding risk with blood thinners
Children
Fine as an occasional cooked food; concentrated extracts are not established as safe for children.
Pregnancy and breastfeeding
Cooked as food it is not known to pose special risk, but concentrated extracts have not been studied in pregnancy or breastfeeding and are best avoided.
How it was traditionally prepared
Traditionally sliced and sautéed or simmered in soups; modern supplements use dried powder or a concentrated extract of the fruiting body.
Sources and further reading
- Maitake — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Cancer — complementary approaches — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Metabolic · Immune / general wellness
Mango
Mangifera indica
Some evidenceA tropical fruit rich in vitamin C, vitamin A precursors (carotenoids) and dietary fibre, eaten fresh or ripened.
Foods & Kitchen RemediesTraditional AsianTraditional African / African DiasporaOther Traditional SystemsSerious safety warningGeneral NutritionRead full entryClose entry
Mango
Mangifera indica
Part used or form
Whole ripe fruit flesh
How it is used
By mouth
Also called
Mangoes
Traditional / historical use
- Everyday eating across South Asia, Southeast Asia, Africa and Latin America
- Used green and pickled in some regional cuisines
- Mango leaf and bark used in some traditional systems, distinct from the fruit
Historical use is not evidence that it works.
What has been studied
- Vitamin A precursor and vitamin C intake as part of overall diet
Current evidence label
Some evidence
Ripe mango is a good dietary source of vitamin C and carotenoids that the body can convert toward vitamin A, both recognized nutrients in general nutrition guidance. It is a nutritious whole food; it is not a treatment for any specific disease.
Safety
Safe as food for most people. Mango belongs to the same plant family as poison ivy, and the skin and sap can cause contact skin irritation in sensitive people, though the ripe flesh itself is safe to eat.
Avoid or use caution
- People with a known allergy to poison ivy/urushiol-related plants occasionally react to mango skin or sap
Children
Ripe, peeled mango cut into small pieces is a common and well-tolerated food for young children; the skin is not typically given to young children because of its texture and rare skin-irritation reports.
Pregnancy and breastfeeding
Ordinary food during pregnancy; a good source of vitamin C and carotenoids with no established restriction.
How it was traditionally prepared
Eaten ripe and fresh, blended into drinks, or used green in pickles and chutneys.
Sources and further reading
- Vitamin C — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Immune / general wellness
Related remedies
Marjoram
Origanum majorana
Traditional use — evidence not establishedA mild, sweet herb closely related to oregano, used in Mediterranean cooking and traditional folk remedies for digestion and colds.
Herbs & BotanicalsTraditional European / AmericanOther Traditional SystemsSerious safety warningDigestionCough/ColdRead full entryClose entry
Marjoram
Origanum majorana
Part used or form
Fresh or dried leaf
How it is used
By mouth
Also called
Sweet marjoram
Traditional / historical use
- Digestive discomfort
- Traditional remedy for cold symptoms as a tea
- Seasoning for meats, soups and vegetables
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Marjoram is a well-documented Mediterranean culinary herb with a traditional digestive and cold-remedy reputation, but modern clinical research on it specifically is essentially absent.
Safety
Ordinary amounts used to season food are considered safe for most people. Concentrated essential oil is more irritating and is not meant to be swallowed.
Avoid or use caution
- Concentrated essential oil
- Bleeding disorders with concentrated extract use
Medicine interactions
- May add to the effect of blood-thinning medicines
Children
Fine as an ordinary food seasoning.
Pregnancy and breastfeeding
Ordinary culinary use is common. Concentrated extracts or oils are not advised. Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract.
How it was traditionally prepared
Fresh or dried leaves added near the end of cooking, or steeped as a mild herbal tea.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Respiratory
Related remedies
Marshmallow Leaf
Althaea officinalis
Traditional use — evidence not establishedThe leaf of the same plant whose root is a well-known soothing herb, traditionally used more for cough and irritated airways than the root's digestive and skin uses.
Herbs & BotanicalsTraditional European / AmericanCough/ColdSore ThroatUrinaryRead full entryClose entry
Marshmallow Leaf
Althaea officinalis
Part used or form
Dried leaf
How it is used
By mouth
Also called
Althaea leaf
Traditional / historical use
- Cough and irritated throat
- Mild bladder irritation
- Chest congestion
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
The leaf shares the plant's mucilage content with the root, but it has its own, separate traditional emphasis on the airways, and has not been separately studied in modern trials.
Safety
Traditionally considered gentle when taken as a tea or infusion; as with the root, it may coat and slow absorption of other things swallowed around the same time.
Avoid or use caution
- Taking at the same time as other oral medicines, out of caution about slowed absorption
Medicine interactions
- May slow absorption of other oral medicines if taken at the same time
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditional food-like tea use is common, but it has not been formally studied in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried leaves have traditionally been steeped as a cold or lukewarm infusion to preserve the mucilage.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Cough — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Respiratory · Urinary
Related remedies
Marshmallow Root
Althaea officinalis
Traditional use — evidence not establishedA mucilage-rich root, historically the original source of marshmallow confections, traditionally used to soothe irritated throats and digestive linings.
Herbs & BotanicalsTraditional European / AmericanSore ThroatCough/ColdDigestionRead full entryClose entry
Marshmallow Root
Althaea officinalis
Part used or form
Dried root
How it is used
By mouth
Also called
Althaea officinalis
Traditional / historical use
- Sore throat and cough
- Digestive irritation
- Skin irritation (topical use)
Historical use is not evidence that it works.
What has been studied
- Cough relief (limited human studies)
- Mouth and throat irritation
Current evidence label
Traditional use — evidence not established
Marshmallow root's soothing mucilage is thought to coat irritated tissue, and some small studies support relief of cough and throat irritation, but rigorous, larger human trials are lacking.
Safety
Generally considered safe when taken as a tea or lozenge; it can slow absorption of other medicines taken at the same time because of its coating effect.
Avoid or use caution
- Taking other medicines close in time to marshmallow root
- Diabetes medicines, per limited data
Medicine interactions
- May slow the absorption of other oral medicines if taken at the same time
- May affect blood sugar, per limited data
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried root steeped in cold or warm water to draw out mucilage, made into syrups, lozenges, or historically whipped into the original marshmallow confection.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Sore throat — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Respiratory
Related remedies
Massage Therapy
Some evidenceHands-on soft-tissue work, found in healing traditions everywhere and now common in pain and cancer-care settings.
Mind-Body / Non-Drug PracticesTraditional African / African DiasporaTraditional AsianTraditional European / AmericanSerious safety warningSleepStress/AnxietyPainRead full entryClose entry
Massage Therapy
Part used or form
Hands-on work with muscle and soft tissue
Also called
Bodywork · Swedish massage · Deep tissue massage
Traditional / historical use
- Muscle pain and stiffness
- Relaxation
- Infant care and postpartum care
Historical use is not evidence that it works.
What has been studied
- Low back and neck pain
- Anxiety and stress
- Cancer-related pain and fatigue
- Sleep
Current evidence label
Some evidence
Massage has moderate short-term evidence for easing back and neck pain and for relaxation and anxiety; longer-term effects are less clear.
Safety
Generally safe with a trained therapist. Deep pressure can bruise or cause soreness, and some conditions call for lighter work or none at all.
Avoid or use caution
- Blood clots, bleeding disorders, severe osteoporosis, open wounds, fractures or active infection
- Cancer — use a therapist trained in oncology massage
- Always tell the therapist about your health conditions and medicines
Medicine interactions
- Bruising risk matters with blood thinners — tell the therapist
Children
Infant and child massage are traditional in many cultures; use gentle pressure and a qualified practitioner for any medical need.
Pregnancy and breastfeeding
Prenatal massage is common; use a therapist trained for pregnancy.
How it was traditionally prepared
Oils, warmed hands and traditional stroke patterns appear across African, Asian, European and Indigenous traditions.
Sources and further reading
- Massage therapy — what you need to know — NIH NCCIHU.S. federal health source
Related concerns
Body systems: Nervous system / sleep · Musculoskeletal / pain
Mastic Gum
Pistacia lentiscus
Limited / mixed evidenceA resin tapped from a Mediterranean shrub, chewed and used in Greek, Middle Eastern and North African tradition for digestive complaints and breath freshening.
Herbs & BotanicalsOther Traditional SystemsDigestionRead full entryClose entry
Mastic Gum
Pistacia lentiscus
Part used or form
Dried tree resin
How it is used
By mouth
Also called
Chios mastic · Mastiha
Traditional / historical use
- Stomach discomfort
- Bad breath
- Mouth and gum care
Historical use is not evidence that it works.
What has been studied
- Stomach (peptic) ulcer symptoms
- Helicobacter pylori-related stomach irritation
Current evidence label
Limited / mixed evidence
Small clinical studies suggest mastic gum may ease some upper digestive symptoms and have activity against the ulcer-associated bacterium H. pylori, but trials are limited in size and not conclusive.
Safety
Chewed or taken as a supplement, mastic gum is generally considered well tolerated in the small studies available; allergic reactions are possible in people sensitive to related trees (e.g. pistachio, cashew).
Avoid or use caution
- Known allergy to pistachio, cashew or related tree resins
Medicine interactions
- Limited data on drug interactions
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. It has not been well studied in pregnancy.
How it was traditionally prepared
The hardened resin 'tears' have traditionally been chewed whole or ground into a powder mixed into food or drink.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Indigestion — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Matcha
Camellia sinensis
Limited / mixed evidenceA shade-grown green tea ground into a fine powder and whisked directly into hot water, so the whole leaf is consumed rather than steeped and discarded.
Teas & InfusionsTraditional AsianSerious safety warningGeneral NutritionRead full entryClose entry
Matcha
Camellia sinensis
Part used or form
Shade-grown leaves, stone-ground into a fine powder and whisked into water (whole leaf consumed, not strained)
How it is used
By mouth
Also called
Matcha green tea powder
Traditional / historical use
- Central to Japanese tea ceremony
- Alertness and focus
Historical use is not evidence that it works.
What has been studied
- Antioxidant intake
- Attention and alertness (preliminary)
Current evidence label
Limited / mixed evidence
Because the whole leaf is consumed, matcha delivers more of the tea plant's polyphenols and caffeine per cup than steeped green tea, but clinical research specific to matcha (as opposed to green tea extract generally) is still limited.
Safety
Safe as an everyday beverage for most healthy adults. Because the whole leaf is drunk, a cup can carry more caffeine than a typical steeped green tea, which matters for caffeine-sensitive people.
Avoid or use caution
- Caffeine sensitivity
- Pregnancy (watch total caffeine)
- Liver conditions (very concentrated green tea extracts have been linked to liver injury, though matcha as a brewed beverage is a much lower dose)
Medicine interactions
- Caffeine can add to the effect of stimulant medicines
- May affect iron absorption if taken with meals
Children
Herbal and specialty teas are not advised as a home remedy for infants and young children. Ask the child's doctor first, and keep any caffeine-containing tea away from young children.
Pregnancy and breastfeeding
Higher caffeine-per-cup than steeped tea; keep total caffeine modest and check with a provider. Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Shade-grown leaves have traditionally been steamed, dried, de-stemmed and stone-ground into a fine powder, then whisked into hot water as a ceremonial drink.
Sources and further reading
- Green tea — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Caffeine — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Immune / general wellness
Related remedies
Medical-Grade Honey Wound Dressing
Some evidenceA sterile, specially processed honey product used inside modern wound-care dressings by clinicians for certain wounds — a very different thing from putting kitchen honey on a cut at home.
Topical / SkinTraditional African / African DiasporaTraditional European / AmericanOther Traditional SystemsHigh caution — do not self-treatSkinRead full entryClose entry
Medical-Grade Honey Wound Dressing
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Non-sterile kitchen honey applied to open wounds is not recommended and can introduce infection — the studied product is a sterile medical-grade dressing used by clinicians, not a home substitute
Part used or form
Sterile, irradiated medical-grade honey dressing applied by a clinician
How it is used
On the skin
Also called
Medical honey dressing · Manuka honey dressing
Traditional / historical use
- Historical use of raw honey on wounds in many cultures, long before modern wound care existed
Historical use is not evidence that it works.
What has been studied
- Certain burns and chronic wounds under clinical care
Current evidence label
Some evidence
Sterile, medical-grade honey dressings — irradiated and manufactured to a medical standard — have been studied for some burns and chronic wounds under professional care, with some encouraging results. This is not the same product or process as spreading kitchen honey on a wound at home.
Safety
This entry is about a sterile clinical product applied and monitored by health professionals, not a home remedy. Ordinary kitchen honey is not sterile and is not an appropriate treatment for a wound at home.
Avoid or use caution
- Do not use ordinary kitchen honey on an open wound — it is not sterile and can introduce contamination
- Any wound beyond a very minor scrape needs assessment by a clinician
- Known allergy to bee products
Medicine interactions
- None documented for the clinical product itself
Children
Wound care for children beyond a minor scrape should be handled by a clinician; medical-grade honey dressings are applied by professionals, not improvised at home.
Pregnancy and breastfeeding
No specific pregnancy concern for the clinical product; not relevant to home use.
How it was traditionally prepared
Historically, raw honey was applied directly to wounds in many traditions; modern medical-grade versions are sterilized, standardized and manufactured specifically for clinical wound care.
Sources and further reading
- Wounds and injuries — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Burns — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Related remedies
Meditation and Mindfulness
Some evidenceTraining attention on the breath, the body or the present moment — a practice with deep roots in Buddhist, Hindu, Christian and Muslim contemplative traditions.
Mind-Body / Non-Drug PracticesTraditional AsianOther Traditional SystemsSleepStress/AnxietyPainHeart/CirculationRead full entryClose entry
Meditation and Mindfulness
Part used or form
Seated or guided attention practice, usually a few minutes at a time
Also called
Mindfulness · Sitting meditation · MBSR · Silent prayer practice
Traditional / historical use
- Spiritual practice
- Calm and focus
- Grief and hardship
Historical use is not evidence that it works.
What has been studied
- Stress and anxiety
- Depression
- Blood pressure
- Chronic pain
- Sleep
Current evidence label
Some evidence
Mindfulness-based programs have reasonable evidence for reducing stress, anxiety and some pain and depression symptoms, with effects that are real but usually moderate.
Safety
Considered safe for most people. A minority of people report unpleasant experiences, and meditation is not a replacement for mental-health treatment.
Avoid or use caution
- Serious mental-health conditions — talk to a clinician about which practices suit you
- Do not stop prescribed mental-health treatment to meditate instead
Children
Short, simple breathing and attention practices are widely used with young people and are generally considered safe.
Pregnancy and breastfeeding
Generally considered safe.
How it was traditionally prepared
Practised in monasteries, mosques, temples and churches for centuries; secular programs are modern adaptations.
Sources and further reading
- Meditation and mindfulness — what the science says — NIH NCCIHU.S. federal health source
- Relaxation techniques — what you need to know — NIH NCCIHU.S. federal health source
Related concerns
Body systems: Nervous system / sleep · Musculoskeletal / pain · Cardiovascular
Menthol Rubs
Limited / mixed evidenceA cooling, strong-smelling ointment rubbed on the chest or back to make breathing feel easier during a cold — it doesn't clear congestion, but many people find the sensation comforting.
Oils & AromaticsTraditional European / AmericanTraditional AsianOther Traditional SystemsHigh caution — do not self-treatCough/ColdRead full entryClose entry
Menthol Rubs
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Camphor is toxic if swallowed and has caused seizures and poisoning in young children
Part used or form
Menthol/camphor ointment rubbed on the chest, throat or back
How it is used
On the skin
Also called
Vapor rub · Chest rub · Camphor-menthol ointment
Traditional / historical use
- Cold and cough comfort
- Congestion comfort
Historical use is not evidence that it works.
What has been studied
- Perceived ease of breathing and cough comfort in colds (not actual congestion relief)
Current evidence label
Limited / mixed evidence
Studies suggest menthol/camphor rubs make people feel like they are breathing more easily and may improve sleep during a cold, even though they do not actually open the airway or reduce mucus.
Safety
For skin use only, on the chest, throat and back — never in or near the nose or mouth, and never swallowed. Camphor is toxic if ingested, especially by young children.
Avoid or use caution
- Never apply inside the nostrils or under the nose of an infant or toddler
- Never swallow — camphor poisoning in children is a real, documented danger
- Broken or irritated skin
- Children under 2 — many products explicitly warn against use in this age group
Medicine interactions
- None well documented for topical use
Children
Do not use menthol/camphor rubs on or near the face of infants and toddlers, and keep the container out of children's reach — camphor poisoning is a genuine emergency risk.
Pregnancy and breastfeeding
Occasional topical use on the chest is commonly tolerated by adults; ask a clinician about frequent use in pregnancy.
How it was traditionally prepared
Camphor, menthol and eucalyptus oil blended into a petroleum or wax base, rubbed on the chest and throat at bedtime.
Sources and further reading
- How to treat the common cold at home — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Respiratory · Skin
Related remedies
Milk and Fortified Dairy
Some evidenceCow's milk and dairy products, widely fortified with vitamin D in the U.S., discussed in nutrition guidance as a source of calcium, protein and, when fortified, vitamin D.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsTraditional AsianSerious safety warningGeneral NutritionRead full entryClose entry
Milk and Fortified Dairy
Part used or form
Liquid dairy milk and products such as fortified milk, cheese and yogurt
How it is used
By mouth
Also called
Cow's milk · Fortified milk
Traditional / historical use
- A dietary staple across many cultures, in liquid, fermented and aged forms
Historical use is not evidence that it works.
What has been studied
- Calcium and vitamin D intake and bone health
- Growth and nutrition in childhood
Current evidence label
Some evidence
Milk and fortified dairy are well-documented dietary sources of calcium, protein and, in fortified products, vitamin D, all recognized in nutrition guidance as important for bone health across the lifespan. Dairy is one option among several ways to meet these nutrient needs, not the only one.
Safety
Milk is a common food allergen (cow's milk protein allergy, distinct from lactose intolerance) and lactose intolerance causing digestive discomfort is common in many populations. Whole cow's milk is not recommended as the main drink for infants under 12 months.
Avoid or use caution
- Cow's milk protein allergy — avoid
- Lactose intolerance — smaller amounts, lactose-free products, or fermented dairy such as yogurt may be better tolerated
- Not recommended as a main drink before 12 months of age
Children
Breast milk or infant formula, not cow's milk, should be the main drink through the first year; after that, pediatric guidance can advise on appropriate dairy intake and alternatives for children with a milk allergy.
Pregnancy and breastfeeding
An ordinary source of calcium, protein and vitamin D during pregnancy for people without a milk allergy or intolerance; pasteurized dairy products are recommended and unpasteurized ('raw') milk and soft unpasteurized cheeses are generally advised against in pregnancy because of infection risk.
How it was traditionally prepared
Consumed as liquid milk, or made into cheese, yogurt and other fermented dairy products.
Sources and further reading
- Calcium — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Lactose intolerance — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Osteoporosis — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Food allergy — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Musculoskeletal / pain · Metabolic
Related remedies
Milk Thistle
Silybum marianum
Limited / mixed evidenceA spiny purple-flowered thistle used in European practice for the liver for around two thousand years.
Herbs & BotanicalsTraditional European / AmericanUrinaryMetabolic/Blood SugarRead full entryClose entry
Milk Thistle
Silybum marianum
Part used or form
Seeds (fruit)
Also called
Silymarin · Holy thistle · Mary thistle
Traditional / historical use
- Liver and gallbladder complaints
- Jaundice
- Milk supply beliefs
Historical use is not evidence that it works.
What has been studied
- Hepatitis and cirrhosis
- Liver damage from medicines or toxins
- Diabetes
Current evidence label
Limited / mixed evidence
Despite a long tradition and many studies, milk thistle has not been clearly shown to improve liver disease outcomes; results remain inconsistent.
Safety
Generally well tolerated; loose stools, nausea and bloating are reported. Allergic reactions are possible, especially with daisy-family allergy.
Avoid or use caution
- Daisy family allergy
- Liver disease still needs medical management
- Hormone-sensitive conditions — ask a doctor
Medicine interactions
- May affect medicines processed by the liver
- May affect blood sugar with diabetes medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Seeds were ground and infused or tinctured; young leaves were eaten as a vegetable.
Sources and further reading
- Milk thistle — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Metabolic · Urinary
Millet
Pennisetum glaucum / Eleusine coracana (various species)
Limited / mixed evidenceA group of small-seeded, naturally gluten-free grains that are dietary staples across parts of Africa and Asia, discussed in nutrition guidance as whole-grain options.
Foods & Kitchen RemediesTraditional African / African DiasporaTraditional AsianDigestionGeneral NutritionRead full entryClose entry
Millet
Pennisetum glaucum / Eleusine coracana (various species)
Part used or form
Whole grain, cooked or milled into flour
How it is used
By mouth
Also called
Pearl millet · Finger millet · Bajra · Ragi
Traditional / historical use
- A staple cereal grain across West and East Africa and parts of South Asia
Historical use is not evidence that it works.
What has been studied
- Fiber and mineral intake as part of an overall whole-grain diet
Current evidence label
Limited / mixed evidence
Millets are recognized as nutritious whole grains, but the body of controlled human research on millet specifically (as opposed to whole grains in general) is smaller than for wheat, oats or rice.
Safety
Very low risk as food and naturally gluten-free, which makes it a useful grain option for people avoiding wheat. Millet contains compounds that can interfere with iodine uptake in very large amounts, which mainly matters for people with existing thyroid disease eating it as a very large part of the diet.
Avoid or use caution
- Existing thyroid disease and very high, sustained millet intake — worth discussing with a clinician if millet forms an unusually large share of the diet
Children
A suitable grain alternative for children, including those avoiding gluten; cook until soft.
Pregnancy and breastfeeding
An ordinary, nutritious food during pregnancy as part of a varied diet; no special restriction beyond usual balanced eating.
How it was traditionally prepared
Cooked as a porridge, steamed, or milled into flour for flatbreads.
Sources and further reading
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Celiac disease — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Thyroid diseases — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
Mindfulness-Based Stress Reduction (MBSR)
Some evidenceA structured, secular program adapted from Buddhist mindfulness practice, usually taught in weekly group sessions over about two months with daily home exercises.
Mind-Body / Non-Drug PracticesTraditional AsianTraditional European / AmericanStress/AnxietyPainSleepRead full entryClose entry
Mindfulness-Based Stress Reduction (MBSR)
Part used or form
Structured multi-week group program combining meditation, body awareness and gentle yoga
How it is used
Whole-body practice — typically an eight-week group course with daily home practice
Also called
MBSR · Mindfulness-based cognitive therapy (related program)
Traditional / historical use
No documented traditional use recorded here.
Historical use is not evidence that it works.
What has been studied
- Stress
- Anxiety
- Depression relapse prevention
- Chronic pain
- Sleep
Current evidence label
Some evidence
MBSR and related mindfulness programs have a fairly large evidence base for stress, anxiety and chronic pain, showing moderate benefits on average, though not everyone responds and comparisons with other active treatments are mixed.
Safety
Considered safe for most participants. A minority report increased distress, anxiety or difficult memories surfacing during intensive practice.
Avoid or use caution
- Active psychosis or severe untreated mental illness — discuss with a clinician before joining a course
- Do not use MBSR to replace prescribed mental-health treatment
Children
Youth-adapted mindfulness programs exist and are generally considered safe with age-appropriate instruction.
Pregnancy and breastfeeding
Generally considered safe; gentle movement components can be modified with an instructor.
Historical and cultural background
Rooted in Buddhist mindfulness meditation, adapted into a standardized clinical program rather than a religious practice.
How it was traditionally prepared
Developed by Jon Kabat-Zinn in the late 1970s, drawing on Buddhist meditation adapted for a secular medical setting.
Sources and further reading
- Meditation and mindfulness — what the science says — NIH NCCIHU.S. federal health source
- Mind and body approaches for chronic pain — research review — NIH NCCIHU.S. federal health source
- Depression — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep
Related remedies
Miso
Limited / mixed evidenceA traditional Japanese fermented paste made from soybeans, salt and a fermenting culture, often combined with rice or barley, used to flavor soups and other dishes.
Foods & Kitchen RemediesTraditional AsianDigestionHeart/CirculationGeneral NutritionRead full entryClose entry
Miso
Part used or form
Fermented soybean (and often grain) paste
How it is used
By mouth
Also called
Miso paste
Traditional / historical use
- A staple seasoning and soup base in Japanese cooking for centuries
Historical use is not evidence that it works.
What has been studied
- Fermented soy foods and gut bacteria, studied broadly rather than for miso specifically
Current evidence label
Limited / mixed evidence
Miso is a well-established fermented food, and fermented foods broadly are of interest in nutrition research for their live cultures and effect on gut bacteria, but dedicated clinical evidence for miso specifically is limited compared with general fermented-food and soy research.
Safety
Miso is very high in sodium because salt is essential to its fermentation and preservation; this is its main safety-relevant point for people managing blood pressure or on a sodium-restricted diet. It also contains soy, a common allergen.
Avoid or use caution
- High blood pressure or sodium-restricted diets — miso is a concentrated sodium source used in small amounts
- Soy allergy — avoid
Children
An ordinary seasoning ingredient for children in small, diluted amounts (such as in soup); it is not appropriate as a significant sodium source in a child's diet.
Pregnancy and breastfeeding
An ordinary fermented food during pregnancy when used as a seasoning in normal cooked amounts; general pregnancy nutrition guidance on limiting excess sodium still applies.
How it was traditionally prepared
Made by fermenting soybeans, salt and a mold culture, sometimes with added rice or barley, over weeks to years, then used as a soup base or seasoning paste.
Sources and further reading
- Sodium — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Food allergy — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular
Related remedies
Moringa
Moringa oleifera
Limited / mixed evidenceA fast-growing tree native to South Asia and long cultivated across Africa, whose nutrient-dense leaves are eaten as a staple vegetable and increasingly sold worldwide as a 'superfood' powder.
Herbs & BotanicalsTraditional African / African DiasporaTraditional AsianOther Traditional SystemsSerious safety warningGeneral NutritionMetabolic/Blood SugarRead full entryClose entry
Moringa
Moringa oleifera
Part used or form
Leaf (fresh, dried or powdered); pods and seeds also used as food
How it is used
By mouth
Also called
Moringa oleifera · Drumstick tree · Miracle tree
Traditional / historical use
- Everyday leafy vegetable and nutrition source
- Traditionally used to support lactation
- General tonic use
Historical use is not evidence that it works.
What has been studied
- Blood sugar
- Cholesterol
- Nutritional supplementation in food-insecure regions
Current evidence label
Limited / mixed evidence
Moringa leaves are a genuinely nutrient-rich food, and some small human trials suggest modest effects on blood sugar or cholesterol, but the clinical evidence is still limited and does not support treating any disease with moringa supplements.
Safety
Eating moringa leaves and pods as food is well established across the regions where it grows and is generally considered safe. Root and root bark are more concerning and are not the parts used as food.
Avoid or use caution
- Diabetes or blood pressure medicines, for monitoring
- Root or root bark preparations, which are traditionally considered more toxic and are not used as food
Medicine interactions
- May add to the effect of diabetes or blood pressure medicines
- May affect thyroid medicines, per limited data
Children
Moringa leaf is eaten as a vegetable in many cultures; concentrated supplement powders and capsules are not a children's remedy.
Pregnancy and breastfeeding
Moringa leaf is eaten as a food in many pregnancies, but concentrated root or bark preparations are traditionally avoided in pregnancy. Ask a doctor or midwife before using moringa supplements while pregnant or breastfeeding.
Historical and cultural background
Moringa has been cultivated and eaten as a staple leafy vegetable across parts of Africa and South Asia for generations, valued for growing in dry conditions where other greens struggle. Its long culinary history reflects real nutritional value as a food; it does not by itself prove that supplement products treat any medical condition.
How it was traditionally prepared
Fresh leaves cooked into stews and sauces, dried and ground into powder stirred into food or water, and young pods cooked as a vegetable.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Diabetes — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Metabolic · Immune / general wellness
Related remedies
Motherwort
Leonurus cardiaca
Traditional use — evidence not establishedA bitter mint-family herb long used in European and Chinese herbal tradition for heart palpitations linked to anxiety and for menstrual complaints.
Herbs & BotanicalsTraditional European / AmericanTraditional AsianSerious safety warningHeart/CirculationMenstrual/MenopauseStress/AnxietyRead full entryClose entry
Motherwort
Leonurus cardiaca
Part used or form
Dried aerial parts (leaf and flower)
How it is used
By mouth
Also called
Lion's tail · Leonurus
Traditional / historical use
- Heart palpitations linked to nervousness
- Menstrual cramps
- Mild anxiety or restlessness
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Its name reflects a long traditional link to women's health and heart-related nervousness, but modern human clinical trials are lacking.
Safety
Traditional sources describe motherwort as generally well tolerated in typical tea or tincture use; it can cause stomach upset, and its blood-thinning and uterine-stimulating reputation calls for caution in some situations.
Avoid or use caution
- Bleeding disorders
- Planned surgery
- Taken together with heart-rhythm medicines without medical advice
Medicine interactions
- May add to the effect of blood-thinning medicines
- May add to the effect of sedatives or blood pressure medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy. Traditional sources describe motherwort as a uterine stimulant, so it is avoided before labor. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried leaf and flowering tops have traditionally been steeped as a bitter tea or made into a tincture.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Menstruation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Cardiovascular · Reproductive / menstrual / menopause
Related remedies
Mugwort
Artemisia vulgaris
Traditional use — evidence not establishedA bitter aromatic plant used in European folk practice and, in East Asia, dried and burned on the skin's surface as moxibustion.
Herbs & BotanicalsTraditional AsianTraditional European / AmericanSkinMenstrual/MenopauseRead full entryClose entry
Mugwort
Artemisia vulgaris
Part used or form
Leaf and stem; also burned as moxa
Also called
Artemisia vulgaris · Ai ye · St. John's plant
Traditional / historical use
- Digestive complaints
- Menstrual complaints
- Moxibustion
- Flavouring and ritual use
Historical use is not evidence that it works.
What has been studied
- Moxibustion for breech presentation
- Digestive symptoms
Current evidence label
Traditional use — evidence not established
Human research on mugwort is very limited, so its effects are unproven. Moxibustion has been studied a little, mostly in small trials.
Safety
Can cause allergic reactions, and mugwort pollen is a common hay fever trigger. Cross-reacts with several foods. Burning moxa produces smoke and can burn skin.
Avoid or use caution
- Daisy family, birch or celery allergy
- Asthma — smoke can trigger symptoms
- Skin burns from moxibustion
Medicine interactions
- Little is known; caution with any medicine if allergy-prone
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditionally avoided as a taken herb in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Leaves were dried for teas and bitters in Europe, and compressed into moxa cones and sticks in East Asia.
Sources and further reading
- Mugwort — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Skin · Reproductive / menstrual / menopause
Mullein
Verbascum thapsus
Traditional use — evidence not establishedA tall, soft-leaved biennial plant used for generations in European and American folk medicine as a lung and throat soother, traditionally smoked or brewed as tea.
Herbs & BotanicalsTraditional European / AmericanCough/ColdSore ThroatRead full entryClose entry
Mullein
Verbascum thapsus
Part used or form
Dried leaf and flower
How it is used
By mouth
Also called
Verbascum thapsus · Great mullein
Traditional / historical use
- Cough and chest congestion
- Sore throat
- Traditionally smoked for respiratory complaints
Historical use is not evidence that it works.
What has been studied
- Cough relief (very limited human research)
Current evidence label
Traditional use — evidence not established
Mullein has a long folk reputation for soothing coughs, but there is very little modern clinical research in people to confirm this.
Safety
Mullein tea, strained well to remove the fine leaf hairs that can irritate the throat, is generally considered low risk in typical use. Smoking any plant material carries lung irritation risks regardless of the herb.
Avoid or use caution
- Unstrained tea, due to irritating leaf hairs
- Smoking any herb, due to airway irritation
Medicine interactions
- Limited data; no well-documented major drug interactions
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried leaves and flowers steeped as a well-strained tea; historically also dried and smoked, which this library does not recommend given general risks of inhaling smoke.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Cough — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Respiratory
Related remedies
Mushroom Extracts and Powders (General)
Traditional use — evidence not establishedA fast-growing category of supplements that blend several mushrooms (such as reishi, lion's mane, chaga, cordyceps or turkey tail) into one product, marketed broadly for energy, focus, immunity or general wellness.
Herbs & BotanicalsTraditional AsianTraditional European / AmericanOther Traditional SystemsSerious safety warningGeneral NutritionOtherRead full entryClose entry
Mushroom Extracts and Powders (General)
Part used or form
Manufactured capsules, tinctures or powders, usually blending several mushroom species
How it is used
By mouth
Also called
Medicinal mushroom blends · Mushroom complex supplements · Functional mushroom powders
Traditional / historical use
- Draws on the separate traditional uses of the individual mushrooms it contains
Historical use is not evidence that it works.
What has been studied
- Little independent research exists on blended products as a whole; most studies are on single species or isolated extracts, not the finished blend a person actually buys
Current evidence label
Traditional use — evidence not established
Blended mushroom supplements are rarely studied as finished products; the evidence usually cited comes from research on one isolated species or compound, which may not reflect what is actually in a given bottle. Because these products are sold as dietary supplements in the US, they are not reviewed by the FDA for effectiveness before sale, and potency and species content can vary between brands and even between batches. Some mushrooms and mushroom extracts are marketed with cancer-related claims. No mushroom or mushroom supplement treats, cures or prevents cancer, and none should ever replace or delay a prescribed cancer treatment; anyone with cancer should talk with their oncology team before adding any mushroom supplement.
Safety
Safety depends on which species and how much are actually in the product, which a label cannot always guarantee. Independent testing has occasionally found mushroom supplements with mislabeled species, fillers, or contamination. Wild mushrooms should never be gathered and eaten based on pictures or apps alone: several deadly poisonous species closely resemble edible or medicinal ones, and misidentification poisoning can cause severe liver or kidney injury or death. Store-bought or reliably cultivated mushrooms and supplements from established brands avoid this specific risk.
Avoid or use caution
- Anyone on prescription medicines — check with a pharmacist or doctor before adding a mushroom blend
- People with autoimmune disease or on immune-suppressing medicines
- Anyone considering it in place of a prescribed treatment — it is not a substitute for one
Medicine interactions
- May add to the effect of blood thinners or diabetes medicines depending on which mushrooms are included
- Theoretical interaction with immune-suppressing medicines after transplant
Children
Not established as safe for children; blended supplements are formulated for adults and should not be given to children without a clinician's guidance.
Pregnancy and breastfeeding
Not studied for pregnancy or breastfeeding safety as blended products, so they are best avoided in both.
Rules and regulation
Sold as a dietary supplement in the US, which means it is not reviewed by the FDA for effectiveness, and label claims about specific species or amounts are not independently verified before sale.
How it was traditionally prepared
A modern manufactured category rather than a traditional preparation; forms include capsules, tinctures, coffee-alternative powders and gummies.
Sources and further reading
- Dietary and herbal supplements — what to know — NIH NCCIHU.S. federal health source
- Using dietary supplements wisely — NIH NCCIHU.S. federal health source
- Cancer — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Immune / general wellness
Music Therapy
Limited / mixed evidenceStructured use of music, guided by a trained music therapist, to support emotional, cognitive or physical goals, used in hospitals, hospice and mental-health settings.
Mind-Body / Non-Drug PracticesTraditional European / AmericanOther Traditional SystemsSerious safety warningStress/AnxietyPainRead full entryClose entry
Music Therapy
Part used or form
Listening to or making music with a trained music therapist, individually or in a group
How it is used
Whole-body practice — guided listening or music-making sessions
Also called
Therapeutic music sessions · Clinical music therapy
Traditional / historical use
- Comfort during illness
- Emotional expression
- Community and ceremonial music traditions
Historical use is not evidence that it works.
What has been studied
- Anxiety before procedures
- Pain perception
- Mood in depression
- Quality of life in cancer and dementia care
Current evidence label
Limited / mixed evidence
There is no dedicated NCCIH page on music therapy specifically. Reviews of clinical trials suggest music-based interventions can modestly reduce anxiety and perceived pain around medical procedures and may support mood and quality of life in cancer and dementia care, but study quality and music protocols vary widely, so results are considered promising rather than firmly established.
Safety
Very low risk. Volume that is too loud can affect hearing, and specific pieces or genres can occasionally trigger unwanted memories or distress.
Avoid or use caution
- Keep listening volume moderate to protect hearing
- Trauma linked to specific sounds or music — a trained therapist can help choose material carefully
Children
Music therapy is widely and safely used with children, including in hospital and developmental settings.
Pregnancy and breastfeeding
Generally considered safe; comfortable listening volume is advised.
How it was traditionally prepared
Formal music therapy emerged as a clinical profession in the mid-20th century, building on much older traditions of music used for healing and comfort across cultures.
Sources and further reading
- Anxiety — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Chronic pain — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Depression — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep
Related remedies
Mustard Seed
Brassica nigra / Sinapis alba
Traditional use — evidence not establishedSmall pungent seeds used whole, ground, or made into prepared mustard condiment, with a long traditional history including mustard plasters applied to the skin.
Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianHigh caution — do not self-treatDigestionCough/ColdSkinRead full entryClose entry
Mustard Seed
Brassica nigra / Sinapis alba
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Mustard plasters left on skin have caused chemical burns and blistering, particularly in children
Part used or form
Whole or ground seed
How it is used
By mouth
Also called
Yellow mustard · Brown mustard · Black mustard seed
Traditional / historical use
- Digestive discomfort
- Traditional mustard plaster on the chest for cough and chest congestion
- Condiment and cooking spice
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Mustard is a well-documented traditional remedy, especially the mustard plaster for chest congestion, but there is no modern clinical evidence that it treats a cold or cough.
Safety
Culinary mustard eaten as food or condiment is safe for most people. Mustard plasters and poultices applied directly to skin can cause burns and blistering, especially on children's skin, and are not recommended without medical guidance.
Avoid or use caution
- Direct skin application (plasters/poultices), which can burn skin
- Broken or sensitive skin
Children
Mustard as a condiment or cooking spice is an ordinary food. Mustard plasters on the skin are not recommended for children because of burn risk.
Pregnancy and breastfeeding
Ordinary culinary use is common. Skin plasters are not advised. Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract.
How it was traditionally prepared
Whole seeds ground into powder, mixed with water into a paste for condiment or plaster use, or used whole in pickling and tempering.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Respiratory · Skin
Related remedies
Myrrh
Commiphora myrrha
Traditional use — evidence not establishedAn aromatic resin from a thorny tree native to the Horn of Africa and Arabian Peninsula, used for millennia in incense, embalming and traditional medicine, and still found in mouth rinses today.
Herbs & BotanicalsOther Traditional SystemsTraditional AsianDigestionSkinSore ThroatRead full entryClose entry
Myrrh
Commiphora myrrha
Part used or form
Resin (dried gum from the bark)
How it is used
By mouth
Also called
Commiphora myrrha · Gum myrrh
Traditional / historical use
- Mouth and gum care
- Wound care (topical)
- Digestive complaints
Historical use is not evidence that it works.
What has been studied
- Oral and mouth hygiene (as an ingredient in mouth rinses)
- Wound healing (limited studies)
Current evidence label
Traditional use — evidence not established
Myrrh is a long-standing ingredient in mouth rinses and traditional wound remedies, but rigorous clinical trials isolating myrrh's own effect are limited, so its benefit beyond traditional use is not established.
Safety
Topical and diluted mouth-rinse use is generally considered low risk. Taken by mouth in concentrated amounts, myrrh can cause digestive upset and has caused uterine stimulation in animal studies.
Avoid or use caution
- Concentrated oral use
- Diabetes or blood-thinning medicines
Medicine interactions
- May affect blood sugar medicines, per limited data
- May affect blood-thinning medicines, per limited data
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditionally avoided in pregnancy because concentrated myrrh has been linked to uterine stimulation in animal studies. Ask a doctor or midwife before any use.
How it was traditionally prepared
Resin dissolved into alcohol-based tinctures for mouth rinses, or historically burned as incense and used in embalming.
Sources and further reading
- Myrrh — MSK About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Skin
Related remedies
Nasturtium
Tropaeolum majus
Traditional use — evidence not establishedA peppery-tasting edible flower and leaf used in European folk tradition, sometimes combined with horseradish, as a home remedy for colds and urinary discomfort.
Herbs & BotanicalsTraditional European / AmericanCough/ColdUrinaryGeneral NutritionRead full entryClose entry
Nasturtium
Tropaeolum majus
Part used or form
Fresh leaf and flower
How it is used
By mouth
Also called
Indian cress
Traditional / historical use
- Colds and mild respiratory congestion
- Mild urinary tract discomfort
- Used as a peppery salad green
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Nasturtium's mustard-oil compounds have some antimicrobial activity in laboratory studies, but there is no solid human clinical research supporting its traditional cold or urinary uses.
Safety
The fresh leaves and flowers are widely eaten as a garden salad green and considered a food in ordinary amounts; concentrated extracts are less studied and can irritate the stomach.
Avoid or use caution
- Existing stomach ulcers or sensitive digestion, due to its peppery, irritant mustard-oil compounds
Medicine interactions
- Limited data; caution combining concentrated extracts with stomach-irritating medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ordinary culinary use as a salad green is common, but concentrated extracts have not been studied in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh leaves and flowers have traditionally been eaten raw in salads or infused for a mild tea.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Urinary tract infections — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Respiratory · Urinary
Related remedies
Natto
Limited / mixed evidenceA traditional Japanese food of whole soybeans fermented with a specific bacterium into a sticky, strong-smelling preparation, notable in nutrition discussions for its concentrated vitamin K content.
Foods & Kitchen RemediesTraditional AsianHeart/CirculationGeneral NutritionRead full entryClose entry
Natto
Part used or form
Whole soybeans fermented with Bacillus subtilis, eaten as a sticky, stringy preparation
How it is used
By mouth
Also called
Fermented soybeans
Traditional / historical use
- A traditional breakfast food in parts of Japan for centuries
Historical use is not evidence that it works.
What has been studied
- Vitamin K intake, since natto is one of the most concentrated dietary sources of a specific vitamin K form (menaquinone-7)
Current evidence label
Limited / mixed evidence
Natto is a well-documented, unusually concentrated dietary source of vitamin K (menaquinone), and its fermentation also produces the enzyme nattokinase, which has been studied in early laboratory and small human research for blood-clotting effects; this research has not established natto or nattokinase supplements as a treatment for any cardiovascular condition.
Safety
Natto's high, concentrated vitamin K content is its main safety-relevant point: it can meaningfully affect blood clotting and specifically interferes with how the blood thinner warfarin works, so people on warfarin are usually told to keep vitamin K intake, including from natto, consistent rather than eating large or irregular amounts. Contains soy, a common allergen.
Avoid or use caution
- People taking warfarin — keep intake consistent and discuss with the prescribing clinician rather than starting or stopping suddenly
- Soy allergy — avoid
Medicine interactions
- Warfarin and other vitamin K–dependent blood thinners — natto's concentrated vitamin K content can reduce warfarin's effect; sudden changes in intake should be discussed with the prescribing clinician
Children
An ordinary fermented soy food for children without a soy allergy; its strong texture and smell mean many children simply do not take to it, which is not a safety issue.
Pregnancy and breastfeeding
An ordinary fermented soy food during pregnancy for most people; anyone on a blood thinner or with a clotting disorder should discuss vitamin K–rich foods, including natto, with their care team.
How it was traditionally prepared
Made by fermenting whole soybeans with Bacillus subtilis bacteria, then eaten as-is, often mixed with rice, mustard or soy sauce.
Sources and further reading
- Vitamin K — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Food allergy — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Neem
Azadirachta indica
Limited / mixed evidenceA tree widely used in Ayurvedic tradition and across South Asia, valued for its bitter leaves and oil applied to skin or taken as extracts.
Herbs & BotanicalsTraditional AsianHigh caution — do not self-treatSkinOtherRead full entryClose entry
Neem
Azadirachta indica
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Neem oil swallowed by young children has caused poisoning, including seizures
Part used or form
Leaf, bark, seed oil
How it is used
By mouth and on the skin
Also called
Nimtree · Indian lilac · Margosa
Traditional / historical use
- Skin conditions and wounds
- Dental care (chewing sticks)
- Fevers
- Traditional pest and insect deterrent
Historical use is not evidence that it works.
What has been studied
- Skin conditions such as acne and lice
- Dental plaque and gum health
- Blood sugar in small studies
- Antimicrobial effects in lab studies
Current evidence label
Limited / mixed evidence
Neem has antimicrobial activity in laboratory studies and some small human studies suggest benefit for dental plaque and certain skin conditions, but the overall body of clinical research is small and not conclusive.
Safety
Neem oil taken by mouth, especially by young children, has caused serious poisoning including vomiting, drowsiness and seizures. Topical and dental use in adults is better tolerated.
Avoid or use caution
- Never give neem oil by mouth to infants or children
- Diabetes medicines
- Autoimmune conditions (may stimulate the immune system)
Medicine interactions
- May lower blood sugar, which matters with diabetes medicines
- May affect fertility based on animal studies
Children
Neem oil must never be given by mouth to infants or young children; it has caused serious poisoning.
Pregnancy and breastfeeding
Neem is traditionally avoided in pregnancy and has shown effects on fertility in animal studies. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Leaves were traditionally chewed, boiled into a bitter decoction, or crushed into a paste for the skin; twigs were used as chewing sticks for dental hygiene; seed oil was pressed for topical use.
Sources and further reading
- Neem — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Skin · Immune / general wellness
Related remedies
Nettle Tea
Urtica dioica
Traditional use — evidence not establishedA brewed infusion made from dried stinging nettle leaf; cooking or drying removes the sting, unlike the fresh raw plant.
Teas & InfusionsTraditional European / AmericanUrinaryHeart/CirculationRead full entryClose entry
Nettle Tea
Urtica dioica
Part used or form
Dried leaf steeped as a hot-water infusion
How it is used
By mouth
Also called
Stinging nettle infusion
Traditional / historical use
- General 'spring tonic' use
- Seasonal nasal discomfort
- Mild fluid retention
Historical use is not evidence that it works.
What has been studied
- Seasonal allergy symptoms (mixed results)
Current evidence label
Traditional use — evidence not established
Nettle leaf has been studied mostly as a capsule or freeze-dried extract for seasonal nasal symptoms with mixed results; the brewed tea itself has little direct research of its own.
Safety
Brewed nettle leaf tea is widely used as a beverage and generally considered low risk for most adults. Fresh raw leaf stings on contact, but drying or cooking neutralizes this.
Avoid or use caution
- Low blood pressure
- Kidney conditions
- People on diuretics or blood pressure medicine
Medicine interactions
- May add to the effect of blood pressure medicines or diuretics
- May affect blood sugar or blood-thinning medicines
Children
Herbal and specialty teas are not advised as a home remedy for infants and young children. Ask the child's doctor first, and keep any caffeine-containing tea away from young children.
Pregnancy and breastfeeding
Nettle leaf tea is sometimes used traditionally in pregnancy, but it can act like a mild diuretic and uterine stimulant in concentrated form, so professional guidance is advised. Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried leaves have traditionally been steeped in hot water, strained, and drunk as an everyday infusion.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- High blood pressure — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Respiratory · Cardiovascular · Urinary
Related remedies
Noni
Morinda citrifolia
Traditional use — evidence not establishedA strong-smelling Pacific Island fruit long used in Polynesian practice and now sold widely as juice.
Herbs & BotanicalsOther Traditional SystemsSerious safety warningDigestionPainInflammationSkinRead full entryClose entry
Noni
Morinda citrifolia
Part used or form
Fruit, juice, leaf and root
Also called
Indian mulberry · Morinda · Cheese fruit
Traditional / historical use
- Skin complaints and wounds
- Joint pain
- Digestion
- General wellness
Historical use is not evidence that it works.
What has been studied
- Cancer-related fatigue
- Arthritis
- General wellbeing
Current evidence label
Traditional use — evidence not established
There is not enough reliable human research to show that noni helps any health condition, despite broad marketing claims.
Safety
Cases of liver injury have been reported in people drinking noni juice. Noni is also high in potassium.
Avoid or use caution
- Kidney disease or potassium restriction
- Liver disease
Medicine interactions
- High potassium content matters with potassium-sparing diuretics, ACE inhibitors and ARBs
- May add to liver strain from other products
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Ripe fruit was fermented into juice, and leaves were warmed and applied to the skin in Polynesian practice.
Sources and further reading
- Noni — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Skin · Musculoskeletal / pain
Nopal (Prickly Pear Cactus)
Opuntia ficus-indica
Limited / mixed evidenceThe flattened pads of the prickly pear cactus, a traditional Mexican food and folk remedy for blood sugar and cholesterol, now also studied in small clinical trials.
Foods & Kitchen RemediesOther Traditional SystemsTraditional European / AmericanMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Nopal (Prickly Pear Cactus)
Opuntia ficus-indica
Part used or form
Fresh or cooked cactus pad (nopal)
How it is used
By mouth
Also called
Nopales · Opuntia
Traditional / historical use
- Blood sugar support
- Cholesterol support
- General digestive tonic
- Hangover discomfort
Historical use is not evidence that it works.
What has been studied
- Blood sugar levels after meals
- Cholesterol levels
Current evidence label
Limited / mixed evidence
Some clinical studies, mostly small, suggest cooked nopal eaten with meals may modestly lower after-meal blood sugar in people with diabetes, but results vary and it is not a substitute for prescribed diabetes care.
Safety
As a traditional food, nopal is widely eaten and well tolerated; it may lower blood sugar, which matters for people already taking diabetes medicine.
Avoid or use caution
- Diabetes medicines, unless blood sugar is monitored with a doctor's guidance
Medicine interactions
- May add to the effect of diabetes medicines, raising the risk of blood sugar dropping too low
Children
Nopal is eaten as an ordinary food in many households; treating it as a medicinal supplement for a child should be discussed with the child's doctor first.
Pregnancy and breastfeeding
Nopal is commonly eaten as a food during pregnancy; using it specifically to manage blood sugar or cholesterol should be discussed with a prenatal care provider.
How it was traditionally prepared
Fresh pads have traditionally had their spines removed and been grilled, boiled or diced into stews and salads.
Sources and further reading
- Diabetes — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Cholesterol — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
Nutmeg
Myristica fragrans
Safety concernA warm, sweet spice grated or ground from the seed of a Southeast Asian tree, widely used in baking and traditional remedies for digestion and sleep, but documented as toxic when misused in large amounts.
Herbs & BotanicalsTraditional AsianTraditional European / AmericanHigh caution — do not self-treatDigestionSleepRead full entryClose entry
Nutmeg
Myristica fragrans
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Nutmeg swallowed in large amounts has caused poisoning with hallucinations, rapid heart rate, severe nausea and vomiting, documented in case reports and poison-control data
Part used or form
Dried seed, whole or ground
How it is used
By mouth
Also called
Whole nutmeg · Ground nutmeg
Traditional / historical use
- Digestive discomfort
- Traditional folk remedy for sleeplessness in small culinary amounts
- Flavoring for baked goods, drinks and sauces
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Safety concern
Nutmeg is a long-standing culinary and folk-remedy spice, but modern sources document it as a substance of misuse: swallowing large, non-culinary amounts has caused poisoning, and there is no clinical evidence supporting it as an effective treatment for anything.
Safety
Ordinary culinary amounts, such as a light grating on a dish or in baking, are considered a normal food use. Poison control and medical sources describe nutmeg poisoning — including hallucinations, rapid heart rate, severe nausea, vomiting and, rarely, more serious effects — following intentional consumption of large amounts. Nutmeg should never be used in an attempt to produce an intoxicating or mind-altering effect.
Avoid or use caution
- Any amount well beyond ordinary seasoning use
- Use intended to cause intoxication or altered mental state
Children
Only ordinary small culinary amounts belong anywhere near a child's food; nutmeg has no established medical use for children and should never be given as a remedy or sleep aid.
Pregnancy and breastfeeding
Ordinary light culinary use is generally considered acceptable; concentrated or large amounts are not advised in pregnancy. Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract.
How it was traditionally prepared
Whole seeds grated fresh or purchased pre-ground, and used sparingly to flavor baked goods, eggnog, sauces and vegetables.
Sources and further reading
- Poisoning — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Nervous system / sleep
Related remedies
Oat Bran
Avena sativa
Some evidenceThe fiber-rich outer layer of the oat grain, singled out in cholesterol guidance for its concentrated soluble fiber compared with whole oats.
Foods & Kitchen RemediesTraditional European / AmericanDigestionHeart/CirculationMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Oat Bran
Avena sativa
Part used or form
The outer bran layer of the oat grain, milled and cooked as cereal or added to baking
How it is used
By mouth
Also called
Oat bran cereal
Traditional / historical use
- A breakfast cereal and baking ingredient
Historical use is not evidence that it works.
What has been studied
- Blood cholesterol, specifically LDL ('bad') cholesterol, as part of an overall diet
- Digestive regularity
Current evidence label
Some evidence
Oat bran is concentrated in beta-glucan soluble fiber, and MedlinePlus cholesterol-diet guidance lists oat products among foods that can help lower LDL cholesterol modestly when eaten regularly as part of an overall lower-fat, higher-fiber diet. It works alongside — not instead of — other cholesterol management.
Safety
Very low risk as food. Increasing fiber quickly without enough fluid can cause bloating, gas or, rarely, constipation.
Avoid or use caution
- Increase fiber gradually with adequate fluid intake
- Contains gluten — not suitable for celiac disease or wheat/gluten allergy unless labeled gluten-free and processed to avoid cross-contact
Medicine interactions
- Very high fiber intake taken close to some oral medicines may reduce how much medicine is absorbed; spacing intake apart is a reasonable precaution
Children
A suitable breakfast food for children as part of a balanced diet; cooked, soft cereal texture avoids choking concerns.
Pregnancy and breastfeeding
An ordinary, nutritious food during pregnancy; no special restriction described in general nutrition guidance.
How it was traditionally prepared
Milled from the oat grain's bran layer and cooked as a hot cereal, or added to baked goods and smoothies.
Sources and further reading
- How to lower cholesterol with diet — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Celiac disease — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular · Metabolic
Related remedies
Oat Straw
Avena sativa
Limited / mixed evidenceThe green, unripe aerial parts of the oat plant, traditionally brewed as a calming 'nervine' tea — a different part and use from the ripe oat grain eaten as breakfast oats.
Herbs & BotanicalsTraditional European / AmericanStress/AnxietySleepRead full entryClose entry
Oat Straw
Avena sativa
Part used or form
Dried aerial parts (stem and unripe seed head), distinct from the ripe oat grain used as food
How it is used
By mouth
Also called
Avena sativa herb · Green oats
Traditional / historical use
- Mild nervous tension or stress
- General nerve tonic
- Mild sleep support
Historical use is not evidence that it works.
What has been studied
- Mood and cognitive measures in a few small trials
Current evidence label
Limited / mixed evidence
A small number of studies using green oat extracts have looked at mood, stress and mental performance, with modest and mixed results; the aerial-parts tea itself has not been separately studied to the same degree.
Safety
As a traditional tea, oat straw is generally considered well tolerated; people with celiac disease or gluten sensitivity should be aware oats are often grown near or processed with wheat unless labeled gluten-free.
Avoid or use caution
- Celiac disease or gluten sensitivity, unless the product is certified gluten-free
Medicine interactions
- Limited data on drug interactions
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditional food-like tea use is common, but concentrated extracts have not been well studied in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
The green, unripe stems and seed heads have traditionally been dried and steeped as an infusion.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Stress — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep
Related remedies
Oatmeal Bath
Avena sativa
Limited / mixed evidenceFinely ground oats stirred into a lukewarm bath — a long-standing home measure for itchy, irritated skin.
Topical / SkinTraditional European / AmericanSkinRead full entryClose entry
Oatmeal Bath
Avena sativa
Part used or form
Finely ground oats in lukewarm bath water
Also called
Colloidal oatmeal · Oat bath · Avena bath
Traditional / historical use
- Itchy skin
- Eczema flares
- Chickenpox and rashes
- Sunburn discomfort
Historical use is not evidence that it works.
What has been studied
- Itch and skin barrier in eczema and dermatitis
Current evidence label
Limited / mixed evidence
Lukewarm baths and moisturising are standard eczema self-care, and colloidal oatmeal products are commonly recommended for itch, though the specific evidence is modest.
Safety
Low risk. Bath surfaces become slippery, hot water makes itching worse, and oat allergy is possible.
Avoid or use caution
- Use lukewarm, not hot, water
- Baths become slippery — hold on and supervise children
- Broken, weeping or infected skin needs a doctor
- Oat allergy
Children
Commonly used for itchy children. Never leave a child alone in a bath, and ask the child's doctor about eczema care.
Pregnancy and breastfeeding
Low risk; avoid hot baths.
How it was traditionally prepared
Oats were tied in cloth and squeezed into the bath, or ground fine and stirred straight in.
Sources and further reading
- Eczema — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Related concerns
Body systems: Skin
Oats
Avena sativa
Stronger evidenceOne of the best-established whole-grain foods for cholesterol, thanks to its soluble beta-glucan fiber, and a breakfast staple across many cultures.
Foods & Kitchen RemediesTraditional European / AmericanDigestionHeart/CirculationMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Oats
Avena sativa
Part used or form
Whole grain — rolled, steel-cut, or ground into flour, cooked as porridge or baked
How it is used
By mouth
Also called
Oatmeal · Rolled oats · Steel-cut oats
Traditional / historical use
- A staple breakfast and baking grain, especially in northern European food traditions
- A traditional soothing skin bath, made separately as colloidal oatmeal
Historical use is not evidence that it works.
What has been studied
- Blood cholesterol
- Blood sugar response after meals
- Regularity
Current evidence label
Stronger evidence
Oat beta-glucan fiber is one of the more consistently supported whole foods for modestly lowering LDL cholesterol when eaten regularly as part of the diet, and MedlinePlus lists oats among fiber-rich foods recommended for heart and digestive health.
Safety
Very low risk as food. Plain oats do not contain gluten, but they are frequently cross-contaminated with wheat during growing or processing, so people with celiac disease should look for oats labeled gluten-free.
Avoid or use caution
- Celiac disease — choose oats certified gluten-free due to cross-contamination risk
- Increase fiber gradually with enough fluids
Children
Ordinary breakfast food for children.
Pregnancy and breastfeeding
Ordinary whole-grain food.
How it was traditionally prepared
Rolled or steel-cut and cooked into porridge, baked into breads and cookies, or ground into flour.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- How to lower cholesterol with diet — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Cholesterol — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular · Metabolic
Related remedies
Olive Leaf
Olea europaea
Limited / mixed evidenceThe leaf of the olive tree, used in Mediterranean folk tradition as a tonic and now sold as extract capsules and teas, separate from the well-known culinary olive oil.
Herbs & BotanicalsTraditional European / AmericanHeart/CirculationMetabolic/Blood SugarRead full entryClose entry
Olive Leaf
Olea europaea
Part used or form
Dried leaf, taken as tea or extract
How it is used
By mouth
Also called
Olea europaea leaf
Traditional / historical use
- Fevers
- General tonic for vitality
- Traditional remedy for high blood pressure
Historical use is not evidence that it works.
What has been studied
- Blood pressure
- Blood sugar
- Cholesterol
- Antioxidant effects
Current evidence label
Limited / mixed evidence
Small human studies suggest olive leaf extract may modestly lower blood pressure and blood sugar, but the trials are limited in size and quality, so this is not established treatment.
Safety
Olive leaf appears to be well tolerated in the small studies available, with mild digestive upset reported occasionally.
Avoid or use caution
- Low blood pressure
- Taking blood pressure or blood sugar medicines
Medicine interactions
- May add to the effect of blood pressure medicines
- May add to the effect of diabetes medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Leaves were traditionally dried and steeped as a bitter tea or simmered into a decoction.
Sources and further reading
- Olive Leaf — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- High blood pressure — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Metabolic
Related remedies
Onion (Traditional Remedy Use)
Allium cepa
Limited / mixed evidenceBeyond its everyday use as a food, raw onion has a long folk-medicine history — steeped into syrups for cough and applied to the skin for insect bites and minor irritation, kept here separate from ordinary cooking use.
Herbs & BotanicalsTraditional European / AmericanOther Traditional SystemsTraditional African / African DiasporaSerious safety warningCough/ColdSkinHeart/CirculationRead full entryClose entry
Onion (Traditional Remedy Use)
Allium cepa
Part used or form
Fresh bulb, used both as syrup/poultice and eaten as food
How it is used
By mouth
Also called
Allium cepa
Traditional / historical use
- Cough and cold syrup (onion steeped with sugar or honey)
- Applied to insect bites or minor skin irritation
- Traditional 'blood purifier' or general tonic use
Historical use is not evidence that it works.
What has been studied
- Onion compounds (quercetin, sulfur compounds) and cardiovascular/antioxidant markers in laboratory and small human studies
Current evidence label
Limited / mixed evidence
Onion contains compounds studied for antioxidant and cardiovascular effects, but the folk practice of onion cough syrup or skin poultices has not itself been tested in clinical trials.
Safety
Onion is safe as a food for almost everyone; raw onion juice applied to broken or irritated skin can cause burning or irritation, and folk poultice use should stop if the skin reacts.
Avoid or use caution
- Applying raw onion to broken skin or a child's skin
- Bleeding disorders, for concentrated extract use
Medicine interactions
- May add to the effect of blood-thinning medicines in large medicinal amounts
Children
Onion is a common food, but folk remedies like onion syrup or poultices for a child's cough or skin should be discussed with the child's doctor first, especially for infants.
Pregnancy and breastfeeding
Onion is a common food safely eaten during pregnancy; there is no dedicated safety research on concentrated onion remedies in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Sliced raw onion has traditionally been layered with sugar or honey and left to steep into a syrup, or crushed into a poultice applied to the skin.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Cough — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Respiratory · Skin · Cardiovascular
Related remedies
Oolong Tea
Camellia sinensis
Limited / mixed evidenceA partially oxidized tea from the same plant as green and black tea, sitting chemically and in flavor between the two.
Teas & InfusionsTraditional AsianMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Oolong Tea
Camellia sinensis
Part used or form
Leaves, partially oxidized between green and black tea
How it is used
By mouth
Also called
Wu long tea
Traditional / historical use
- General refreshment
- Digestive comfort after meals
Historical use is not evidence that it works.
What has been studied
- Metabolic and weight-related outcomes (preliminary)
Current evidence label
Limited / mixed evidence
A handful of small studies have looked at oolong tea and markers of metabolism or weight, with mixed and inconclusive results; it has not been shown to be a treatment for any condition.
Safety
Safe as an everyday beverage for most healthy adults. Contains caffeine, and strong brews on an empty stomach can cause jitteriness or stomach upset in sensitive people.
Avoid or use caution
- Caffeine sensitivity
- Anxiety disorders
- Sleep problems
- Iron-deficiency anemia (tea can reduce iron absorption)
Medicine interactions
- Caffeine can interact with stimulant medicines and add to overall caffeine intake
Children
Herbal and specialty teas are not advised as a home remedy for infants and young children. Ask the child's doctor first, and keep any caffeine-containing tea away from young children.
Pregnancy and breastfeeding
Caffeine-containing; keep total caffeine intake modest in pregnancy. Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Leaves have traditionally been withered, bruised, partially oxidized, then fired and steeped as a hot infusion.
Sources and further reading
- Green tea — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Caffeine — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Metabolic · Immune / general wellness
Related remedies
Oranges
Citrus sinensis (and related Citrus spp.)
Some evidenceOne of the most common citrus fruits and a major dietary source of vitamin C, folate and potassium.
Foods & Kitchen RemediesTraditional AsianTraditional European / AmericanGeneral NutritionCough/ColdRead full entryClose entry
Oranges
Citrus sinensis (and related Citrus spp.)
Part used or form
Whole fruit or juice
How it is used
By mouth
Also called
Orange · Mandarin · Clementine · Tangerine
Traditional / historical use
- Everyday eating
- A gift and symbol of good fortune in some Asian traditions
- A traditional food believed to ward off colds
Historical use is not evidence that it works.
What has been studied
- Vitamin C and folate intake as part of overall diet
Current evidence label
Some evidence
Oranges are a reliable food source of vitamin C, folate and potassium and fit comfortably into general healthy-eating guidance. They are not a proven cold treatment; any modest immune benefit tracks with overall vitamin C adequacy rather than with oranges specifically.
Safety
Safe as food for almost everyone. Whole segments can be a choking risk for young children, and the acid in juice can affect tooth enamel and reflux.
Avoid or use caution
- Acid reflux may be worsened by orange juice in some people
- Citrus allergy, which is uncommon
Children
Peeled segments with seeds removed and cut small are appropriate for young children; whole segments or large pieces of peel are a choking hazard.
Pregnancy and breastfeeding
Ordinary food during pregnancy; a normal source of folate and vitamin C with no special restriction.
How it was traditionally prepared
Eaten fresh, peeled, juiced, or candied as peel.
Sources and further reading
- Vitamin C — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Immune / general wellness
Related remedies
Oregano
Origanum vulgare
Traditional use — evidence not establishedA Mediterranean culinary herb whose leaf and concentrated essential oil have also been used as a folk remedy for coughs and minor infections.
Herbs & BotanicalsTraditional European / AmericanCough/ColdDigestionRead full entryClose entry
Oregano
Origanum vulgare
Part used or form
Dried leaf and essential oil
How it is used
By mouth and on the skin
Also called
Wild marjoram · Origanum
Traditional / historical use
- Coughs and colds
- Digestive complaints
- Minor skin irritation
Historical use is not evidence that it works.
What has been studied
- Antimicrobial activity of oregano oil in laboratory studies
- Effects on gut microbes
Current evidence label
Traditional use — evidence not established
Oregano oil shows antimicrobial activity against some organisms in laboratory dishes, but this has not translated into confirmed benefit in human clinical trials. Culinary use as a seasoning is a separate matter from concentrated oil supplements.
Safety
Oregano as a culinary seasoning is safe for most people. Concentrated essential oil is much stronger, can irritate skin and the digestive tract, and is not meant to be swallowed undiluted.
Avoid or use caution
- Undiluted essential oil on skin
- Swallowing essential oil
- People on blood thinners
Medicine interactions
- May add to the effect of blood-thinning medicines
- May affect blood sugar
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Culinary amounts in food are considered normal; medicinal amounts and essential oil are generally advised against. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh or dried leaves were used in cooking and steeped as tea; the essential oil was distilled separately and diluted before any topical use.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Osteopathic Manipulative Treatment
Limited / mixed evidenceA hands-on approach used by osteopathic physicians (DOs) that includes stretching, gentle pressure and joint mobilization, used alongside conventional medical care rather than in place of it.
Mind-Body / Non-Drug PracticesTraditional European / AmericanPainRead full entryClose entry
Osteopathic Manipulative Treatment
Part used or form
Hands-on stretching, gentle pressure and joint mobilization performed by a licensed osteopathic physician
How it is used
On the body — hands-on manual therapy
Also called
OMT · Osteopathic manipulation
Traditional / historical use
- Musculoskeletal pain relief
- General mobility
Historical use is not evidence that it works.
What has been studied
- Low back pain
- Postoperative recovery
- General musculoskeletal complaints
Current evidence label
Limited / mixed evidence
There is no dedicated NCCIH page for this specific technique; general chiropractic and spinal-manipulation research suggests manual therapies can give modest, short-term relief for some back and musculoskeletal pain, and osteopathic manipulation is generally considered to draw on a similar evidence base, though direct high-quality trials specific to OMT are limited.
Safety
Generally low risk when performed by a licensed osteopathic physician; soreness after a session is common. As with other spinal manipulation, forceful neck techniques carry a rare risk of serious injury.
Avoid or use caution
- Severe osteoporosis, spinal cord compression or recent fracture — discuss with your physician first
- Blood-thinner use — tell the practitioner
Children
Osteopathic physicians treat children with adapted, gentler techniques; confirm pediatric experience.
Pregnancy and breastfeeding
Osteopathic physicians commonly treat pregnancy-related musculoskeletal discomfort with modified techniques; discuss with your obstetric provider.
How it was traditionally prepared
Developed in the late 19th century within American osteopathic medicine, which trains fully licensed physicians who also use manual techniques.
Sources and further reading
- Spinal manipulation — what you need to know — NIH NCCIHU.S. federal health source
- Chiropractic care — in depth — NIH NCCIHU.S. federal health source
- Back pain — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Musculoskeletal / pain
Related remedies
Oyster Mushroom
Pleurotus ostreatus
Traditional use — evidence not establishedA mild, fan-shaped mushroom that is easy to cultivate and widely eaten around the world, of interest mainly as a nutritious, low-calorie food.
Foods & Kitchen RemediesTraditional AsianTraditional European / AmericanGeneral NutritionRead full entryClose entry
Oyster Mushroom
Pleurotus ostreatus
Part used or form
Fresh fruiting body, cooked as food
How it is used
By mouth
Also called
Pleurotus ostreatus · Tree oyster mushroom
Traditional / historical use
- A staple culinary mushroom in East Asian and Eastern European cooking
Historical use is not evidence that it works.
What has been studied
- A source of dietary fiber and modest nutrients within general nutrition research on mushrooms as food
Current evidence label
Traditional use — evidence not established
Oyster mushrooms are studied mainly as a food source of fiber, protein and micronutrients rather than as a medicinal agent; specific health claims beyond general nutrition are not well supported by human research.
Safety
As a cultivated, cooked food, oyster mushroom is safe for most people and carries no specific medicinal-use safety concerns. Undercooked mushrooms of any kind can be harder to digest and occasionally cause stomach upset.
Avoid or use caution
- Known mushroom allergy
Children
A normal cooked food for children; no special medicinal use is intended or advised.
Pregnancy and breastfeeding
An ordinary cooked food in pregnancy; no special restriction is described in general nutrition guidance.
How it was traditionally prepared
Sautéed, grilled or added to soups and stir-fries; always eaten cooked rather than raw.
Sources and further reading
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Papaya (Fruit)
Carica papaya
Limited / mixed evidenceA tropical fruit providing vitamin C and the digestive enzyme papain, eaten ripe as an everyday food across many regions.
Foods & Kitchen RemediesTraditional AsianTraditional African / African DiasporaOther Traditional SystemsDigestionGeneral NutritionRead full entryClose entry
Papaya (Fruit)
Carica papaya
Part used or form
Ripe fruit flesh, eaten as food (distinct from unripe papaya or papaya leaf/seed extracts used medicinally in some traditions)
How it is used
By mouth
Also called
Pawpaw · Papaw
Traditional / historical use
- Everyday eating when ripe
- Green, unripe papaya cooked as a vegetable in some Southeast Asian cuisines
- Papain used traditionally as a meat tenderizer
Historical use is not evidence that it works.
What has been studied
- Vitamin C intake as part of overall diet
- Papain as a digestive enzyme, mainly studied in extract form rather than as ripe fruit
Current evidence label
Limited / mixed evidence
Ripe papaya is a nutritious source of vitamin C and fibre. The enzyme papain, concentrated in unripe fruit and used commercially as a meat tenderizer, has been studied in extract form for digestive and wound-care uses, but evidence for eating ripe papaya as a digestive remedy is limited.
Safety
Ripe papaya flesh is safe as food for most people. Unripe (green) papaya and papaya seeds contain much higher concentrations of active compounds and have a traditional reputation, unproven and best avoided, for helping to bring on menstruation or labor — a real safety concern in pregnancy.
Avoid or use caution
- Unripe/green papaya and papaya seeds in more than small culinary amounts should be avoided in pregnancy due to a traditional and biologically plausible concern about triggering uterine contractions
- Papaya allergy, which can overlap with latex allergy
Children
Ripe papaya, peeled, seeded and cut small, is a common food for young children; papaya seeds should be removed and not given to children.
Pregnancy and breastfeeding
Small amounts of fully ripe papaya as an occasional food are generally considered acceptable by most guidance, but unripe/green papaya and papaya seeds are traditionally avoided in pregnancy due to concerns about uterine effects, and it is reasonable to avoid them.
How it was traditionally prepared
Eaten ripe and fresh, or cooked green as a savory vegetable in some cuisines.
Sources and further reading
- Vitamin C — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Papaya Leaf
Carica papaya
Limited / mixed evidenceThe bitter leaf of the papaya tree, used in Southeast Asian, South Asian and African folk medicine — most notably as a home remedy tried during dengue fever — and distinct from the ripe fruit eaten as food.
Herbs & BotanicalsOther Traditional SystemsTraditional AsianTraditional African / African DiasporaHigh caution — do not self-treatDigestionOtherRead full entryClose entry
Papaya Leaf
Carica papaya
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Not a substitute for emergency medical care in dengue fever or any bleeding illness
Part used or form
Fresh or dried leaf, brewed as tea or juiced
How it is used
By mouth
Also called
Carica papaya leaf
Traditional / historical use
- Traditional remedy tried during dengue fever to support platelet counts
- Digestive complaints
- General bitter tonic use
Historical use is not evidence that it works.
What has been studied
- Platelet count changes in dengue fever (small clinical studies)
Current evidence label
Limited / mixed evidence
A few small clinical studies from dengue-endemic countries have reported papaya leaf extract associated with faster platelet recovery, but studies are small, not consistently well controlled, and papaya leaf is not a substitute for medical monitoring or treatment of dengue.
Safety
Papaya leaf extract is generally used short-term in the studies available; it should never delay emergency or hospital care for dengue fever or any illness with bleeding or low platelets.
Avoid or use caution
- Bleeding disorders
- Any suspected dengue fever or unexplained bleeding — seek emergency medical evaluation rather than relying on a home remedy
Medicine interactions
- May add to the effect of blood-thinning medicines
- May affect blood sugar
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy. Papaya leaf and unripe papaya have a traditional reputation for stimulating the uterus. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh leaves have traditionally been crushed and juiced, or dried and steeped as a bitter tea.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Traditional medicine — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Immune / general wellness
Paprika
Capsicum annuum
Traditional use — evidence not establishedGround dried peppers, ranging from mild and sweet to smoked or hot, central to Hungarian, Spanish and many other cuisines.
Foods & Kitchen RemediesTraditional European / AmericanDigestionGeneral NutritionRead full entryClose entry
Paprika
Capsicum annuum
Part used or form
Dried, ground sweet or hot pepper pods
How it is used
By mouth
Also called
Sweet paprika · Smoked paprika · Hot paprika
Traditional / historical use
- Culinary seasoning and color for stews, meats and rice dishes
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Paprika is primarily a culinary spice; it shares some compounds with cayenne and other capsicum peppers, but paprika itself has not been separately studied as a health remedy.
Safety
Ordinary amounts used to season food are considered safe for most people. Hot paprika varieties can irritate the digestive tract in people sensitive to spicy foods.
Avoid or use caution
- Reflux or a sensitive stomach with hot varieties
Children
Mild sweet paprika is a normal seasoning; hot varieties may be too spicy for young children.
Pregnancy and breastfeeding
Ordinary culinary use is common.
How it was traditionally prepared
Dried pepper pods ground into a fine powder, used to season and color stews, rice and roasted meats.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Parsley
Petroselinum crispum
Traditional use — evidence not establishedA common culinary herb also used in European folk medicine as a mild diuretic and digestive aid, distinct from parsley used simply as a garnish.
Herbs & BotanicalsTraditional European / AmericanUrinaryDigestionGeneral NutritionRead full entryClose entry
Parsley
Petroselinum crispum
Part used or form
Leaf, root and seed
How it is used
By mouth
Also called
Petroselinum
Traditional / historical use
- Water retention (folk diuretic use)
- Digestive discomfort
- Bad breath
- Traditionally used to try to bring on menstruation
Historical use is not evidence that it works.
What has been studied
- Diuretic effect in small studies
- Nutrient content
Current evidence label
Traditional use — evidence not established
Parsley is nutrient-rich as a food, and small studies have looked at a mild diuretic effect, but there is not enough clinical research to confirm medicinal-strength benefits from concentrated parsley extracts or seed preparations.
Safety
Culinary parsley in food is safe. Medicinal amounts of parsley seed or concentrated extract are a different matter and have traditionally been avoided in pregnancy because of a traditional link to uterine stimulation.
Avoid or use caution
- Kidney disease (due to diuretic effect)
- Blood-thinning medicines
Medicine interactions
- May add to the effect of diuretics and blood-thinning medicines
Children
Parsley as a food garnish is fine; medicinal-strength parsley preparations are not a children's remedy.
Pregnancy and breastfeeding
Culinary amounts in food are considered normal. Medicinal amounts and parsley seed extracts have traditionally been avoided in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh or dried leaf and root were used in cooking, teas and traditional decoctions; seeds were used more sparingly in traditional remedies.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Passionflower
Passiflora incarnata
Limited / mixed evidenceA climbing vine of the American southeast, used by Native peoples and later brewed as a calming tea in Europe.
Teas & InfusionsTraditional European / AmericanSerious safety warningSleepStress/AnxietySkinRead full entryClose entry
Passionflower
Passiflora incarnata
Part used or form
Above-ground parts — leaf, stem, flower
Also called
Maypop · Passiflora · Apricot vine
Traditional / historical use
- Restlessness and anxiety
- Sleep
- Wounds (topical)
Historical use is not evidence that it works.
What has been studied
- Anxiety
- Insomnia
- Anxiety before surgery
Current evidence label
Limited / mixed evidence
A few small studies suggest passionflower may have mild calming effects, but the evidence is limited and not conclusive.
Safety
Usually mild drowsiness, dizziness or confusion. Long-term safety is not well studied.
Avoid or use caution
- Do not drive after a sedating dose
- Before surgery
Medicine interactions
- Adds to the effect of sedatives and sleep medicines
- May interact with blood thinners
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried aerial parts were steeped as tea or tinctured.
Sources and further reading
- Passionflower — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Skin · Nervous system / sleep
Pau d'Arco
Tabebuia impetiginosa (also called Handroanthus impetiginosus)
Safety concernThe inner bark of a South American tree, used traditionally as a bitter tonic tea and now sold as a supplement, with real, documented safety limits at higher intakes.
Herbs & BotanicalsOther Traditional SystemsHigh caution — do not self-treatOtherSkinRead full entryClose entry
Pau d'Arco
Tabebuia impetiginosa (also called Handroanthus impetiginosus)
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Reports of nausea, vomiting and bleeding problems, especially at higher intakes
Part used or form
Inner bark, dried and simmered
How it is used
By mouth
Also called
Lapacho · Taheebo · Ipê roxo
Traditional / historical use
- General tonic and 'blood purifier' use
- Skin conditions
- Infections
Historical use is not evidence that it works.
What has been studied
- Anticancer and antimicrobial activity of its compound lapachol in laboratory studies
Current evidence label
Safety concern
Laboratory studies on lapachol, a compound in pau d'arco, showed antitumor and antimicrobial activity, but this has not shown clinical benefit in people and the doses that showed activity in the lab are close to doses that cause toxicity.
Safety
Pau d'arco has a narrow margin between traditional tonic use and toxicity. Reports describe nausea, vomiting, and bleeding problems, particularly at higher intakes, and it should not be combined with other things that affect blood clotting.
Avoid or use caution
- Bleeding disorders or blood-thinning medicines
- Liver conditions
- Upcoming surgery
Medicine interactions
- May increase bleeding risk with blood-thinning medicines
- May affect the liver in combination with other liver-affecting substances
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended in pregnancy or breastfeeding given its documented toxicity concerns. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
The inner bark was traditionally stripped, dried and simmered into a decoction or tea.
Sources and further reading
- Pau d'Arco — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Immune / general wellness
Related remedies
Peanuts
Arachis hypogaea
Some evidenceA legume eaten as a nut, whole, roasted or as peanut butter, widely used across West African, South Asian and American cooking and discussed in nutrition guidance as a plant protein and fat source, and separately as one of the most common food allergens.
Foods & Kitchen RemediesTraditional African / African DiasporaOther Traditional SystemsTraditional European / AmericanHeart/CirculationGeneral NutritionRead full entryClose entry
Peanuts
Arachis hypogaea
Part used or form
Legume seed, whole, roasted, or ground into butter
How it is used
By mouth
Also called
Groundnuts
Traditional / historical use
- A staple ingredient in West African stews and sauces
- An everyday snack and sandwich spread
Historical use is not evidence that it works.
What has been studied
- Blood cholesterol and heart health as part of an overall diet pattern
- Early infant peanut introduction and reducing the risk of developing a peanut allergy
Current evidence label
Some evidence
As with tree nuts, general nutrition guidance links regular peanut intake with more favorable cholesterol markers when peanuts replace less healthy fats. Separately, national infant-feeding guidance now supports introducing peanut-containing foods early in infancy, in an age-appropriate form, as a way to reduce the risk of peanut allergy developing — a specific, well-studied point distinct from any general health claim about peanuts.
Safety
Peanuts are one of the most common and potentially serious food allergens, capable of causing severe reactions including anaphylaxis. Whole peanuts are also a choking hazard for young children.
Avoid or use caution
- Known or suspected peanut allergy — avoid and seek medical guidance
- Whole or chopped peanuts — choking hazard for infants and young children
Children
Whole peanuts should never be given to infants or young children because of choking risk. Age-appropriate peanut-containing foods (such as thinned peanut butter) are now recommended for early introduction in many infants to reduce allergy risk, but this should follow current pediatric guidance, especially if there is eczema or another food allergy already.
Pregnancy and breastfeeding
Ordinary peanut consumption during pregnancy is not discouraged by general nutrition guidance for people without a peanut allergy; anyone with a personal allergy should continue to avoid peanuts as usual.
How it was traditionally prepared
Eaten roasted or boiled whole, ground into peanut butter, or used in sauces and stews.
Sources and further reading
- Food allergy — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Choking — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Child nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Metabolic · Immune / general wellness
Related remedies
Pears
Pyrus communis
Some evidenceA fibre-rich fruit, including a form of fibre (sorbitol) that in larger amounts can loosen stool.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsDigestionGeneral NutritionRead full entryClose entry
Pears
Pyrus communis
Part used or form
Whole fruit, raw or cooked, with or without skin
How it is used
By mouth
Also called
Pear
Traditional / historical use
- Everyday eating
- A gentle first fruit offered to infants and toddlers in many cultures
- Cooked or stewed for eating
Historical use is not evidence that it works.
What has been studied
- Dietary fibre intake and bowel regularity
Current evidence label
Some evidence
Pears are a good source of dietary fibre, and their natural sorbitol content is one reason pear juice and puree are commonly used as a mild dietary approach to constipation in infants and children, an approach reflected in general pediatric nutrition guidance rather than a specific drug claim.
Safety
Safe as food for almost everyone. Large amounts of pear juice can cause loose stools or gas, especially in young children, because of its natural sugar-alcohol content.
Avoid or use caution
- Large amounts of pear juice can cause diarrhea or gas, particularly in infants and young children
Children
Ripe, soft pear or pear puree is a common early food, but raw firm pear chunks are a choking hazard for infants and toddlers and should be cooked soft or cut very small. Excess pear juice can cause loose stools in young children.
Pregnancy and breastfeeding
Ordinary food during pregnancy with no established restriction.
How it was traditionally prepared
Eaten raw, baked, stewed, or juiced.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Constipation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Peppermint Oil
Mentha × piperita
Some evidenceA cooling mint oil long used for stomach complaints and headache, and one of the better-studied herbal products for IBS.
Oils & AromaticsTraditional European / AmericanDigestionCough/ColdPainSkinRead full entryClose entry
Peppermint Oil
Mentha × piperita
Part used or form
Essential oil from leaves; also leaf tea
Also called
Mentha piperita oil · Peppermint · Mint oil
Traditional / historical use
- Upset stomach and gas
- Headache
- Congestion
- Flavouring
Historical use is not evidence that it works.
What has been studied
- Irritable bowel syndrome
- Indigestion
- Tension headache (topical)
Current evidence label
Some evidence
Enteric-coated peppermint oil capsules have reasonable evidence for easing irritable bowel syndrome symptoms in adults. Other uses have weaker support.
Safety
Can cause heartburn, and undiluted oil can irritate skin and mouth. Swallowing large amounts of essential oil is dangerous, and applying it near a baby's or young child's face can cause breathing problems.
Avoid or use caution
- Severe reflux or hiatal hernia
- Gallstones or bile duct problems
- Never apply mint oils to a baby's or toddler's face or chest
Medicine interactions
- May increase blood levels of cyclosporine
- May add to reflux with some medicines
- May affect medicines processed by the liver
Children
Peppermint tea is a common drink, but menthol oils must not be applied near young children's faces and essential oils must never be swallowed by children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Leaves were steeped as tea; the distilled oil was used in drops, rubs and sweets.
Sources and further reading
- Peppermint oil — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Respiratory · Skin · Musculoskeletal / pain
Peppermint Oil (Topical)
Mentha × piperita
Limited / mixed evidenceConcentrated peppermint oil, diluted and rubbed on the temples or chest, or inhaled, for headache and congestion comfort — a different product from peppermint tea.
Oils & AromaticsTraditional European / AmericanOther Traditional SystemsHigh caution — do not self-treatPainCough/ColdRead full entryClose entry
Peppermint Oil (Topical)
Mentha × piperita
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Menthol-containing products applied near a young child's nose or mouth have been linked to serious breathing reactions
Part used or form
Essential oil, diluted and applied to the skin, or inhaled
How it is used
On the skin
Also called
Peppermint oil rub · Diluted peppermint oil
Traditional / historical use
- Headache rubs
- Muscle aches
- Chest rubs for congestion
Historical use is not evidence that it works.
What has been studied
- Tension headache (diluted, applied to forehead/temples)
Current evidence label
Limited / mixed evidence
A few small studies suggest diluted peppermint oil applied to the temples may ease tension headache discomfort, but evidence is limited and most other topical uses are traditional rather than studied.
Safety
For skin or inhaled use only. Never swallowed in oil form. Menthol content can be irritating, especially to broken skin, mucous membranes, and young children.
Avoid or use caution
- Never swallow peppermint essential oil
- Always dilute before applying to skin; keep away from eyes
- Never apply near the face or nose of an infant or young child — menthol can trigger breathing problems
- Patch-test a small area first
Medicine interactions
- None well documented for topical use
Children
Do not apply peppermint or menthol oil near an infant or young child's face or nose — this has been linked to breathing difficulty in young children.
Pregnancy and breastfeeding
Diluted topical use is commonly tolerated, but ask a clinician before regular use in pregnancy.
How it was traditionally prepared
Steam-distilled from mint leaves, historically diluted in carrier oils or made into balms and chest rubs.
Sources and further reading
- Peppermint oil — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Nervous system / sleep
Related remedies
Peppermint Tea
Mentha × piperita
Limited / mixed evidenceMint leaf steeped in hot water — a daily drink across North Africa and the Middle East and a standard after-dinner settler in Europe.
Teas & InfusionsTraditional European / AmericanTraditional African / African DiasporaOther Traditional SystemsDigestionCough/ColdRead full entryClose entry
Peppermint Tea
Mentha × piperita
Part used or form
Fresh or dried leaves steeped in hot water
Also called
Mint tea · Mint infusion · Na'na tea
Traditional / historical use
- Upset stomach and gas
- After meals
- Hospitality and daily drink
- Congestion
Historical use is not evidence that it works.
What has been studied
- Indigestion
- Irritable bowel symptoms (mostly studied as oil capsules)
Current evidence label
Limited / mixed evidence
Most research is on enteric-coated peppermint oil capsules rather than tea. The tea is a pleasant traditional settler with limited direct evidence.
Safety
Very low risk for most adults; can worsen heartburn and reflux.
Avoid or use caution
- Reflux or hiatal hernia
- Never substitute swallowed essential oil for tea
Medicine interactions
- Concentrated peppermint may affect some medicines — see the peppermint oil entry
Children
Weak mint tea is a common household drink, but menthol oils must never be applied near a young child's face.
Pregnancy and breastfeeding
Commonly consumed; ask a midwife if you drink large amounts daily.
How it was traditionally prepared
Fresh sprigs or dried leaf steeped in hot water, often with green tea and sugar.
Sources and further reading
- Peppermint oil — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Indigestion — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Related concerns
Body systems: Digestive · Respiratory
Periwinkle
Catharanthus roseus (Vinca rosea)
Safety concernA flowering plant used historically in traditional Madagascar, Caribbean and Indian medicine for diabetes, and now most notable as the source plant for two prescription cancer chemotherapy drugs. Home use of the raw plant is not supported.
Herbs & BotanicalsOther Traditional SystemsTraditional AsianHistorical remedy onlyHigh caution — do not self-treatMetabolic/Blood SugarOtherRead full entryClose entry
Periwinkle
Catharanthus roseus (Vinca rosea)
Historical remedy only
This entry is here to record what people did in the past. It is not supported for use today, and this page deliberately gives no instructions for using it.
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Toxic if ingested outside of pharmaceutical, medically supervised chemotherapy use
- Not a home remedy for diabetes or any condition
Part used or form
Historically, dried leaf infusion; now mainly known as a source of pharmaceutical compounds
How it is used
By mouth
Also called
Madagascar periwinkle · Vinca · Catharanthus
Traditional / historical use
- Historically used as a folk remedy for diabetes and as a general tonic
Historical use is not evidence that it works.
What has been studied
- Source of vincristine and vinblastine, prescription chemotherapy medicines derived from the plant's alkaloids
Current evidence label
Safety concern
The plant's alkaloids led to real, important chemotherapy drugs, but those are highly purified, precisely dosed pharmaceutical products developed and monitored by oncologists — not something recreated by brewing the raw leaf, which contains a mix of toxic alkaloids in unpredictable amounts.
Safety
The whole plant is toxic if eaten or self-prepared: its alkaloids can damage nerves and blood cell production and have caused serious poisoning. This is described here for historical and educational context only, not as a home remedy.
Avoid or use caution
- Any home preparation or ingestion of the raw plant
Medicine interactions
- Would be expected to interact seriously with other medicines affecting nerves or blood cell counts
Children
Never give any part of this plant to a child; keep it out of reach, as it is toxic if eaten and has been involved in accidental poisonings.
Pregnancy and breastfeeding
Not advised in pregnancy in any home-use form; its known pharmaceutical derivatives are used only under strict cancer-treatment supervision. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Historically, dried leaves were steeped as a folk tea for diabetes in some traditions before its toxicity and pharmaceutical alkaloids were well understood.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- LiverTox — herbal and dietary supplements section — NIH NIDDK / NCBI BookshelfU.S. federal health source
- Cancer — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Metabolic
Pine Needle
Pinus spp.
Traditional use — evidence not establishedThe fresh green needles of edible pine species, traditionally steeped into a vitamin-C-rich tea in northern and Indigenous North American traditions, especially for colds.
Teas & InfusionsTraditional European / AmericanOther Traditional SystemsHigh caution — do not self-treatCough/ColdGeneral NutritionRead full entryClose entry
Pine Needle
Pinus spp.
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Misidentified conifer needles (e.g. yew, some ornamental species) can be toxic — this is not a foraging guide
Part used or form
Fresh needle, steeped as tea
How it is used
By mouth
Also called
Pine needle tea
Traditional / historical use
- Colds and mild vitamin C support
- General winter tonic use
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Pine needle tea's traditional reputation rests largely on its vitamin C content; there is no clinical trial evidence for the brewed tea itself.
Safety
Not all pine species are safe: needles must come from a confirmed edible species, since some ornamental conifers (for example ponderosa pine and ponderosa-like species) and unrelated 'pine-like' plants such as yew are unsafe or toxic. This entry does not identify species for the reader and is not a foraging guide.
Avoid or use caution
- Any conifer needle not positively identified by an expert as an edible pine species
- Pregnancy, out of caution given historical warnings about certain pine/conifer species affecting pregnancy in livestock
Medicine interactions
- Limited data on drug interactions
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy without professional species identification and medical advice, given documented toxicity of some look-alike conifers. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh young needles from a confirmed edible species have traditionally been chopped and steeped in hot water.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Traditional medicine — fact sheet — World Health OrganizationInternational government / WHO / EMA
- Vitamin C — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Respiratory · Immune / general wellness
Pineapple
Ananas comosus
Limited / mixed evidenceA tropical fruit rich in vitamin C and containing the enzyme bromelain, which is studied mainly as a concentrated supplement rather than from eating the fruit.
Foods & Kitchen RemediesOther Traditional SystemsTraditional European / AmericanDigestionGeneral NutritionRead full entryClose entry
Pineapple
Ananas comosus
Part used or form
Whole fruit flesh; bromelain (an enzyme) as a separate extract is covered under its own entry
How it is used
By mouth
Also called
Ananas
Traditional / historical use
- Everyday eating
- Traditional garnish for meat dishes, using its enzyme to help tenderize
Historical use is not evidence that it works.
What has been studied
- Vitamin C intake as part of overall diet
- Bromelain, studied separately as a concentrated extract for inflammation and digestion
Current evidence label
Limited / mixed evidence
Fresh pineapple provides vitamin C and modest amounts of the enzyme bromelain. Most research on bromelain's anti-inflammatory or digestive effects uses purified extract at levels well above what eating fruit provides, so specific medicinal claims belong to the separate bromelain entry rather than the whole fruit.
Safety
Safe as food for most people. The bromelain in fresh pineapple can irritate the mouth or tongue with heavy eating, and unripe pineapple has a traditional reputation for being harsher on the stomach.
Avoid or use caution
- Mouth or tongue irritation with large amounts of fresh pineapple, due to natural enzyme content
Children
Ripe pineapple cut into small, soft pieces is fine for most children; very acidic fresh juice can irritate a young child's mouth.
Pregnancy and breastfeeding
Ordinary amounts of ripe pineapple as food are considered fine in pregnancy; the old folk claim that pineapple can induce labor is not supported by evidence at food amounts.
How it was traditionally prepared
Eaten fresh, grilled, juiced, or used as a natural meat marinade because of its enzyme content.
Sources and further reading
- Vitamin C — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Immune / general wellness
Related remedies
Pistachios
Pistacia vera
Some evidenceA tree nut eaten whole as a snack or ground into pastes, discussed in nutrition guidance as a source of unsaturated fat, fiber and plant protein.
Foods & Kitchen RemediesOther Traditional SystemsTraditional European / AmericanTraditional AsianHeart/CirculationGeneral NutritionRead full entryClose entry
Pistachios
Pistacia vera
Part used or form
Tree nut seed, whole or shelled
How it is used
By mouth
Traditional / historical use
- An everyday snack and cooking ingredient across the Middle East, Mediterranean and Central Asia
Historical use is not evidence that it works.
What has been studied
- Blood cholesterol and heart health as part of an overall diet pattern that includes nuts
Current evidence label
Some evidence
General nutrition guidance associates regular nut intake, including pistachios, with more favorable cholesterol levels when nuts replace less healthy fats in the diet. This reflects an overall dietary pattern rather than pistachios acting as a standalone treatment.
Safety
Tree nuts are a major food allergen, and pistachio allergy can be serious. Whole nuts are also a well-documented choking hazard for young children.
Avoid or use caution
- Known tree nut allergy — avoid
- Whole nuts — choking hazard for infants and young children
Children
Whole pistachios should not be given to infants and young children because of choking risk; finely ground or nut-butter forms can be considered from an appropriate age if there is no nut allergy, following usual pediatric feeding guidance.
Pregnancy and breastfeeding
An ordinary food during pregnancy for people without a nut allergy; introducing nuts during pregnancy is not discouraged by general nutrition guidance.
How it was traditionally prepared
Eaten roasted and salted as a snack, or ground into pastes and used in desserts and savory dishes.
Sources and further reading
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Food allergy — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Choking — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Plantain Leaf
Plantago major / Plantago lanceolata
Traditional use — evidence not establishedA common lawn and roadside weed (not the banana-like plantain fruit) whose broad leaves have long been crushed and applied to insect bites, stings and minor skin irritation in European and North American folk tradition.
Topical / SkinTraditional European / AmericanOther Traditional SystemsSerious safety warningSkinInflammationRead full entryClose entry
Plantain Leaf
Plantago major / Plantago lanceolata
Part used or form
Fresh or dried leaf
How it is used
On the skin
Also called
Broadleaf plantain · Ribwort plantain · Plantago
Traditional / historical use
- Insect bites and stings
- Minor cuts and scrapes
- Skin irritation from nettles or poison ivy
- Chewed leaf poultice for splinters
Historical use is not evidence that it works.
What has been studied
- Wound-healing compounds in laboratory studies
Current evidence label
Traditional use — evidence not established
Laboratory studies have identified compounds in plantain leaf with anti-inflammatory and wound-healing activity, but there is little rigorous human clinical research on the crushed-leaf poultice itself.
Safety
Applied to unbroken or minor irritated skin, plantain leaf is generally considered low-risk; it should not be used as a substitute for medical care on deep wounds, infected skin, or serious bites and stings.
Avoid or use caution
- Deep or infected wounds
- Signs of a serious allergic reaction to a sting or bite — seek emergency care
Children
A crushed plantain leaf applied briefly to an insect bite is a common, low-risk folk practice, but any child's wound, spreading rash or signs of infection should be seen by a doctor.
Pregnancy and breastfeeding
Topical use on intact skin is traditionally considered low-risk in pregnancy, but ask a doctor or midwife before using any herbal remedy regularly.
How it was traditionally prepared
Fresh leaves have traditionally been crushed, chewed, or briefly steeped in hot water and applied directly to the skin as a poultice.
Sources and further reading
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Wounds and injuries — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Related remedies
Plums
Prunus domestica
Limited / mixed evidenceA stone fruit closely related to prunes (dried plums), providing fibre and antioxidant compounds when eaten fresh.
Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianDigestionGeneral NutritionRead full entryClose entry
Plums
Prunus domestica
Part used or form
Whole fresh fruit (distinct from prunes, its dried form, which has its own entry)
How it is used
By mouth
Also called
Plum
Traditional / historical use
- Everyday eating
- Drying into prunes as a traditional preservation method
Historical use is not evidence that it works.
What has been studied
- Fibre and antioxidant intake as part of overall diet
Current evidence label
Limited / mixed evidence
Fresh plums provide dietary fibre and antioxidant plant compounds. Most of the specific research on bowel regularity relates to their dried form, prunes, where the effect is better established; fresh plums are reasonably assumed to share some of that fibre effect but have been studied less directly themselves.
Safety
Safe as food for almost everyone. Plum pits contain a small amount of a cyanide-forming compound and should not be cracked open and eaten, and whole plums are a choking hazard for young children if not pitted and cut.
Avoid or use caution
- Plum pits should never be cracked and eaten
- Eating large amounts of fresh plums can have a mild laxative effect
Children
Remove the pit and cut into small pieces for young children; whole plums are a choking hazard.
Pregnancy and breastfeeding
Ordinary food during pregnancy with no established restriction.
How it was traditionally prepared
Eaten fresh, stewed, baked into desserts, or dried into prunes.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Constipation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Pomegranate
Punica granatum
Limited / mixed evidenceAn ancient Middle Eastern and South Asian fruit, symbolically important in many cultures and now sold as a heart-health juice.
Foods & Kitchen RemediesTraditional AsianTraditional European / AmericanOther Traditional SystemsSore ThroatSkinUrinaryHeart/CirculationMetabolic/Blood SugarRead full entryClose entry
Pomegranate
Punica granatum
Part used or form
Fruit seeds and juice; also peel and flower traditionally
Also called
Punica · Anar
Traditional / historical use
- Digestive complaints
- Sore throat
- Intestinal parasites (peel/bark)
- Food and drink
Historical use is not evidence that it works.
What has been studied
- Heart health and blood pressure
- Prostate cancer markers
- Diabetes
- Exercise recovery
Current evidence label
Limited / mixed evidence
Pomegranate juice has been studied for heart and prostate measures with mixed results. It is a nutritious juice, not a proven treatment.
Safety
The fruit and juice are generally safe. Concentrated root, bark or peel preparations can be harmful.
Avoid or use caution
- Do not use root or bark preparations
- Diabetes — watch juice sugar
- Ask a pharmacist if you take blood-pressure or statin medicines
Medicine interactions
- May affect medicines processed by the liver, similar in principle to grapefruit
- May add to the effect of blood-pressure medicines
Children
Pomegranate is a food. Whole seeds are a choking risk for very young children.
Pregnancy and breastfeeding
Fruit and juice are ordinary food. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Seeds eaten fresh, juice pressed and boiled into molasses, peel dried for traditional preparations.
Sources and further reading
- Pomegranate — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory · Skin · Cardiovascular · Metabolic · Urinary
Poppy Seed
Papaver somniferum
Traditional use — evidence not establishedTiny dried seeds from the opium poppy plant, used whole or ground in baking and some South Asian sauces; the mature seeds themselves contain very little of the plant's narcotic compounds but can carry surface residue.
Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianHigh caution — do not self-treatDigestionGeneral NutritionOtherRead full entryClose entry
Poppy Seed
Papaver somniferum
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Tea or extracts made from raw, unprocessed poppy pods/seeds have caused serious opioid poisoning and death and are not a safe food preparation
Part used or form
Dried seed, whole or ground
How it is used
By mouth
Also called
Culinary poppy seed
Traditional / historical use
- Flavoring and texture in breads, cakes and sauces
- Traditional use as a thickener in some South and Southeast Asian dishes
Historical use is not evidence that it works.
What has been studied
- Poppy seed residue and its effect on drug-test results, studied and documented
Current evidence label
Traditional use — evidence not established
Culinary poppy seed is a well-documented food ingredient. There is no clinical evidence it treats any condition; the relevant research is about food-safety questions, such as trace opiate residue affecting drug screening results after eating poppy-seed foods.
Safety
Ordinary culinary poppy seed in baked goods is considered safe as food. Unwashed seeds can carry trace amounts of morphine and codeine on their surface, which is why eating poppy-seed foods can occasionally cause a positive drug-screening test, and why raw, unprocessed poppy pods or 'poppy seed tea' made from them are not a safe food use and have caused serious opioid toxicity.
Avoid or use caution
- Homemade tea or extract made from raw poppy pods or seeds, which can deliver dangerous opioid amounts
- Upcoming drug screening, where recent poppy-seed food intake should be disclosed
Medicine interactions
- May interact with drug testing (false-positive opioid screens after eating poppy-seed foods)
Children
Ordinary poppy seed in commercial baked goods is a normal food. Homemade preparations from raw poppy plant material are never appropriate for children.
Pregnancy and breastfeeding
Ordinary culinary use in baked goods is common. Any homemade preparation from raw poppy plant material must be avoided. Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract.
How it was traditionally prepared
Dried seeds used whole as a topping or ground into pastes for fillings and sauces.
Sources and further reading
- Poisoning — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Food safety — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Prayer and Spiritual Practice as a Coping Approach
Traditional use — evidence not establishedPersonal or communal prayer and spiritual practice, used across essentially every culture and faith tradition as a way of finding meaning and coping with illness, stress, or loss.
Mind-Body / Non-Drug PracticesTraditional African / African DiasporaTraditional AsianTraditional European / AmericanOther Traditional SystemsStress/AnxietyOtherRead full entryClose entry
Prayer and Spiritual Practice as a Coping Approach
Part used or form
Personal or communal prayer, worship, or spiritual reflection practiced regularly
How it is used
Whole-body practice
Also called
Faith-based coping · Religious coping practices
Traditional / historical use
- Coping with illness, grief, and life stress
- Community and social support through congregations
- Personal meaning and comfort
Historical use is not evidence that it works.
What has been studied
- Coping with chronic illness and stress (observational research, mostly on religious/spiritual coping in general, not prayer as an isolated technique)
Current evidence label
Traditional use — evidence not established
Research on religion, spirituality, and health is mostly observational and looks at broad religious or spiritual involvement rather than testing prayer on its own as an intervention; findings are mixed and depend heavily on personal meaning, so this cannot honestly be presented as a treatment with measured medical effects. There is no dedicated NCCIH or MedlinePlus page specific to prayer as a technique — the citations here are general mind-body and coping resources rather than prayer-specific evidence.
Safety
No physical risk from the practice itself. It should never be presented as a substitute for medical treatment, and a person's own beliefs and preferences should always be respected rather than directed by others.
Avoid or use caution
- Never as a substitute for emergency or prescribed medical care
- Respect that this is a personal choice, not a recommended medical intervention
Children
Any spiritual practice with children should follow the family's own beliefs and comfort level; it is not a medical treatment.
Pregnancy and breastfeeding
No physical risk; a personal and cultural choice rather than a medical intervention.
How it was traditionally prepared
Prayer and spiritual practice as a way of coping with illness and hardship is documented across virtually all recorded human cultures and faith traditions.
Sources and further reading
- Coping with chronic illness — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Mind and body practices — overview — NIH NCCIHU.S. federal health source
- Mental health — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep
Related remedies
Progressive Muscle Relaxation
Some evidenceA step-by-step technique of tensing and then releasing muscle groups, one at a time, to notice and reduce physical tension.
Mind-Body / Non-Drug PracticesTraditional European / AmericanStress/AnxietySleepPainRead full entryClose entry
Progressive Muscle Relaxation
Part used or form
Structured tense-and-release muscle exercise
How it is used
Whole-body practice — usually done lying or sitting still
Also called
PMR · Jacobson relaxation technique
Traditional / historical use
- Easing muscle tension
- Calming before sleep
Historical use is not evidence that it works.
What has been studied
- Anxiety
- Sleep
- Headache
- Blood pressure
Current evidence label
Some evidence
Progressive muscle relaxation has reasonable evidence for reducing anxiety and helping with sleep, with a good safety record because it requires no equipment or substances.
Safety
Low risk. Tensing muscles too hard can cause cramping, and people with certain muscle or joint injuries should tense gently or skip affected areas.
Avoid or use caution
- Recent muscle or joint injury — tense gently or skip that area
- Stop if a movement causes pain rather than mild tension
Children
Simplified versions are used with children and are generally low risk.
Pregnancy and breastfeeding
Generally considered safe; ease off tensing the abdominal muscles.
How it was traditionally prepared
Developed by physician Edmund Jacobson in the early 20th century and widely adapted since.
Sources and further reading
- Relaxation techniques — what you need to know — NIH NCCIHU.S. federal health source
- Stress — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy sleep — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Musculoskeletal / pain
Related remedies
Prunes and Prune Juice
Prunus domestica
Some evidenceDried plums, long used as a gentle household answer to constipation because they combine fibre with natural sugars that draw water into the bowel.
Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianDigestionCough/ColdSkinRead full entryClose entry
Prunes and Prune Juice
Prunus domestica
Part used or form
Dried fruit and its juice
Also called
Dried plums · Plum juice
Traditional / historical use
- Constipation
- Everyday food
Historical use is not evidence that it works.
What has been studied
- Constipation and stool frequency
Current evidence label
Some evidence
Increasing fibre and fluid — including from fruits such as prunes — is standard first-line advice for constipation.
Safety
Generally safe as food; can cause gas, cramping and loose stools, and they are high in sugar.
Avoid or use caution
- Bowel obstruction or severe abdominal pain — get medical care
- Diabetes — watch juice sugar
- Constipation with blood, weight loss or lasting change in habits needs a doctor
Medicine interactions
- Fibre can slow absorption of medicines taken at the same time
- Sugar content matters in diabetes
Children
Prunes and prune juice are foods often suggested for constipated children, but ask a doctor or pharmacist before treating a young child's constipation.
Pregnancy and breastfeeding
Ordinary food; constipation is common in pregnancy — ask a midwife if it persists.
How it was traditionally prepared
Plums sun-dried for winter storage; stewed prunes and prune juice are traditional breakfasts.
Sources and further reading
- Constipation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Related concerns
Body systems: Digestive · Respiratory · Skin
Psyllium
Plantago ovata
Some evidenceA soluble fiber from the husk of a plantain seed, used traditionally in South Asia and now a common over-the-counter fiber supplement.
Herbs & BotanicalsTraditional AsianDigestionHeart/CirculationRead full entryClose entry
Psyllium
Plantago ovata
Part used or form
Husk of the seed, ground into a soluble fiber
How it is used
By mouth
Also called
Ispaghula · Plantago husk
Traditional / historical use
- Constipation
- Diarrhea
- General digestive regularity
Historical use is not evidence that it works.
What has been studied
- Constipation
- Cholesterol lowering
- Blood sugar response after meals
- Irritable bowel symptoms
Current evidence label
Some evidence
Psyllium is one of the better-studied fibers: good evidence supports its use for constipation, and there is reasonable evidence it can modestly lower cholesterol as part of an overall diet. Effects on blood sugar and IBS symptoms are more mixed.
Safety
Psyllium is generally safe when taken with enough fluid. Taken without enough liquid, fiber supplements can cause choking or worsen blockage in someone with a narrowed esophagus or bowel.
Avoid or use caution
- Difficulty swallowing
- Known bowel narrowing or blockage
- Take with plenty of water
Medicine interactions
- Can reduce absorption of some oral medicines if taken at the same time, so is usually spaced apart from other medicines
Children
Fiber supplements for children should only be used on a doctor's advice; this library gives no amounts.
Pregnancy and breastfeeding
Fiber supplements are commonly used for constipation in pregnancy, but check with a doctor or midwife first. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally the husk was soaked or stirred into water or milk and drunk promptly, a form still used today.
Sources and further reading
- Constipation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular
Related remedies
Pumpkin Seeds
Cucurbita pepo (seed)
Traditional use — evidence not establishedThe edible seed of the pumpkin and related squashes, traditionally eaten across the Americas and now a common snack seed worldwide.
Foods & Kitchen RemediesOther Traditional SystemsTraditional European / AmericanGeneral NutritionRead full entryClose entry
Pumpkin Seeds
Cucurbita pepo (seed)
Part used or form
Roasted or raw hulled seed
How it is used
By mouth
Also called
Pepitas
Traditional / historical use
- Traditional Central and South American food (pepitas)
- A snack food and garnish
Historical use is not evidence that it works.
What has been studied
- General nutrient intake (magnesium, zinc, healthy fats)
Current evidence label
Traditional use — evidence not established
Pumpkin seeds are a nutrient-dense food source of unsaturated fat, plant protein, magnesium and zinc, but there is not strong clinical trial evidence that eating them treats or prevents a specific condition; their place is as a nutritious ordinary food.
Safety
Very low risk as food. Seed allergies are less common than tree nut or peanut allergy but do occur. Whole seeds are calorie-dense and can be a choking hazard for young children.
Avoid or use caution
- Seed allergy, if known
- Whole seeds are a choking hazard for young children
Children
Hulled, softened, or ground pumpkin seeds are safer for young children than whole crunchy seeds, which are a choking risk.
Pregnancy and breastfeeding
Ordinary food.
How it was traditionally prepared
Roasted with or without salt, hulled and eaten raw, or ground into butters and sauces.
Sources and further reading
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary proteins — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Metabolic · Immune / general wellness
Related remedies
Pygeum
Prunus africana
Limited / mixed evidenceThe bark of an African evergreen tree, used traditionally in African herbal medicine and now sold internationally as a supplement for urinary symptoms linked to an enlarged prostate.
Herbs & BotanicalsTraditional African / African DiasporaUrinaryRead full entryClose entry
Pygeum
Prunus africana
Part used or form
Dried bark extract
How it is used
By mouth
Also called
African plum bark · Pygeum africanum
Traditional / historical use
- Urinary symptoms in older men
- General male reproductive tonic use
Historical use is not evidence that it works.
What has been studied
- Symptoms of benign prostatic hyperplasia (enlarged prostate)
Current evidence label
Limited / mixed evidence
Some clinical trials suggest pygeum bark extract may modestly ease urinary symptoms of an enlarged prostate, but many older trials were small or poorly designed, and it is not a substitute for prostate evaluation.
Safety
Short-term use in studies has generally been well tolerated, with mild stomach upset the most common complaint reported.
Avoid or use caution
- Unevaluated urinary symptoms — new or worsening urinary problems should be checked by a doctor before self-treating
Medicine interactions
- Limited data on drug interactions
Children
Not relevant for children; pygeum is used only in adult male urinary health contexts and should not be given to a child.
Pregnancy and breastfeeding
Not applicable to pregnancy; this remedy is used specifically for prostate-related urinary symptoms in men.
Rules and regulation
Prunus africana bark harvesting has raised conservation concerns, and wild populations are protected in parts of its range.
How it was traditionally prepared
Dried bark has traditionally been ground and prepared as a decoction, and is now mostly sold as a standardized extract.
Sources and further reading
- Enlarged prostate (BPH) — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Urinary · Reproductive / menstrual / menopause
Related remedies
Qigong
Limited / mixed evidenceA Chinese practice of slow movement, breath control and focused attention, historically linked to traditional Chinese medicine's concept of cultivating qi; closely related to tai chi but generally simpler and more repetitive in form.
Mind-Body / Non-Drug PracticesTraditional AsianStress/AnxietyHeart/CirculationOtherRead full entryClose entry
Qigong
Part used or form
Slow movement, breathing and focused attention, practised standing or seated
How it is used
Whole-body practice
Also called
Chi kung · Qi gong
Traditional / historical use
- Health maintenance
- Cultivating vitality within traditional Chinese medicine
- Calm and balance
Historical use is not evidence that it works.
What has been studied
- Stress
- Balance
- Blood pressure
- General wellbeing
- Fatigue
Current evidence label
Limited / mixed evidence
Qigong has been studied less than tai chi, and results for stress, balance and wellbeing are generally positive but come from smaller and more mixed-quality trials, so findings are considered preliminary.
Safety
Low risk and gentle on the joints; occasional muscle soreness is the main complaint.
Avoid or use caution
- Recent injury or severe osteoporosis — ask a clinician before starting
- Learn from a qualified instructor who can adapt movements
Children
Generally low risk and sometimes taught in school wellness programs.
Pregnancy and breastfeeding
Generally considered safe; ask an instructor about modifying balance-challenging postures.
Historical and cultural background
Closely tied to Chinese traditional medicine's concept of qi; described here as a documented practice, not as evidence that the concept of qi has been scientifically confirmed.
How it was traditionally prepared
Practised for centuries in China as part of health cultivation and martial-arts traditions, traditionally outdoors in groups.
Sources and further reading
- Qigong — what the science says — NIH NCCIHU.S. federal health source
- Mind and body practices — overview — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Musculoskeletal / pain · Cardiovascular
Related remedies
Quinoa
Chenopodium quinoa
Limited / mixed evidenceA seed native to the Andes, cooked and eaten like a grain, notable in nutrition guidance as a naturally gluten-free source of complete plant protein and fiber.
Foods & Kitchen RemediesOther Traditional SystemsDigestionMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Quinoa
Chenopodium quinoa
Part used or form
Whole seed, cooked like a grain
How it is used
By mouth
Also called
Quinua
Traditional / historical use
- A staple food in Andean South America for thousands of years
Historical use is not evidence that it works.
What has been studied
- Fiber and protein intake as part of an overall diet
- As a gluten-free grain alternative for people avoiding wheat
Current evidence label
Limited / mixed evidence
Quinoa is a nutrient-dense whole grain alternative studied mainly for its fiber and complete amino acid profile; direct evidence that it outperforms other whole grains for specific health outcomes is limited, but it fits comfortably within general healthy-eating guidance as a whole-grain-like food.
Safety
Very low risk as food. Quinoa seeds carry a bitter natural coating (saponins) that is removed by rinsing and processing before sale; commercially available quinoa is safe when cooked normally.
Avoid or use caution
- Rinse quinoa before cooking if it has not been pre-rinsed, to remove bitterness
Children
A suitable grain alternative for children, including those avoiding gluten; cook until soft for young children.
Pregnancy and breastfeeding
An ordinary, nutritious food during pregnancy; no special restriction described in general nutrition guidance.
How it was traditionally prepared
Rinsed and simmered in water like rice, or added to soups, salads and baked goods.
Sources and further reading
- Dietary proteins — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Celiac disease — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
Raisins
Vitis vinifera (dried)
Some evidenceDried grapes, one of the most common dried fruits, providing concentrated fibre, potassium and natural sugar in a small, shelf-stable form.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsDigestionGeneral NutritionRead full entryClose entry
Raisins
Vitis vinifera (dried)
Part used or form
Dried grape fruit
How it is used
By mouth
Also called
Dried grapes · Sultanas · Currants (dried, culinary)
Traditional / historical use
- A traditional preserved snack and baking ingredient across many cuisines
- Portable trail and travel food historically
Historical use is not evidence that it works.
What has been studied
- Fibre and antioxidant intake from dried fruit as part of overall diet
Current evidence label
Some evidence
Raisins carry over much of the fibre and some of the antioxidant content of grapes into a shelf-stable, concentrated form, along with concentrated natural sugar. They fit general nutrition guidance as a fibre-containing snack food eaten in modest portions, not as a specific remedy for any condition.
Safety
Safe as food for most people. Their sticky sugar clings to teeth more than fresh grapes, and their small, chewy size is a genuine choking hazard for infants and toddlers.
Avoid or use caution
- Concentrated sugar content is relevant for people managing diabetes or dental health
Children
Whole raisins are a well-documented choking hazard for infants and toddlers; chop them or soften them, and offer only under supervision to young children.
Pregnancy and breastfeeding
Ordinary amounts of raisins as a snack are fine in pregnancy.
How it was traditionally prepared
Made by sun-drying or mechanically dehydrating grapes; used in baking, trail mixes, and as a standalone snack.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Choking — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
Raspberries
Rubus idaeus
Some evidenceA berry fruit notably high in dietary fibre as well as vitamin C, distinct from raspberry leaf tea, which is a different traditional preparation of the plant.
Foods & Kitchen RemediesTraditional European / AmericanDigestionGeneral NutritionRead full entryClose entry
Raspberries
Rubus idaeus
Part used or form
Whole fresh fruit (distinct from raspberry leaf, which has its own entry)
How it is used
By mouth
Also called
Raspberry
Traditional / historical use
- Everyday eating
- Preserves and baking
Historical use is not evidence that it works.
What has been studied
- Dietary fibre and antioxidant intake as part of overall diet
Current evidence label
Some evidence
Raspberries are one of the higher-fibre fruits eaten in typical amounts, alongside vitamin C and antioxidant plant compounds. As with other berries, population-level nutrition evidence links regular berry intake with better cardiovascular and metabolic markers as part of an overall diet, not as an isolated remedy.
Safety
Safe as food for almost everyone. Berry allergy is uncommon but reported.
Avoid or use caution
- Known berry allergy, which is uncommon
Children
A soft, easy fruit for children once solids are introduced; wash well before serving.
Pregnancy and breastfeeding
Ordinary food during pregnancy with no special restriction; note this is a different product from raspberry leaf tea, which has its own separate pregnancy guidance.
How it was traditionally prepared
Eaten fresh, frozen, or made into preserves.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Antioxidants — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular
Related remedies
Raspberry Leaf
Rubus idaeus
Limited / mixed evidenceThe leaf of the raspberry plant, long used as a tea in late pregnancy in European and North American folk tradition, separate from the fruit.
Herbs & BotanicalsTraditional European / AmericanMenstrual/MenopauseDigestionRead full entryClose entry
Raspberry Leaf
Rubus idaeus
Part used or form
Dried leaf, as tea
How it is used
By mouth
Also called
Red raspberry leaf
Traditional / historical use
- Toning the uterus in the weeks before labor (folk tradition)
- General women's tonic tea
- Mild diarrhea
Historical use is not evidence that it works.
What has been studied
- Labor length and outcomes in small trials
Current evidence label
Limited / mixed evidence
A small number of clinical trials have looked at raspberry leaf tea taken in late pregnancy; results are mixed and the studies are small, so it has not been shown to reliably shorten labor or change outcomes.
Safety
Raspberry leaf tea appears to be well tolerated by most people when used the way it is traditionally used, in the later stage of pregnancy.
Avoid or use caution
- Early pregnancy — traditional use is specifically for the later weeks, not early pregnancy
Medicine interactions
- Limited formal interaction data
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Traditionally used only in the final weeks of pregnancy and not earlier; discuss with a doctor or midwife before use at any stage.
How it was traditionally prepared
Dried leaves were traditionally steeped as a tea, often blended with other herbs.
Sources and further reading
- Menstruation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Reproductive / menstrual / menopause
Related remedies
Red Clover
Trifolium pratense
Limited / mixed evidenceA meadow flower used as a folk cough and skin remedy, now sold mainly for menopause symptoms because it contains plant oestrogens.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningCough/ColdSkinMenstrual/MenopauseHeart/CirculationRead full entryClose entry
Red Clover
Trifolium pratense
Part used or form
Flower heads
Also called
Trifolium · Cow clover · Meadow clover
Traditional / historical use
- Cough and bronchitis
- Skin conditions
- Blood 'purifying' tonics
Historical use is not evidence that it works.
What has been studied
- Hot flashes and menopause symptoms
- Bone density
- Cholesterol
Current evidence label
Limited / mixed evidence
Studies of red clover isoflavones for hot flashes have been mixed, and overall have not clearly shown benefit.
Safety
Generally mild side effects such as headache and rash. Because it contains plant oestrogens, hormone-sensitive conditions call for caution.
Avoid or use caution
- History of breast, ovarian or uterine cancer — ask an oncologist
- Blood-thinner use
- Before surgery
Medicine interactions
- May interact with hormonal treatments, including tamoxifen and birth control
- May increase bleeding risk with blood thinners
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried flower heads were steeped as tea, made into syrups, or used in salves.
Sources and further reading
- Red clover — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory · Skin · Cardiovascular · Reproductive / menstrual / menopause
Reflexology
Limited / mixed evidenceA hands-on therapy based on the idea that specific points on the feet, hands and ears correspond to other organs and body parts, and that pressing them can promote relaxation or relieve symptoms elsewhere.
Mind-Body / Non-Drug PracticesTraditional AsianTraditional European / AmericanStress/AnxietyPainNauseaRead full entryClose entry
Reflexology
Part used or form
Firm pressure applied to specific points on the feet, hands or ears
How it is used
On the skin — hands-on pressure work
Also called
Zone therapy · Foot reflexology
Traditional / historical use
- Relaxation
- General wellbeing
- Symptom relief believed to correspond to specific organs
Historical use is not evidence that it works.
What has been studied
- Anxiety
- Pain
- Nausea
- Quality of life during cancer treatment
Current evidence label
Limited / mixed evidence
Studies of reflexology are small and often poorly controlled; some report modest short-term relaxation or symptom relief, but there is no reliable evidence that pressing specific foot or hand points affects distant organs as the underlying theory claims.
Safety
Generally low risk when done by a trained practitioner using moderate pressure. Firm pressure can be uncomfortable, and it should not delay evaluation of an underlying medical problem.
Avoid or use caution
- Foot injuries, infections, blood clots or severe circulation problems — ask a clinician first
- Do not use reflexology in place of diagnosis or treatment for a medical condition
Children
Gentle foot massage is generally low risk; treat reflexology as relaxation rather than treatment for a child's medical condition.
Pregnancy and breastfeeding
Some practitioners avoid certain foot points traditionally linked to labor; tell the practitioner you are pregnant and ask a midwife first.
How it was traditionally prepared
Modern reflexology charts were popularized in the early 20th century in the US, though pressure-point foot practices exist in older Chinese and Egyptian records.
Sources and further reading
- Reflexology — NIH NCCIHU.S. federal health source
- Mind and body practices — overview — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep
Related remedies
Reishi Mushroom
Ganoderma lucidum
Limited / mixed evidenceA woody mushroom long used in traditional Chinese medicine as a tonic for longevity and vitality, now sold as capsules, powders and extracts.
Herbs & BotanicalsTraditional AsianSerious safety warningOtherHeart/CirculationRead full entryClose entry
Reishi Mushroom
Ganoderma lucidum
Part used or form
Dried fruiting body or spore extract
How it is used
By mouth
Also called
Lingzhi · Ganoderma
Traditional / historical use
- General tonic for vitality and longevity ('the mushroom of immortality')
- Supporting the immune system
- Calming the spirit / sleep
Historical use is not evidence that it works.
What has been studied
- Immune function alongside cancer treatment
- Fatigue
- Blood sugar and cholesterol
Current evidence label
Limited / mixed evidence
Some small studies suggest reishi may affect immune markers or fatigue, but research in people is limited, often industry-funded, and not strong enough to confirm meaningful benefit for any condition.
Safety
Reishi is generally tolerated in short-term use, but reports describe stomach upset, dizziness and, uncommonly, liver problems with concentrated extracts, especially powdered spore forms.
Avoid or use caution
- Bleeding disorders or blood thinners
- Low blood pressure
- Upcoming surgery
- Autoimmune conditions
Medicine interactions
- May add to the effect of blood-thinning medicines
- May add to the effect of blood pressure medicines
- May affect the immune system, which matters with immune-suppressing medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
The tough, woody mushroom was traditionally simmered for hours into a bitter decoction, since it is too hard to eat directly.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Dietary and herbal supplements — what to know — NIH NCCIHU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Immune / general wellness
Related remedies
Rhodiola
Rhodiola rosea
Limited / mixed evidenceA cold-climate mountain root used in Scandinavia and Russia for endurance and fatigue.
Herbs & BotanicalsTraditional European / AmericanTraditional AsianStress/AnxietyCough/ColdRead full entryClose entry
Rhodiola
Rhodiola rosea
Part used or form
Root
Also called
Golden root · Arctic root · Rhodiola rosea
Traditional / historical use
- Fatigue and endurance
- Cold-weather stamina
- Low mood
Historical use is not evidence that it works.
What has been studied
- Fatigue
- Stress
- Mental performance
- Depression
Current evidence label
Limited / mixed evidence
Small studies suggest possible effects on fatigue and stress, but the trials are few, short and varied, so nothing is established.
Safety
Usually well tolerated; dizziness, dry mouth and jitteriness are reported.
Avoid or use caution
- Bipolar disorder — stimulating herbs need care
- Before surgery
Medicine interactions
- May affect medicines processed by the liver
- May add to the effect of antidepressants and stimulants
- May affect blood sugar and blood pressure medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
The root was traditionally brewed as a tea or steeped in spirits.
Sources and further reading
- Rhodiola — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory · Nervous system / sleep
Rooibos Tea
Aspalathus linearis
Traditional use — evidence not establishedA naturally caffeine-free, reddish-brown tea from a South African shrub, drunk as an everyday beverage and marketed for its antioxidant content.
Teas & InfusionsOther Traditional SystemsGeneral NutritionRead full entryClose entry
Rooibos Tea
Aspalathus linearis
Part used or form
Fermented, dried leaves and stems steeped in hot water
How it is used
By mouth
Also called
Red bush tea · Redbush tea
Traditional / historical use
- Everyday beverage in South Africa
- Traditionally given to infants for colic and fussiness
Historical use is not evidence that it works.
What has been studied
- Antioxidant content in laboratory studies
Current evidence label
Traditional use — evidence not established
Rooibos contains plant antioxidants studied in laboratory settings, but there is little rigorous human clinical evidence for specific health benefits from drinking the tea.
Safety
Generally safe and naturally caffeine-free, making it a common substitute for caffeinated tea.
Avoid or use caution
- Liver conditions — a small number of case reports mention liver effects with very high intake; use ordinary amounts
Medicine interactions
- None well documented
Children
Rooibos is caffeine-free and is a traditional drink given to fussy infants in some households, but this is a comfort measure, not a treatment for colic, and a persistently fussy infant should be seen by a doctor.
Pregnancy and breastfeeding
Commonly considered an acceptable caffeine-free alternative during pregnancy in ordinary amounts.
How it was traditionally prepared
Leaves and stems fermented, dried in the sun, then steeped in hot water like black tea.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Caffeine — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Immune / general wellness
Rose Hips
Rosa canina
Limited / mixed evidenceThe round fruit left behind after a rose flower fades, long used in European folk medicine as a vitamin-C-rich food and tonic.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningGeneral NutritionPainInflammationRead full entryClose entry
Rose Hips
Rosa canina
Part used or form
Dried fruit (hip), used as tea, powder or extract
How it is used
By mouth
Also called
Rosa canina fruit · Dog rose fruit
Traditional / historical use
- General tonic use
- Colds
- Vitamin C source
Historical use is not evidence that it works.
What has been studied
- Osteoarthritis joint pain
- General antioxidant intake
Current evidence label
Limited / mixed evidence
A handful of small trials suggest rose hip powder may modestly ease osteoarthritis joint pain, but the studies are small and not enough to call it proven. Its vitamin C content is well established as nutrition, separate from any medicinal claim.
Safety
Generally well tolerated as a food or tea. Concentrated supplements can occasionally cause mild stomach upset.
Avoid or use caution
- Kidney stone history (high vitamin C intake)
- Bleeding disorders
Medicine interactions
- May add to the effect of blood-thinning medicines in concentrated form
- High vitamin C content could affect certain lab tests
Children
Rose hip tea in small culinary amounts is broadly familiar as food, but concentrated supplements should not be given to a child without asking the child's doctor first.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Culinary tea is generally considered low risk, but concentrated extracts have not been well studied in pregnancy.
How it was traditionally prepared
Traditionally the dried hips were simmered into a tea or made into syrups and jams.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Arthritis — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Musculoskeletal / pain · Immune / general wellness
Related remedies
Rosemary
Salvia rosmarinus (formerly Rosmarinus officinalis)
Limited / mixed evidenceA fragrant Mediterranean culinary herb long associated in European folklore with memory, also rubbed on the scalp and skin as an oil.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningDigestionSkinOtherRead full entryClose entry
Rosemary
Salvia rosmarinus (formerly Rosmarinus officinalis)
Part used or form
Leaf and essential oil
How it is used
By mouth and on the skin
Also called
Rosmarinus
Traditional / historical use
- Memory and mental clarity (folklore)
- Digestive discomfort
- Hair and scalp care
- Muscle aches (as a rub)
Historical use is not evidence that it works.
What has been studied
- Memory and cognition in small trials
- Hair growth (diluted topical oil)
- Antioxidant effects
Current evidence label
Limited / mixed evidence
Culinary rosemary is a source of antioxidant plant compounds. A few small trials have looked at rosemary aroma or extract and memory, and at diluted rosemary oil for hair thinning, with modest and inconsistent results that need larger studies to confirm.
Safety
Rosemary as a food seasoning is safe. Concentrated rosemary essential oil is much stronger and swallowing it, or using too much on skin, has been linked to irritation and, in some reports, seizures at high exposure.
Avoid or use caution
- Seizure disorders (concentrated essential oil)
- Undiluted essential oil on skin
- Swallowing essential oil
Medicine interactions
- May affect blood pressure medicines and diabetes medicines in concentrated amounts
- May add to the effect of blood-thinning medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Culinary amounts in food are considered normal; medicinal amounts and essential oil are generally advised against because of a traditional link to uterine stimulation. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh or dried leaves were used in cooking and infused in oil for scalp and skin rubs; the essential oil was distilled separately and always diluted before use on skin.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Skin · Nervous system / sleep
Related remedies
Saffron
Crocus sativus
Limited / mixed evidenceThe hand-picked, dried stigmas of a crocus flower, one of the most labor-intensive and expensive spices, used across Persian, South Asian and Mediterranean cooking and traditional medicine.
Herbs & BotanicalsTraditional AsianOther Traditional SystemsSerious safety warningStress/AnxietyMenstrual/MenopauseRead full entryClose entry
Saffron
Crocus sativus
Part used or form
Dried flower stigmas
How it is used
By mouth
Also called
Crocus sativus
Traditional / historical use
- Mood and 'melancholy' (traditional Persian medicine)
- Digestive complaints
- Traditionally used around menstruation
Historical use is not evidence that it works.
What has been studied
- Mild to moderate depression symptoms in small trials
- Premenstrual symptoms
- Eye health (macular degeneration, in early research)
Current evidence label
Limited / mixed evidence
A number of small clinical trials, mostly from a few research groups, suggest saffron extract may modestly help mood symptoms and premenstrual discomfort, but the studies are small and short, and saffron supplements are frequently adulterated with cheaper substitutes, which further clouds the evidence.
Safety
Saffron as a culinary spice is safe. Concentrated supplement extracts in amounts well beyond culinary use have been linked to nausea, dizziness and, in very large amounts, more serious toxicity.
Avoid or use caution
- Bipolar disorder (mood-altering effects)
- Taking antidepressant medicines
- Buy from a reputable source given widespread adulteration
Medicine interactions
- May add to the effect of blood pressure medicines
- May interact with antidepressant medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Culinary amounts in food are considered normal; large medicinal amounts have traditionally been avoided in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
The delicate stigmas were hand-harvested, dried, and steeped in warm water, milk or broth to color and flavor food and drink.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary supplements — regulation and safety — U.S. Food and Drug AdministrationU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Reproductive / menstrual / menopause
Related remedies
Sage
Salvia officinalis
Limited / mixed evidenceA grey-green kitchen herb of the Mediterranean, used for sore throats and memory in European tradition.
Foods & Kitchen RemediesTraditional European / AmericanSerious safety warningSore ThroatSkinMenstrual/MenopauseMetabolic/Blood SugarRead full entryClose entry
Sage
Salvia officinalis
Part used or form
Leaves — fresh, dried, tea or oil
Also called
Common sage · Garden sage · Salvia
Traditional / historical use
- Sore throat gargles
- Digestive complaints
- Excess sweating
- Cooking herb
Historical use is not evidence that it works.
What has been studied
- Sore throat
- Memory and cognition
- Hot flashes
- Blood sugar
Current evidence label
Limited / mixed evidence
Small studies have looked at sage for sore throat and memory with some positive signals, but the research is preliminary.
Safety
Culinary use is generally safe. Some sage species contain thujone, which in large or long-term amounts — especially as essential oil — can be toxic and has been linked to seizures.
Avoid or use caution
- Never swallow sage essential oil
- Seizure disorders
- Avoid long-term high-dose sage preparations
Medicine interactions
- May affect blood sugar with diabetes medicines
- May add to the effect of sedatives
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children. Never give sage essential oil to a child.
Pregnancy and breastfeeding
Avoid medicinal amounts; food amounts are ordinary. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Leaves were steeped for gargles and teas, dried for cooking, and burned in some cleansing customs.
Sources and further reading
- Sage — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory · Skin · Metabolic · Reproductive / menstrual / menopause
Sage Tea
Salvia officinalis
Limited / mixed evidenceA savory, aromatic leaf steeped into a strong tea, traditionally gargled for sore throat and sipped for menopausal hot flashes — distinct from the sage entry's other forms.
Teas & InfusionsTraditional European / AmericanSerious safety warningSore ThroatMenstrual/MenopauseRead full entryClose entry
Sage Tea
Salvia officinalis
Part used or form
Dried or fresh leaves steeped in hot water, drunk or used as a gargle
How it is used
By mouth
Also called
Sage leaf tea · Sage gargle tea
Traditional / historical use
- Sore throat gargle
- Hot flashes
- Mouth and gum irritation rinse
Historical use is not evidence that it works.
What has been studied
- Menopausal hot flashes and night sweats (mostly with extracts, not tea)
- Sore throat comfort as a gargle
Current evidence label
Limited / mixed evidence
Sage has some study for menopausal symptoms, generally using standardized extracts rather than home-brewed tea, and gargling with sage tea is a long-standing home comfort measure for sore throat with limited direct trial evidence.
Safety
Generally safe as an occasional tea or gargle; sage contains thujone, a compound that is a concern mainly with concentrated extracts or prolonged high intake, not an occasional cup of tea.
Avoid or use caution
- Seizure disorders — avoid concentrated or prolonged high intake
- Pregnancy and breastfeeding — sage tea in quantity is traditionally discouraged
Medicine interactions
- May affect blood sugar
- May add to sedative effects at high intake
Children
A mild sage gargle is a traditional sore-throat comfort measure for older children who can safely gargle and spit; not recommended for young children who may swallow it in quantity or who cannot gargle safely.
Pregnancy and breastfeeding
Culinary use in food is fine; drinking sage tea regularly or in quantity is traditionally discouraged in pregnancy and while breastfeeding, since sage is also linked with reducing milk supply.
How it was traditionally prepared
Fresh or dried leaves steeped in hot water for drinking or for use as a cooled gargle.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Reproductive / menstrual / menopause
Related remedies
Saline Nasal Rinse
Some evidenceRinsing the nose with salt water — an old South Asian yogic practice now widely recommended for congestion and sinus symptoms.
Foods & Kitchen RemediesTraditional AsianTraditional European / AmericanSerious safety warningCough/ColdSkinRead full entryClose entry
Saline Nasal Rinse
Part used or form
Salt-water rinse of the nasal passages
Also called
Neti pot · Nasal irrigation · Salt water nose rinse · Saline spray
Traditional / historical use
- Nasal congestion
- Sinus discomfort
- Allergy symptoms
- Yogic cleansing (jala neti)
Historical use is not evidence that it works.
What has been studied
- Sinus congestion and sinusitis symptoms
- Allergy symptoms
- Cold congestion
Current evidence label
Some evidence
Saline rinsing is a commonly recommended, low-cost measure for nasal and sinus congestion, and studies generally support symptom relief rather than curing infection.
Safety
The water matters more than the salt: tap water is not safe for nasal rinsing because rare but deadly infections have followed. Use distilled, sterile, or previously boiled and cooled water, and clean the device after every use.
Avoid or use caution
- Never use untreated tap water
- Clean and dry the pot or bottle after each rinse
- Stop and see a doctor if rinsing causes pain, bleeding or an earache
- Recent nose or sinus surgery — ask the surgeon first
Children
Saline drops and sprays are common for congested children, but rinsing devices need care and a doctor's guidance for young children.
Pregnancy and breastfeeding
Commonly used and considered low risk.
How it was traditionally prepared
Traditionally poured through the nostrils from a small spouted pot; today also squeeze bottles and pre-mixed sprays.
Sources and further reading
- Is rinsing your sinuses with neti pots safe? — U.S. Food and Drug AdministrationU.S. federal health source
- Sinus infection — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- How to treat the common cold at home — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Related concerns
Body systems: Respiratory · Skin
Saline Wound Cleansing
Some evidenceClean saltwater used to gently rinse dirt and debris from a minor scrape or cut before covering it, following ordinary first-aid guidance.
Topical / SkinTraditional European / AmericanOther Traditional SystemsSkinRead full entryClose entry
Saline Wound Cleansing
Part used or form
Sterile or clean salt-water solution used to rinse minor cuts and scrapes
How it is used
On the skin
Also called
Salt water wound rinse · Normal saline cleaning
Traditional / historical use
- Cleaning minor cuts and scrapes
- Rinsing before bandaging
Historical use is not evidence that it works.
What has been studied
- Minor wound cleaning compared with tap water
Current evidence label
Some evidence
Public health guidance recommends gently cleaning minor wounds with clean water or saline before covering them. This is basic first aid, not a treatment for anything beyond superficial, clean cuts and scrapes.
Safety
Low risk for minor, superficial wounds. This is not guidance for deep, dirty, large, gaping or infected wounds, animal bites, or puncture wounds — those need medical evaluation.
Avoid or use caution
- Deep, large, dirty, gaping or infected wounds need a clinician, not home cleaning alone
- Puncture wounds and animal bites need medical evaluation
- Signs of infection (increasing redness, warmth, pus, fever) need medical care
Medicine interactions
- None
Children
Gentle saline rinsing of a minor scrape is standard first aid for children; anything beyond a minor wound should be seen by a clinician.
Pregnancy and breastfeeding
No special pregnancy concern for this basic first-aid measure.
How it was traditionally prepared
Salt dissolved in clean or boiled-and-cooled water, or a sterile commercial saline product, poured or squirted gently over the wound.
Sources and further reading
- Wounds and injuries — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Related remedies
Salt Water Gargle
Some evidenceGargling warm salt water is one of the oldest and simplest sore-throat comfort measures, and still on public-health self-care lists.
Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianSore ThroatSkinRead full entryClose entry
Salt Water Gargle
Part used or form
Warm salt water, gargled and spat out
Also called
Saline gargle · Warm salt rinse
Traditional / historical use
- Sore throat
- Mouth irritation
- After dental work
Historical use is not evidence that it works.
What has been studied
- Sore throat comfort
Current evidence label
Some evidence
Salt water gargling is recommended as a home comfort measure for sore throat. It eases discomfort; it does not treat strep throat, which needs medical care.
Safety
Very low risk. It should be spat out, not swallowed, especially by people on low-salt diets.
Avoid or use caution
- Do not swallow the water
- Not for children too young to gargle safely
- Severe sore throat with fever, rash, drooling or trouble breathing or swallowing needs urgent care
Medicine interactions
- Swallowing salt water matters on a salt-restricted diet
Children
Only for children old enough to gargle and spit reliably. A child with a severe sore throat needs a doctor.
Pregnancy and breastfeeding
Low risk.
How it was traditionally prepared
A little salt stirred into a cup of warm water, gargled and spat out.
Sources and further reading
- Sore throat — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- How to treat the common cold at home — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Related concerns
Body systems: Respiratory · Skin
Sardines
Some evidenceA small, oily fish typically eaten whole from the can, discussed in nutrition guidance as a source of omega-3 fat, protein and calcium from the edible soft bones, with generally low mercury compared with larger fish.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsTraditional AsianHeart/CirculationGeneral NutritionRead full entryClose entry
Sardines
Part used or form
Small oily fish, usually canned whole with bones, eaten cooked
How it is used
By mouth
Also called
Tinned sardines
Traditional / historical use
- A traditional, affordable protein source in Mediterranean, West African and other coastal cuisines
Historical use is not evidence that it works.
What has been studied
- Omega-3 fatty acid intake and heart health as part of an overall diet pattern
- Calcium intake from edible fish bones
Current evidence label
Some evidence
General nutrition guidance recommends eating fish, particularly oily fish such as sardines, regularly as a source of omega-3 fatty acids linked to heart health, as part of an overall healthy diet pattern rather than as a standalone treatment. Because sardines are small, short-lived fish, they are also one of the lower-mercury fish choices compared with larger predatory species.
Safety
Fish is a common food allergen and reactions can be serious. Canned sardines can be high in sodium depending on preparation. Mercury exposure is a general concern with fish consumption, but sardines are considered one of the lower-mercury choices.
Avoid or use caution
- Known fish allergy — avoid
- Check sodium content of canned/packed varieties, especially for sodium-restricted diets
Children
Well-cooked sardines, mashed or with bones softened as in canned preparations, can be an appropriate fish choice for children without a fish allergy; check that any bones present are soft enough to not pose a choking risk for very young children.
Pregnancy and breastfeeding
Sardines are commonly recommended in pregnancy nutrition guidance as a lower-mercury fish option that still provides omega-3 fat; general guidance on eating a variety of fish and following local advisories still applies.
How it was traditionally prepared
Eaten canned in oil, water or sauce, or grilled, fried or grilled fresh where available.
Sources and further reading
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Mercury — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Food allergy — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Pregnancy and nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Musculoskeletal / pain · Cardiovascular
Related remedies
Sarsaparilla
Smilax officinalis / Smilax spp.
Traditional use — evidence not establishedA tropical vine root historically used in Central and South American traditional medicine and once flavored old-style soft drinks.
Herbs & BotanicalsOther Traditional SystemsTraditional European / AmericanSkinPainOtherRead full entryClose entry
Sarsaparilla
Smilax officinalis / Smilax spp.
Part used or form
Dried root
How it is used
By mouth
Also called
Smilax root
Traditional / historical use
- Skin complaints
- Joint discomfort
- General tonic use
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Human research on sarsaparilla root is very thin. Most of what is written about it is historical and traditional-use description rather than clinical study, so no health claim is established.
Safety
Generally considered low risk in the small amounts once used as flavoring, but supplement-strength extracts have not been well studied for safety.
Avoid or use caution
- Kidney disease (limited safety data)
Medicine interactions
- May affect how the body clears certain medicines, based on limited data
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Safety data in pregnancy is essentially absent.
How it was traditionally prepared
Traditionally the dried root was simmered into a decoction or used to flavor tonics and beverages.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Musculoskeletal / pain
Related remedies
Sauerkraut
Traditional use — evidence not establishedCabbage salted and fermented by its own natural bacteria, a European preservation staple long before refrigeration and, in unpasteurized form, a source of live cultures.
Foods & Kitchen RemediesTraditional European / AmericanDigestionGeneral NutritionRead full entryClose entry
Sauerkraut
Part used or form
Fermented, salted cabbage
How it is used
By mouth
Also called
Fermented cabbage
Traditional / historical use
- A traditional preserved vegetable across Central and Eastern Europe
- A historical shipboard food used to prevent scurvy through its vitamin C content
Historical use is not evidence that it works.
What has been studied
- Gut bacteria composition
- Digestive comfort in small studies
Current evidence label
Traditional use — evidence not established
Unpasteurized sauerkraut carries live fermentation bacteria similar to other fermented vegetables, but there is limited direct clinical research on sauerkraut itself, as distinct from fermented foods generally.
Safety
Traditional sauerkraut is high in sodium from salting, which matters for blood pressure. Many jarred, shelf-stable versions are pasteurized and no longer contain live cultures, so the label matters if the goal is live bacteria. People who are severely immunocompromised (for example, during chemotherapy, after a transplant, or with advanced HIV) should ask their doctor before eating foods with live active cultures, since rare infections from food-borne organisms have been reported in this group.
Avoid or use caution
- High blood pressure or sodium-restricted diet — sauerkraut is high in sodium
- Severely immunocompromised, if choosing unpasteurized, raw sauerkraut — ask a doctor first
Children
Ordinary fermented vegetable food in modest amounts; sodium content is the main consideration.
Pregnancy and breastfeeding
Properly fermented and stored sauerkraut is generally considered a low-risk food; the main personal consideration is sodium intake.
How it was traditionally prepared
Cabbage is shredded, salted, and left to ferment in its own brine for weeks.
Sources and further reading
- Probiotics — what you need to know — NIH NCCIHU.S. federal health source
- High blood pressure — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Sauna and Heat Bathing
Limited / mixed evidenceSitting in a heated room, most associated with Finnish sauna tradition, to sweat and relax; observational studies have looked at possible links to heart and vascular health.
Mind-Body / Non-Drug PracticesTraditional European / AmericanOther Traditional SystemsHigh caution — do not self-treatHeart/CirculationStress/AnxietyRead full entryClose entry
Sauna and Heat Bathing
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Burns and heat-related illness reported, especially with alcohol use or prolonged exposure
Part used or form
Sitting in a heated room or steam bath for a period of time
How it is used
Whole-body practice — heated air or steam exposure
Also called
Sauna bathing · Steam bathing · Sweat lodge (culturally distinct practice)
Traditional / historical use
- Relaxation
- Social and cultural ritual
- Perceived detoxification through sweating
Historical use is not evidence that it works.
What has been studied
- Cardiovascular health markers (observational)
- Relaxation
- Muscle soreness
Current evidence label
Limited / mixed evidence
There is no dedicated NCCIH page on sauna use. Population studies, mostly from Finland, have found associations between frequent sauna use and lower rates of some cardiovascular events, but these are observational and cannot prove sauna bathing causes the benefit; frequent sauna-users may simply be healthier overall. Sweating does not meaningfully 'detoxify' the body of most substances — that is a job for the liver and kidneys.
Safety
Generally safe for healthy adults in moderation. Heat exposure can cause dehydration, dizziness, fainting or dangerous drops in blood pressure, and has caused burns and heat-related illness, especially when combined with alcohol.
Avoid or use caution
- Heart disease, low blood pressure, or pregnancy — ask a doctor before sauna use
- Never combine sauna use with alcohol
- Dehydration, fainting and heat-related illness can occur — exit if lightheaded and rehydrate
- Children and older adults are more vulnerable to overheating
Medicine interactions
- Alcohol markedly increases the risk of fainting, burns and heat illness in a sauna
Children
Children regulate heat less efficiently than adults; keep sessions brief, supervised and at lower temperatures, and ask a pediatrician about any heart or health conditions first.
Pregnancy and breastfeeding
Many clinicians advise avoiding sauna and hot tub use in pregnancy because of overheating risk; ask a midwife or doctor.
Historical and cultural background
Heat bathing is documented across many distinct cultural traditions; these practices carry different spiritual and social meanings and should not be treated as interchangeable.
How it was traditionally prepared
Finnish sauna, Turkish hammam, Russian banya, and Native American and other Indigenous sweat lodge ceremonies each have distinct histories and cultural meanings around heat bathing.
Sources and further reading
- Dehydration — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Fever — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Burns — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Cardiovascular
Related remedies
Savory
Satureja hortensis / Satureja montana
Traditional use — evidence not establishedA peppery Mediterranean herb related to thyme, traditionally paired with beans and used in European folk remedies for digestion.
Herbs & BotanicalsTraditional European / AmericanDigestionRead full entryClose entry
Savory
Satureja hortensis / Satureja montana
Part used or form
Fresh or dried leaf
How it is used
By mouth
Also called
Summer savory · Winter savory
Traditional / historical use
- Digestive discomfort and gas, especially with beans and legumes
- Seasoning for meats, beans and vegetables
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Savory has a traditional reputation, particularly in European cooking, as a digestive aid when cooked with beans, but there is no substantial modern clinical research confirming this.
Safety
Ordinary amounts used to season food are considered safe for most people. Concentrated essential oil is more irritating and is not meant to be swallowed.
Avoid or use caution
- Concentrated essential oil
Children
Fine as an ordinary food seasoning.
Pregnancy and breastfeeding
Ordinary culinary use is common. Concentrated extracts or oils are not advised. Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract.
How it was traditionally prepared
Fresh or dried leaves added to bean dishes, stews and roasted meats.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Saw Palmetto
Serenoa repens
Limited / mixed evidenceThe fruit of a low southeastern U.S. palm, used by Native peoples and now sold widely for prostate symptoms.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningCough/ColdUrinaryRead full entryClose entry
Saw Palmetto
Serenoa repens
Part used or form
Ripe fruit of a fan palm
Also called
Serenoa repens · American dwarf palm
Traditional / historical use
- Urinary and reproductive complaints
- Cough
- General tonic
Historical use is not evidence that it works.
What has been studied
- Enlarged prostate (BPH) symptoms
- Hair loss
- Urinary flow
Current evidence label
Limited / mixed evidence
Larger, better-controlled trials have generally not found saw palmetto better than placebo for enlarged prostate symptoms, despite earlier positive smaller studies.
Safety
Usually mild digestive upset or headache. Rare liver and pancreas problems have been reported.
Avoid or use caution
- Urinary symptoms need a medical check — they can signal other conditions
- Blood-thinner use
- Before surgery
Medicine interactions
- May increase bleeding risk with blood thinners
- May interact with hormonal treatments
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended; may affect hormones. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Dried berries were chewed or made into teas and tinctures.
Sources and further reading
- Saw palmetto — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory · Urinary
Schisandra
Schisandra chinensis
Limited / mixed evidenceA red berry named for combining all five traditional flavors, long used in Chinese herbal medicine as a general tonic.
Herbs & BotanicalsTraditional AsianStress/AnxietyGeneral NutritionOtherRead full entryClose entry
Schisandra
Schisandra chinensis
Part used or form
Dried berry
How it is used
By mouth
Also called
Five-flavor fruit · Wu wei zi
Traditional / historical use
- General tonic use
- Fatigue
- Stress resilience
Historical use is not evidence that it works.
What has been studied
- Liver enzyme levels in early small trials
- Mental performance under stress in small trials
Current evidence label
Limited / mixed evidence
Early, mostly small studies out of Asia have looked at schisandra for liver enzyme markers and stress-related performance, with some suggestive results, but the research base is too thin and inconsistent to draw firm conclusions.
Safety
Short-term use appears reasonably well tolerated in available studies, though data outside of short trials is limited.
Avoid or use caution
- Liver disease
- Taking medicines processed by the liver
Medicine interactions
- May affect how the liver processes certain prescription medicines
- May add to the effect of sedative medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Traditional sources caution against use in pregnancy.
How it was traditionally prepared
Traditionally the dried berries were simmered into a decoction or infused as a tea.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Immune / general wellness
Related remedies
Seaweed and Nori
Limited / mixed evidenceA group of edible marine algae used across East Asian cooking, notable in nutrition guidance as one of the most concentrated natural dietary sources of iodine.
Foods & Kitchen RemediesTraditional AsianMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Seaweed and Nori
Part used or form
Dried or fresh edible seaweed, eaten as sheets (nori), in soup (wakame) or as a broth base (kombu)
How it is used
By mouth
Also called
Nori · Kombu · Wakame · Sea vegetables
Traditional / historical use
- A traditional food and broth ingredient across Japanese, Korean and Chinese cooking for centuries
Historical use is not evidence that it works.
What has been studied
- Iodine intake and thyroid function, since seaweed is an unusually concentrated dietary iodine source
Current evidence label
Limited / mixed evidence
Seaweed is a genuine and often very concentrated dietary source of iodine, an essential nutrient for thyroid hormone production, but iodine content varies enormously between seaweed types and preparations and is not standardized. There is no reliable evidence that eating seaweed treats a thyroid condition, and too much iodine can disrupt thyroid function just as too little can.
Safety
Because iodine content in seaweed is high and unpredictable, regularly eating large amounts, particularly of kombu or other iodine-dense varieties, can lead to iodine excess, which can disrupt thyroid function, especially in people with existing thyroid disease. Occasional nori (used in sushi) generally contains far less iodine than kombu.
Avoid or use caution
- Existing thyroid disease — discuss regular or high seaweed intake with a clinician because of iodine's effect on thyroid function
- Very frequent or large intake of iodine-dense seaweed such as kombu — risk of iodine excess
Children
Occasional seaweed such as nori sheets is an ordinary food for children; regularly eating large amounts of iodine-dense seaweed is not advisable for children without medical guidance because of their smaller body size.
Pregnancy and breastfeeding
Both too little and too much iodine can affect thyroid function during pregnancy, which matters for fetal development; occasional seaweed as part of a varied diet is generally fine, but regularly eating large amounts of iodine-dense seaweed such as kombu is best discussed with a prenatal care provider.
How it was traditionally prepared
Dried into sheets for wrapping rice (nori), simmered for broth (kombu), or added to soups and salads (wakame).
Sources and further reading
- Thyroid diseases — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Minerals — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Pregnancy and nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Senna
Senna alexandrina
Some evidenceA flowering shrub whose leaves and pods are a long-used and pharmacy-shelf stimulant laxative, effective but easy to misuse.
Herbs & BotanicalsOther Traditional SystemsTraditional European / AmericanHigh caution — do not self-treatDigestionRead full entryClose entry
Senna
Senna alexandrina
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Long-term or excessive use can cause dependency-like bowel changes and dangerous electrolyte loss
- Misuse for weight loss is a documented pattern of harm
Part used or form
Dried leaf or pod
How it is used
By mouth
Also called
Senna leaf · Cassia senna
Traditional / historical use
- Occasional constipation
Historical use is not evidence that it works.
What has been studied
- Short-term relief of occasional constipation
- Bowel preparation before colonoscopy
Current evidence label
Some evidence
Senna is one of the better-studied herbal laxatives and is included in over-the-counter products for short-term constipation. Evidence supports short-term use; it is not studied or intended as a long-term or weight-control product.
Safety
Effective as a short-term stimulant laxative, but regular or prolonged use can cause dependency-like effects on bowel function, cramping, and dangerous loss of potassium and other electrolytes. It is sometimes misused for weight loss, which is unsafe.
Avoid or use caution
- Long-term or daily use
- Use for weight loss
- Intestinal blockage or undiagnosed abdominal pain
- Inflammatory bowel disease
Medicine interactions
- Can worsen loss of potassium caused by diuretics or heart medicines
- Low potassium from overuse can increase the risk of irregular heartbeat in people taking heart-rhythm medicines
Children
Only appropriate children's laxative products, if any, should be used, and only under a pediatrician's guidance — never an adult stimulant-laxative product.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Short-term use is sometimes considered by clinicians for pregnancy constipation, but this is a decision for a doctor or midwife, not self-treatment.
How it was traditionally prepared
Traditionally the dried leaf or pod was steeped into a tea; today it is mostly sold as a standardized over-the-counter tablet or syrup.
Sources and further reading
- Constipation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- LiverTox — herbal and dietary supplements section — NIH NIDDK / NCBI BookshelfU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Sesame Seeds
Sesamum indicum
Limited / mixed evidenceOne of the oldest cultivated oilseeds, used across African, Middle Eastern, and Asian cuisines for its seeds, paste (tahini), and oil.
Foods & Kitchen RemediesTraditional AsianTraditional African / African DiasporaOther Traditional SystemsHeart/CirculationGeneral NutritionRead full entryClose entry
Sesame Seeds
Sesamum indicum
Part used or form
Whole or hulled seed — raw, toasted, or ground into paste (tahini) or oil
How it is used
By mouth
Also called
Sesame · Tahini (paste made from sesame)
Traditional / historical use
- A staple oilseed and cooking oil across Africa, the Middle East, and Asia for millennia
- Traditional confections and breads
Historical use is not evidence that it works.
What has been studied
- Blood cholesterol and blood pressure in small trials
Current evidence label
Limited / mixed evidence
Sesame seeds provide unsaturated fat and plant compounds studied in small trials for modest effects on cholesterol and blood pressure, but the evidence base is limited compared with better-studied foods like oats or fatty fish.
Safety
Sesame is recognized as one of the major food allergens, and reactions can be severe, so labeling now calls it out specifically in the US. Whole seeds can be a choking hazard for very young children.
Avoid or use caution
- Sesame allergy — a recognized major allergen that can cause a severe reaction
- Whole seeds are a choking hazard for young children
Children
Tahini or ground sesame is a lower-choking-risk form for young children than whole seeds; sesame allergy should be considered like other major food allergies when introducing new foods.
Pregnancy and breastfeeding
Ordinary food.
How it was traditionally prepared
Toasted and eaten whole, ground into tahini paste, pressed into oil, or made into confections like halva.
Sources and further reading
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- How to lower cholesterol with diet — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Metabolic
Related remedies
Shea Butter
Vitellaria paradoxa
Traditional use — evidence not establishedA thick, natural fat pressed from shea tree nuts, used across West Africa for centuries as a moisturizer for skin and hair and to soothe dry or chapped skin.
Topical / SkinTraditional African / African DiasporaSkinRead full entryClose entry
Shea Butter
Vitellaria paradoxa
Part used or form
Fat pressed from the nut of the shea tree, applied to skin and hair
How it is used
On the skin
Also called
Shea nut butter · Karite butter
Traditional / historical use
- Dry skin and chapped lips
- Moisturizing skin and hair
- Minor skin irritation
- Massage
Historical use is not evidence that it works.
What has been studied
- Skin moisturizing
- Mild skin barrier support
Current evidence label
Traditional use — evidence not established
Shea butter is a rich emollient and functions well as a plain moisturizer, which is well established for skin generally, but there is little rigorous clinical research on shea butter specifically beyond that basic moisturizing role.
Safety
Very low risk for most people applied to intact skin; occasional contact allergy can occur, particularly in people with tree nut allergies.
Avoid or use caution
- Known tree nut allergy — patch-test first
- Stop if a rash develops
Medicine interactions
- None documented
Children
Widely used on infants' and children's skin as a plain moisturizer; watch for any allergic reaction in a child with known nut allergies.
Pregnancy and breastfeeding
Commonly used on the skin during pregnancy as a moisturizer; no specific safety concern for topical use.
Historical and cultural background
Shea butter has been produced and traded across West Africa for many generations, valued both as a everyday skin and hair care staple and as a traded good; documented use does not by itself prove any medical effect beyond ordinary moisturizing.
How it was traditionally prepared
Shea nuts roasted, pounded, boiled and hand-worked to separate the butter, then cooled into solid blocks.
Sources and further reading
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Eczema — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Shepherd's Purse
Capsella bursa-pastoris
Traditional use — evidence not establishedA common roadside weed with heart-shaped seed pods, historically used in European folk medicine, especially around childbirth and bleeding.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningMenstrual/MenopauseOtherRead full entryClose entry
Shepherd's Purse
Capsella bursa-pastoris
Part used or form
Dried aerial parts (leaf and stem)
How it is used
By mouth
Also called
Capsella
Traditional / historical use
- Heavy menstrual bleeding
- Postpartum bleeding (traditional, not self-treatment)
- Minor wound care
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Shepherd's purse has a long folk history around bleeding, but modern clinical research in people is essentially absent, so no effectiveness claim can be made.
Safety
Because of its traditional association with uterine and bleeding effects, it needs particular caution in pregnancy, around bleeding disorders and with blood-thinning or heart medicines.
Avoid or use caution
- Pregnancy
- Bleeding disorders
- Heart conditions
- Use alongside blood thinners
Medicine interactions
- May add to the effect of blood-thinning medicines
- Traditional accounts describe heart and blood pressure effects, so caution is warranted with heart medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy. Its traditional use around labor and postpartum bleeding means it should never be self-administered in pregnancy; any bleeding in pregnancy needs prompt medical evaluation, not a home remedy.
How it was traditionally prepared
Traditionally the fresh or dried aerial parts were steeped as a tea or made into a tincture.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Menstruation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Reproductive / menstrual / menopause
Related remedies
Shiitake Mushroom
Lentinula edodes
Limited / mixed evidenceA widely eaten East Asian culinary mushroom with a long history in Chinese and Japanese cooking and medicine, also studied in extract form.
Foods & Kitchen RemediesTraditional AsianSerious safety warningHeart/CirculationGeneral NutritionRead full entryClose entry
Shiitake Mushroom
Lentinula edodes
Part used or form
Fresh or dried fruiting body, cooked as food; also sold as capsule or powder extracts
How it is used
By mouth
Also called
Lentinula edodes · Lentinan (extract form)
Traditional / historical use
- A staple culinary mushroom across East Asia
- A traditional tonic food in Chinese medicine for general vitality
Historical use is not evidence that it works.
What has been studied
- Cholesterol effects when eaten regularly as part of the diet
- Immune-marker and inflammatory changes from an extracted compound (lentinan) studied alongside cancer treatment in some countries
Current evidence label
Limited / mixed evidence
Eating shiitake as food fits within general healthy-eating patterns and small studies suggest a modest effect on cholesterol. A compound purified from shiitake (lentinan) has been studied as an add-on to chemotherapy in some countries, but this is specialist, prescription-grade research, not evidence that the mushroom or an over-the-counter supplement treats cancer. Some mushrooms and mushroom extracts are marketed with cancer-related claims. No mushroom or mushroom supplement treats, cures or prevents cancer, and none should ever replace or delay a prescribed cancer treatment; anyone with cancer should talk with their oncology team before adding any mushroom supplement.
Safety
As a cooked food, shiitake is safe for most people. Raw or undercooked shiitake has caused a distinctive itchy skin rash ('shiitake dermatitis') in some people, and raw shiitake can also irritate the skin and eyes on contact.
Avoid or use caution
- Eating raw or undercooked shiitake — linked to a flagellate skin rash in some people
- Bleeding disorders or upcoming surgery
Medicine interactions
- May add to the effect of blood thinners
Children
Cooked shiitake is a common food for children in many cultures; raw shiitake and concentrated extract supplements are not recommended for children.
Pregnancy and breastfeeding
Cooked shiitake is an ordinary food in pregnancy; concentrated extract supplements have not been specifically studied for pregnancy safety and are best discussed with a clinician first.
How it was traditionally prepared
Traditionally dried and reconstituted or used fresh in soups, stir-fries and broths across Chinese, Japanese and Korean cooking.
Sources and further reading
- Shiitake Mushroom — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular · Immune / general wellness
Sichuan Pepper
Zanthoxylum piperitum / Zanthoxylum simulans
Traditional use — evidence not establishedA distinctive numbing, citrusy spice from the husks of a shrub in the citrus family, central to Sichuan cooking and traditional Chinese medicine.
Herbs & BotanicalsTraditional AsianDigestionRead full entryClose entry
Sichuan Pepper
Zanthoxylum piperitum / Zanthoxylum simulans
Part used or form
Dried husk of the fruit
How it is used
By mouth
Also called
Szechuan pepper · Sansho pepper · Prickly ash berry
Traditional / historical use
- Digestive discomfort
- Traditional Chinese medicine use for abdominal cold and discomfort
- Seasoning for Sichuan dishes
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Sichuan pepper has a long history in Chinese cuisine and traditional medicine, but there is no substantial modern clinical research confirming a health benefit in humans.
Safety
Ordinary amounts used to season food are considered safe for most people. There is little safety data on concentrated extracts.
Avoid or use caution
- Concentrated extract or supplement forms, which are not well studied
Children
The numbing effect of Sichuan pepper can be an unfamiliar and strong sensation for children; use ordinary culinary amounts and watch how a child tolerates it.
Pregnancy and breastfeeding
Ordinary culinary use is common. Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract. for concentrated extracts.
How it was traditionally prepared
Dried husks toasted and ground, or infused in hot oil, to season stir-fries, braises and spice blends.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Traditional medicine — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Skullcap
Scutellaria lateriflora
Traditional use — evidence not establishedA North American mint-family plant traditionally used as a calming herb, worth distinguishing carefully from unrelated Chinese skullcap (Scutellaria baicalensis).
Herbs & BotanicalsTraditional European / AmericanHigh caution — do not self-treatSleepStress/AnxietyRead full entryClose entry
Skullcap
Scutellaria lateriflora
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Reports of liver injury linked to adulterated skullcap products
Part used or form
Dried aerial parts
How it is used
By mouth
Also called
American skullcap · Scutellaria
Traditional / historical use
- Nervous tension
- Sleeplessness
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Human clinical research on American skullcap is very limited, so its traditional calming reputation has not been confirmed in rigorous studies.
Safety
There have been documented cases where skullcap products were adulterated with germander, a liver-toxic look-alike herb, which caused liver injury. Choosing a reputable product and watching for jaundice or unusual fatigue matters.
Avoid or use caution
- Liver disease
- Use with other sedating medicines or alcohol
Medicine interactions
- May add to the effect of sedative medicines
- May interact with medicines processed by the liver
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Safety in pregnancy has not been established.
How it was traditionally prepared
Traditionally the dried above-ground plant was steeped as a tea or tinctured in alcohol.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- LiverTox — herbal and dietary supplements section — NIH NIDDK / NCBI BookshelfU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep
Related remedies
Sleep-Hygiene Routine
Stronger evidenceA structured set of daily habits around sleep timing, light, caffeine, and wind-down activity, used as a first-line, non-drug approach to poor sleep.
Mind-Body / Non-Drug PracticesTraditional European / AmericanSleepRead full entryClose entry
Sleep-Hygiene Routine
Part used or form
A consistent set of pre-sleep habits: fixed wake time, limiting screens and caffeine late in the day, a cool dark room, and a wind-down routine
How it is used
Whole-body practice
Also called
Good sleep habits · Bedtime routine for better sleep
Traditional / historical use
No documented traditional use recorded here.
Historical use is not evidence that it works.
What has been studied
- Insomnia and sleep quality
- Sleep as part of cognitive behavioral therapy for insomnia (CBT-I)
Current evidence label
Stronger evidence
Sleep-hygiene habits are a well-established, evidence-supported first step for sleep problems, and form part of cognitive behavioral therapy for insomnia (CBT-I), which has strong evidence; hygiene habits alone tend to help less than full CBT-I for persistent insomnia.
Safety
No physical risk. The main pitfall is expecting hygiene changes alone to resolve significant, persistent insomnia, when a structured program or a clinician's help may be needed.
Avoid or use caution
- Persistent insomnia not improving with self-directed changes — consider seeing a clinician about CBT-I or ruling out a sleep disorder
Children
Consistent sleep routines are strongly recommended for children by pediatric sleep guidance, with age-appropriate bedtimes and wind-down activities.
Pregnancy and breastfeeding
Sleep-hygiene habits are safe and often recommended in pregnancy, when sleep is commonly disrupted.
How it was traditionally prepared
Modern sleep-hygiene recommendations grew out of 20th-century sleep medicine research into what daily habits support the body's sleep-wake cycle.
Sources and further reading
- Sleep disorders and complementary health approaches — NIH NCCIHU.S. federal health source
- Healthy sleep — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Sleep disorders — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep
Related remedies
Slippery Elm
Ulmus rubra
Traditional use — evidence not establishedThe inner bark of a North American elm tree, long used by Indigenous peoples and later settlers as a soothing coating for sore throats and upset stomachs.
Herbs & BotanicalsTraditional European / AmericanSore ThroatDigestionCough/ColdRead full entryClose entry
Slippery Elm
Ulmus rubra
Part used or form
Inner bark, ground into a mucilaginous powder
How it is used
By mouth
Also called
Red elm · Ulmus rubra
Traditional / historical use
- Sore throat and cough (as lozenges)
- Upset stomach and heartburn
- Applied to skin wounds and boils historically
Historical use is not evidence that it works.
What has been studied
- Component of some multi-herb bowel-symptom blends
- Throat-coating effect
Current evidence label
Traditional use — evidence not established
Slippery elm's mucilage physically coats and soothes the throat and gut lining, which is the basis for its traditional use, but there is little rigorous clinical trial evidence testing slippery elm on its own against a placebo.
Safety
Slippery elm is generally considered safe as a food-like mucilage and is an ingredient in some licensed throat lozenges.
Avoid or use caution
- Space apart from other oral medicines
Medicine interactions
- May slow absorption of other oral medicines if taken at the same time, so is usually spaced apart
Children
Slippery elm lozenges are sometimes used for older children's sore throats, but check with a doctor first, especially for young children who could choke on a lozenge.
Pregnancy and breastfeeding
Considered low risk as an occasional throat lozenge, but whole-bark preparations have historically raised concern, so Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
The inner bark was traditionally dried and ground into a powder, then mixed with water into a soothing gruel, or chewed and swallowed directly for a sore throat.
Sources and further reading
- Slippery Elm — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Sorghum
Sorghum bicolor
Limited / mixed evidenceA drought-tolerant cereal grain that is a dietary staple in parts of Africa and South Asia, and a naturally gluten-free grain option elsewhere.
Foods & Kitchen RemediesTraditional African / African DiasporaTraditional AsianTraditional European / AmericanDigestionGeneral NutritionRead full entryClose entry
Sorghum
Sorghum bicolor
Part used or form
Whole grain, cooked or milled into flour
How it is used
By mouth
Also called
Milo · Jowar · Guinea corn
Traditional / historical use
- A staple cereal grain in Africa, South Asia and parts of Central America
Historical use is not evidence that it works.
What has been studied
- Fiber intake as part of an overall whole-grain diet
Current evidence label
Limited / mixed evidence
Sorghum is a nutritious whole grain, but dedicated human studies on sorghum specifically are fewer than for more widely studied grains such as wheat and oats.
Safety
Very low risk as food and naturally gluten-free.
Children
A suitable grain alternative for children, including those avoiding gluten; cook until soft.
Pregnancy and breastfeeding
An ordinary, nutritious food during pregnancy; no special restriction described in general nutrition guidance.
How it was traditionally prepared
Cooked as a porridge or side grain, popped like popcorn, or milled into flour for flatbreads and baking.
Sources and further reading
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Celiac disease — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
Soy
Glycine max
Limited / mixed evidenceA staple bean of East Asian cooking — tofu, miso, tempeh, soy milk — also sold as concentrated isoflavone pills.
Foods & Kitchen RemediesTraditional AsianSkinMenstrual/MenopauseHeart/CirculationGeneral NutritionRead full entryClose entry
Soy
Glycine max
Part used or form
Beans and foods made from them; also isoflavone supplements
Also called
Soya · Soybean · Isoflavones · Tofu
Traditional / historical use
- Everyday staple food
- Nutrition and protein
Historical use is not evidence that it works.
What has been studied
- Hot flashes and menopause symptoms
- Cholesterol
- Bone health
- Breast cancer risk
Current evidence label
Limited / mixed evidence
Soy foods are a well-established protein source, and soy may have small effects on cholesterol. Evidence that soy or isoflavone supplements relieve menopause symptoms is mixed.
Safety
Soy foods are safe for most people; soy is also a common food allergen. Concentrated isoflavone supplements are a different question from food and are less well understood.
Avoid or use caution
- Soy allergy
- Thyroid medicine — separate soy from the dose and ask a pharmacist
- Hormone-sensitive cancers — ask an oncologist about supplements, not foods
Medicine interactions
- May reduce absorption of thyroid hormone medicine
- Isoflavones may interact with tamoxifen and hormonal therapies
Children
Soy foods are ordinary food. Concentrated isoflavone supplements are not for children.
Pregnancy and breastfeeding
Soy foods are ordinary food; skip concentrated supplements. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Beans were boiled, fermented into miso, natto and tempeh, or curdled into tofu across East Asia.
Sources and further reading
- Soy — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Skin · Cardiovascular · Reproductive / menstrual / menopause · Immune / general wellness
Spearmint
Mentha spicata
Limited / mixed evidenceA milder, sweeter cousin of peppermint, long used as a culinary herb and folk digestive tea, with early research interest in hormone-related hair and skin concerns.
Herbs & BotanicalsTraditional European / AmericanOther Traditional SystemsDigestionNauseaOtherRead full entryClose entry
Spearmint
Mentha spicata
Part used or form
Dried or fresh leaf, brewed as tea
How it is used
By mouth
Also called
Mentha spicata
Traditional / historical use
- Upset stomach
- Bad breath
- General digestive comfort
Historical use is not evidence that it works.
What has been studied
- Symptoms of excess androgen (such as unwanted facial hair) in small studies
Current evidence label
Limited / mixed evidence
A small number of studies, mostly in women with polycystic ovary syndrome, suggest spearmint tea may modestly lower markers of excess androgen, but the research is limited and not sufficient to call it a treatment.
Safety
Widely used as a culinary tea and generally well tolerated. Concentrated extracts are less well studied.
Avoid or use caution
- Hormone-sensitive conditions (based on early research, discuss with a doctor)
Medicine interactions
- Limited data; theoretical interaction with hormone-related medicines given its studied hormonal effects
Children
Weak spearmint tea is broadly familiar as a culinary drink, but concentrated supplements are not appropriate for children without medical guidance.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Culinary tea is generally considered low risk; concentrated extracts have not been well studied in pregnancy.
How it was traditionally prepared
Traditionally the fresh or dried leaf was steeped as a tea after meals.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Reproductive / menstrual / menopause
Related remedies
Spinach
Spinacia oleracea
Some evidenceA leafy green vegetable rich in vitamin K, folate and plant (non-heme) iron, discussed in nutrition guidance mainly for its nutrient density and its interaction with the blood thinner warfarin.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsHeart/CirculationGeneral NutritionRead full entryClose entry
Spinach
Spinacia oleracea
Part used or form
Leafy green vegetable, raw or cooked
How it is used
By mouth
Traditional / historical use
- An everyday leafy green in many cuisines
- A folk association with iron and strength
Historical use is not evidence that it works.
What has been studied
- Vitamin K, folate and iron intake as part of an overall diet
Current evidence label
Some evidence
Spinach is a well-documented dietary source of vitamin K, folate and non-heme iron. Nutrition guidance treats it as a nutrient-dense vegetable rather than a treatment; its plant iron is less readily absorbed than iron from meat.
Safety
Very low risk as food for most people. Its high, variable vitamin K content is the main safety-relevant point for people on warfarin, since sudden changes in intake can affect anticoagulation control.
Avoid or use caution
- People on warfarin — keep vitamin K–rich vegetable intake fairly consistent rather than changing it suddenly
- A history of calcium oxalate kidney stones — spinach is high in oxalates
Medicine interactions
- People taking the blood thinner warfarin are usually told to keep their vitamin K intake fairly steady rather than avoiding vitamin K–rich foods altogether — a sudden increase or drop can throw off dosing, so this is worth discussing with the prescribing clinician.
Children
An appropriate vegetable for children, typically served cooked and chopped for younger children to make it easier to eat.
Pregnancy and breastfeeding
A nutritious source of folate and iron during pregnancy as part of a balanced diet; no special restriction beyond normal food-safety washing.
How it was traditionally prepared
Eaten raw in salads or cooked by sautéing, steaming or adding to soups and stews.
Sources and further reading
- Vitamin K — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Folic acid — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Iron — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular · Immune / general wellness
Related remedies
Spirulina
Arthrospira platensis
Limited / mixed evidenceA blue-green algae harvested from alkaline lakes, traditionally eaten dried by communities in Mexico and Central Africa, now sold globally as a protein and nutrient supplement.
Foods & Kitchen RemediesOther Traditional SystemsSerious safety warningGeneral NutritionRead full entryClose entry
Spirulina
Arthrospira platensis
Part used or form
Dried algae, as powder or tablets
How it is used
By mouth
Also called
Blue-green algae
Traditional / historical use
- Traditional food source, historically harvested and dried into cakes by Aztec and Kanembu communities
- General nourishment
Historical use is not evidence that it works.
What has been studied
- Nutrient and antioxidant content
- Cholesterol and blood pressure in small studies
- Allergic rhinitis symptoms in small studies
Current evidence label
Limited / mixed evidence
Spirulina is a concentrated source of protein and some nutrients, and small studies have looked at possible effects on cholesterol, blood pressure and allergy symptoms, but the trials are small and not conclusive.
Safety
Spirulina from a reputable source is generally well tolerated. Because it is grown in open water, poorly regulated products have been found contaminated with toxic microcystins or heavy metals, so sourcing matters.
Avoid or use caution
- Autoimmune conditions
- Phenylketonuria (some products are not appropriate)
- Buy only from a reputable, tested source
Medicine interactions
- May stimulate the immune system, which matters for autoimmune conditions or immune-suppressing medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
Historical and cultural background
Spirulina cakes were historically harvested from alkaline lakes and dried as a food by the Aztecs in Mexico and by communities around Lake Chad in Central Africa; its long food history does not by itself establish a medicinal effect.
How it was traditionally prepared
Traditionally skimmed from lake surfaces, dried in the sun into cakes, and eaten as a food; today it is dried into powder or pressed into tablets.
Sources and further reading
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary and herbal supplements — what to know — NIH NCCIHU.S. federal health source
- Dietary supplements — regulation and safety — U.S. Food and Drug AdministrationU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Immune / general wellness
Related remedies
St. John's Wort
Hypericum perforatum
Some evidenceA yellow-flowered European plant with a long history for low mood — and the single most interaction-prone herb in common use.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningStress/AnxietyPainSkinMenstrual/MenopauseRead full entryClose entry
St. John's Wort
Hypericum perforatum
Part used or form
Flowering tops
Also called
Hypericum · Klamath weed · Goatweed
Traditional / historical use
- Low mood and 'nervous' complaints
- Wound salves
- Nerve pain
Historical use is not evidence that it works.
What has been studied
- Depression
- Menopause symptoms
- Somatic symptom disorders
Current evidence label
Some evidence
Several studies suggest St. John's wort may help mild to moderate depression, with less support for severe depression. Its serious interactions with medicines are the deciding practical issue.
Safety
Can cause increased sun sensitivity, dry mouth, dizziness and digestive upset. It speeds up the breakdown of many medicines, which can make them stop working.
Avoid or use caution
- Anyone taking prescription medicine — check with a pharmacist first
- Bipolar disorder
- Never stop a prescribed antidepressant to switch to an herb — talk to the prescriber
- Use sun protection
Medicine interactions
- Can make birth control pills fail
- Reduces the effect of some HIV medicines, transplant medicines (cyclosporine), cancer medicines and warfarin
- With antidepressants can cause dangerous serotonin syndrome
- Affects many medicines processed by the liver
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Flowering tops were steeped in oil for a red wound oil, brewed as tea, or tinctured in European practice.
Sources and further reading
- St. John's wort — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Mixing medications and dietary supplements can endanger your health — U.S. Food and Drug AdministrationU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Skin · Nervous system / sleep · Musculoskeletal / pain · Reproductive / menstrual / menopause
Star Anise
Illicium verum
Traditional use — evidence not establishedA star-shaped spice used across Asian cooking and traditional medicine for digestion, important to distinguish from the toxic Japanese star anise look-alike.
Herbs & BotanicalsTraditional AsianHigh caution — do not self-treatDigestionCough/ColdRead full entryClose entry
Star Anise
Illicium verum
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Historical reports of infant seizures and vomiting linked to toxic look-alike star anise species
Part used or form
Dried star-shaped seed pod
How it is used
By mouth
Also called
Chinese star anise
Traditional / historical use
- Digestive discomfort
- Colic-type complaints
- Cough
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Star anise is best known to modern medicine as the source of shikimic acid used in manufacturing an antiviral medicine, not as a treatment itself; direct clinical evidence for eating it as a remedy is lacking.
Safety
The true Chinese species is generally recognized as safe in food amounts, but poorly regulated or misidentified star anise sold in bulk or as baby/infant teas has been linked, historically, to a toxic look-alike species that can cause seizures and vomiting, especially in infants.
Avoid or use caution
- Infant teas or unregulated bulk star anise (contamination/misidentification risk)
Medicine interactions
- Limited data on medicine interactions at culinary use
Children
Star anise teas marketed for infant colic have been linked to serious reactions from contamination with a toxic look-alike species; they should not be given to infants or young children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Culinary use in cooking is common, but concentrated teas or extracts have not been well studied in pregnancy.
How it was traditionally prepared
Traditionally the dried pods were simmered into teas or used whole in cooking.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Respiratory
Related remedies
Stevia Leaf
Stevia rebaudiana
Some evidenceA South American leaf long used to sweeten food and drink without sugar, now widely sold as a sweetener as well as a traditional plant.
Herbs & BotanicalsOther Traditional SystemsMetabolic/Blood SugarGeneral NutritionRead full entryClose entry
Stevia Leaf
Stevia rebaudiana
Part used or form
Dried leaf or leaf extract
How it is used
By mouth
Also called
Sweetleaf
Traditional / historical use
- Sugar substitute
- General tonic use in its native region
Historical use is not evidence that it works.
What has been studied
- Blood sugar and appetite effects of purified steviol glycoside sweeteners
Current evidence label
Some evidence
Purified stevia sweeteners (steviol glycosides) are well studied as non-nutritive sweeteners and generally considered to not raise blood sugar, which is useful nutrition information rather than a medical treatment claim. Whole-leaf extracts for other traditional uses are far less studied.
Safety
Purified stevia sweeteners are widely used and considered safe within food regulatory limits. Whole-leaf and crude extracts, historically also used as a fertility-related folk remedy in some regions, are less thoroughly studied.
Avoid or use caution
- Use alongside diabetes medicines without medical supervision
Medicine interactions
- Theoretical interaction with diabetes medicines given blood-sugar-related research; monitor if using both
Children
Regulated stevia sweeteners are broadly used in foods; ask a pediatrician before giving concentrated leaf extracts to a child.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Regulated sweetener use is generally considered acceptable; whole-leaf extract safety in pregnancy is not well studied.
How it was traditionally prepared
Traditionally the fresh or dried leaf was chewed or steeped to sweeten beverages.
Sources and further reading
- Diabetes — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Metabolic
Stinging Nettle
Urtica dioica
Limited / mixed evidenceA common wild plant whose fresh leaves sting on contact but become a mild, edible green once cooked or dried, long used in European folk medicine and cooking.
Herbs & BotanicalsTraditional European / AmericanUrinaryInflammationRead full entryClose entry
Stinging Nettle
Urtica dioica
Part used or form
Leaf and root, cooked or dried
How it is used
By mouth and on the skin (historically)
Also called
Nettle · Urtica
Traditional / historical use
- Joint aches (leaf applied to skin, historically, to cause counter-irritation)
- Water retention (folk diuretic)
- Prostate and urinary complaints (root)
- Eaten as a cooked green
Historical use is not evidence that it works.
What has been studied
- Enlarged prostate (benign prostatic hyperplasia) symptoms
- Joint pain
- Hay fever symptoms in small studies
Current evidence label
Limited / mixed evidence
Nettle root has some clinical trial support, often in combination with other treatments, for easing urinary symptoms of an enlarged prostate. Evidence for joint pain and allergy symptoms is weaker and mixed.
Safety
Cooked or dried nettle is well tolerated by most people. Fresh, uncooked leaves cause a stinging skin reaction on contact.
Avoid or use caution
- Handle fresh plant with gloves
- Blood pressure or blood-thinning medicines
Medicine interactions
- May add to the effect of blood pressure medicines and diuretics
- May affect blood sugar and blood-thinning medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Nettle leaf tea is used traditionally, but medicinal-strength extracts have been advised against in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Fresh young leaves were cooked like spinach to remove the sting; dried leaf was steeped as tea and the root simmered into a decoction.
Sources and further reading
- Stinging Nettle — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Skin · Urinary
Related remedies
Strawberries
Fragaria × ananassa
Some evidenceA berry fruit rich in vitamin C and antioxidant plant compounds, commonly grouped with other berries in nutrition guidance.
Foods & Kitchen RemediesTraditional European / AmericanHeart/CirculationGeneral NutritionRead full entryClose entry
Strawberries
Fragaria × ananassa
Part used or form
Whole fresh fruit
How it is used
By mouth
Also called
Strawberry
Traditional / historical use
- Everyday eating
- A traditional summer fruit in preserves and desserts
Historical use is not evidence that it works.
What has been studied
- Vitamin C and antioxidant intake as part of overall diet
Current evidence label
Some evidence
Strawberries are a well-established food source of vitamin C and antioxidant compounds, and berries in general are part of the fruit intake linked in large population studies to better cardiovascular and metabolic health markers, though no single berry has been shown to treat a condition on its own.
Safety
Safe as food for almost everyone. Strawberries are a recognized, if less common, food allergen, particularly causing itching or mild oral symptoms in some people with pollen allergies.
Avoid or use caution
- Known strawberry allergy or oral allergy syndrome linked to certain pollen allergies
Children
Wash well and slice for young children; whole strawberries can be a choking hazard for toddlers depending on size.
Pregnancy and breastfeeding
Ordinary food during pregnancy; wash well to reduce exposure to soil-borne contaminants, as with any fresh berry.
How it was traditionally prepared
Eaten fresh, in preserves, or baked into desserts.
Sources and further reading
- Vitamin C — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Antioxidants — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Immune / general wellness
Related remedies
Stretching and Mobility Practice
Some evidenceDeliberate stretching and joint-mobility movement done as its own short routine, apart from being part of a named system like yoga or tai chi.
Mind-Body / Non-Drug PracticesTraditional European / AmericanOther Traditional SystemsPainRead full entryClose entry
Stretching and Mobility Practice
Part used or form
Structured stretching and joint-mobility movements, distinct from yoga or tai chi as named systems
How it is used
Whole-body practice
Also called
Flexibility exercises · Mobility routine
Traditional / historical use
- Loosening stiff joints and muscles
- Warm-up and cool-down around exercise
- General comfort with aging or sedentary work
Historical use is not evidence that it works.
What has been studied
- Flexibility and range of motion
- Mild chronic low back pain (as part of broader exercise therapy)
Current evidence label
Some evidence
Regular stretching reliably improves flexibility and range of motion, and structured stretching is one component of exercise programs with reasonable evidence for easing mild chronic low back pain, though it is usually studied combined with other exercise rather than alone.
Safety
Low risk for most people when done gently, without bouncing or forcing a stretch into pain.
Avoid or use caution
- Recent muscle or tendon injury
- Joint hypermobility conditions
- Stop if a stretch causes sharp pain rather than mild pulling
Children
Generally low risk for children in a simplified, age-appropriate form, ideally introduced with an adult's guidance.
Pregnancy and breastfeeding
Generally considered safe in pregnancy; check with a prenatal care provider before starting anything new, especially if it involves new physical activity.
How it was traditionally prepared
Structured stretching has long been part of physical training, physical therapy, and everyday exercise warm-up routines.
Sources and further reading
- Back pain — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Exercise and physical fitness — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Pain — complementary approaches — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Musculoskeletal / pain
Related remedies
Sumac
Rhus coriaria
Limited / mixed evidenceA tart, deep-red spice ground from sumac berries, a staple of Middle Eastern cooking and traditional medicine, not to be confused with poisonous sumac species.
Herbs & BotanicalsOther Traditional SystemsSerious safety warningMetabolic/Blood SugarDigestionGeneral NutritionRead full entryClose entry
Sumac
Rhus coriaria
Part used or form
Dried, ground berry
How it is used
By mouth
Also called
Rhus coriaria · Tanner's sumac
Traditional / historical use
- Digestive discomfort
- General tonic use
Historical use is not evidence that it works.
What has been studied
- Blood sugar and cholesterol markers in small trials
Current evidence label
Limited / mixed evidence
A small number of clinical trials, mostly from the Middle East, suggest sumac supplementation may modestly improve blood sugar and lipid markers, but sample sizes are small and results need confirmation.
Safety
Culinary sumac (Rhus coriaria) is widely eaten and considered safe as a spice. It should not be confused with poison sumac, an unrelated toxic plant.
Avoid or use caution
- Use alongside diabetes medicines without medical supervision
Medicine interactions
- Theoretical interaction with diabetes and cholesterol medicines given studied effects
Children
Culinary sumac spice is broadly familiar as food; concentrated supplements are not established for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Culinary use is common; concentrated extracts have not been well studied in pregnancy.
How it was traditionally prepared
Traditionally the dried, tart berries were ground into a spice or steeped for a sour drink.
Sources and further reading
- Diabetes — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Cholesterol — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Poison ivy, oak and sumac — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Sunburn Skin Care (Cooling Measures)
Traditional use — evidence not establishedGeneral, non-drug comfort care for sunburned skin using cool water and plain moisturizers, described here as a practice rather than any single product.
Topical / SkinTraditional European / AmericanSkinPainRead full entryClose entry
Sunburn Skin Care (Cooling Measures)
Part used or form
Cool water compresses, tepid baths, and plain moisturizers applied to sunburned skin
How it is used
On the skin
Also called
Sunburn home care · Cool-compress sunburn care
Traditional / historical use
- Cool compresses and tepid baths for sunburn discomfort
- Plain moisturizer after cooling to reduce dryness and peeling
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Cooling measures and moisturizing are standard first-aid comfort advice for sunburn from health authorities, though they treat comfort and dryness rather than reversing the burn itself, and formal comparative trials of home cooling methods are limited.
Safety
Cool (not ice-cold) compresses and tepid baths are low risk. Ice directly on skin, breaking blisters, and using topical anesthetic sprays with '-caine' ingredients on broken skin are generally discouraged. Signs of a severe burn — large blistered areas, fever, signs of infection, or burns on young children — need medical evaluation rather than home care alone.
Avoid or use caution
- Do not apply ice directly to skin
- Do not break blisters
- Seek medical care for large blistering, fever, signs of infection, or sunburn in an infant
Children
Sunburn in infants and young children should be checked by a doctor; use cool (not cold) compresses and keep the child well hydrated and out of further sun.
Pregnancy and breastfeeding
Cooling measures and plain moisturizer are generally fine in pregnancy; avoid topical products not reviewed with a provider.
How it was traditionally prepared
Cool water compresses and plain moisturizing have long been standard first-aid comfort measures for minor burns, alongside staying out of further sun.
Sources and further reading
- Burns — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Wounds and injuries — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Related remedies
Sunflower Seeds
Helianthus annuus
Traditional use — evidence not establishedThe seed of the sunflower, native to the Americas, eaten as a snack and pressed for cooking oil, and a source of unsaturated fat and vitamin E.
Foods & Kitchen RemediesOther Traditional SystemsTraditional European / AmericanGeneral NutritionRead full entryClose entry
Sunflower Seeds
Helianthus annuus
Part used or form
Hulled seed — roasted, raw, or as butter or oil
How it is used
By mouth
Also called
Sunflower kernels
Traditional / historical use
- A traditional Indigenous American food source
- A common snack food
Historical use is not evidence that it works.
What has been studied
- General nutrient intake (vitamin E, unsaturated fat)
Current evidence label
Traditional use — evidence not established
Sunflower seeds contribute unsaturated fat and vitamin E to the diet, which health agencies consider part of a favorable overall fat and antioxidant intake, but there is no strong clinical trial evidence for the seed itself treating a specific condition.
Safety
Very low risk as food. Seed allergy is less common than tree nut or peanut allergy but can occur. Whole seeds in the shell are a choking hazard, especially for young children.
Avoid or use caution
- Seed allergy, if known
- Shelled or whole seeds are a choking hazard for young children
Children
Hulled sunflower seed kernels, not seeds in the shell, are the safer form for young children.
Pregnancy and breastfeeding
Ordinary food.
How it was traditionally prepared
Roasted in the shell or hulled, eaten as a snack, ground into butter, or pressed into cooking oil.
Sources and further reading
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Antioxidants — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Metabolic · Immune / general wellness
Related remedies
Sweet Almond Oil (Topical)
Prunus dulcis
Limited / mixed evidenceA light, mild plant oil pressed from sweet (not bitter) almonds, long used as a massage and baby-massage oil, and a different use case from eating almonds as a food.
Topical / SkinTraditional European / AmericanOther Traditional SystemsSkinRead full entryClose entry
Sweet Almond Oil (Topical)
Prunus dulcis
Part used or form
Oil pressed from sweet almond kernels, applied to skin as a massage or moisturizing oil
How it is used
On the skin
Also called
Prunus dulcis oil for skin
Traditional / historical use
- Massage oil
- Infant massage in some traditions
- Softening dry skin
Historical use is not evidence that it works.
What has been studied
- Stretch mark prevention (studied and not clearly effective)
- Infant skin barrier (mixed findings; some research raises questions about infant skin barrier effects)
Current evidence label
Limited / mixed evidence
Trials on sweet almond oil for preventing stretch marks have not shown a clear benefit over ordinary moisturizer, and some newer research on oils used for infant massage has raised questions about effects on very young infants' developing skin barrier, so this area is genuinely unsettled rather than simply reassuring.
Safety
Generally well tolerated on adult skin. Nut allergy is the key concern: people with tree-nut allergy can react to almond oil, and caution is advised for infant skin given mixed research.
Avoid or use caution
- Tree-nut allergy
- Very young infants — ask a pediatrician before routine oil massage
- Broken or infected skin
Children
Ask a pediatrician before regular oil massage on an infant's skin; some research has questioned whether certain plant oils affect a newborn's developing skin barrier.
Pregnancy and breastfeeding
Topical use on intact adult skin is generally considered low risk, but has not been shown to prevent stretch marks. Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Sweet almond kernels have traditionally been pressed to yield a light oil used directly on skin or as a carrier for massage.
Sources and further reading
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Related remedies
Sweet Basil
Ocimum basilicum
Traditional use — evidence not establishedThe fresh green herb central to Italian and Southeast Asian cooking, distinct from the related but different herb holy basil (tulsi).
Herbs & BotanicalsTraditional European / AmericanTraditional AsianDigestionGeneral NutritionRead full entryClose entry
Sweet Basil
Ocimum basilicum
Part used or form
Fresh or dried leaf
How it is used
By mouth
Also called
Culinary basil · Genovese basil
Traditional / historical use
- Digestive discomfort
- Culinary seasoning for sauces, salads and soups
- Traditional remedy for mild headache in some folk practice
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Sweet basil is a well-established culinary herb. It is often confused with holy basil (tulsi), which has a separate research history; sweet basil itself has little dedicated clinical research.
Safety
Ordinary amounts used to season food are considered safe for most people. Basil essential oil is more concentrated and is not meant to be swallowed.
Avoid or use caution
- Concentrated essential oil taken by mouth
Medicine interactions
- Essential oil forms may add to the effect of blood-thinning medicines
Children
Fresh or dried basil used in food is a normal seasoning for children's meals.
Pregnancy and breastfeeding
Ordinary culinary use is common. Concentrated extracts or oils are not advised. Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract.
How it was traditionally prepared
Fresh leaves torn into sauces, salads and soups at the end of cooking, or dried for longer storage.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Sweet Potatoes
Ipomoea batatas
Some evidenceA starchy root vegetable and dietary staple across many regions, notable in nutrition guidance for fiber and beta-carotene (vitamin A precursor).
Foods & Kitchen RemediesTraditional African / African DiasporaOther Traditional SystemsTraditional AsianDigestionGeneral NutritionRead full entryClose entry
Sweet Potatoes
Ipomoea batatas
Part used or form
Root vegetable, cooked
How it is used
By mouth
Also called
Yams (U.S. usage)
Traditional / historical use
- A staple food across Africa, the Americas, and Asia
Historical use is not evidence that it works.
What has been studied
- Vitamin A status
- Fiber intake as part of an overall diet
Current evidence label
Some evidence
Sweet potatoes, especially orange-fleshed varieties, are a well-documented dietary source of beta-carotene, which the body converts to vitamin A; nutrition guidance recognizes them as a nutrient-dense starchy vegetable, though eating them does not treat a diagnosed vitamin A deficiency on its own.
Safety
Very low risk as food for most people.
Children
A common early weaning food; mash or cut into small soft pieces for infants and toddlers to reduce choking risk.
Pregnancy and breastfeeding
An ordinary, nutritious food during pregnancy and a helpful source of vitamin A precursor as part of a balanced diet.
How it was traditionally prepared
Baked, boiled, steamed or roasted; skins are edible when well washed.
Sources and further reading
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Toddler nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic · Immune / general wellness
Related remedies
Tai Chi and Qigong
Some evidenceChinese practices of slow, coordinated movement and breathing, practised in parks and courtyards for generations.
Mind-Body / Non-Drug PracticesTraditional AsianStress/AnxietyPainInflammationHeart/CirculationRead full entryClose entry
Tai Chi and Qigong
Part used or form
Slow, flowing movement with breath and attention
Also called
Taiji · Tai chi chuan · Qi gong · Moving meditation
Traditional / historical use
- Health maintenance
- Martial training
- Calm and balance in later life
Historical use is not evidence that it works.
What has been studied
- Balance and falls in older adults
- Knee osteoarthritis
- Fibromyalgia
- Blood pressure
- Wellbeing
Current evidence label
Some evidence
Tai chi has some of the better evidence among mind-body practices for balance and fall prevention in older adults, and for pain in conditions such as knee osteoarthritis and fibromyalgia.
Safety
Very low risk and gentle on the joints; mild muscle soreness is the usual complaint.
Avoid or use caution
- Recent injury, joint replacement or severe osteoporosis — ask a clinician
- Work with a teacher who can adapt movements for you
Children
Safe and sometimes taught in schools.
Pregnancy and breastfeeding
Generally considered safe; ask a midwife about balance work.
How it was traditionally prepared
Developed within Chinese martial and health traditions and traditionally practised outdoors in groups.
Sources and further reading
- Tai chi — what you need to know — NIH NCCIHU.S. federal health source
Related concerns
Body systems: Nervous system / sleep · Musculoskeletal / pain · Cardiovascular
Tamarind
Tamarindus indica
Limited / mixed evidenceA tangy, sticky fruit pulp used across South Asian, Southeast Asian, African and Latin American cooking, and in traditional medicine as a mild digestive aid.
Foods & Kitchen RemediesTraditional AsianTraditional African / African DiasporaOther Traditional SystemsDigestionGeneral NutritionRead full entryClose entry
Tamarind
Tamarindus indica
Part used or form
Fruit pulp
How it is used
By mouth
Also called
Tamarindus indica pulp
Traditional / historical use
- Mild constipation
- Digestive discomfort
- Fever (traditional)
Historical use is not evidence that it works.
What has been studied
- Mild laxative effect
- Cholesterol markers in small studies
Current evidence label
Limited / mixed evidence
Tamarind pulp's fiber and organic acid content give it a plausible, traditionally recognized mild laxative effect, and a few small studies have looked at cholesterol markers, but rigorous clinical evidence remains limited.
Safety
Widely eaten as food and generally considered safe. Very large intakes could add to a laxative effect.
Avoid or use caution
- Very large non-culinary intakes
Medicine interactions
- Limited data suggest possible interaction with aspirin-type medicines at high intake
Children
Tamarind is broadly eaten as food by children in many cultures in ordinary culinary amounts; concentrated extracts are not established for children.
Pregnancy and breastfeeding
Culinary use of tamarind is common in pregnancy in many food cultures; ask a doctor before using concentrated tamarind extracts.
How it was traditionally prepared
Traditionally the ripe pulp was soaked in water to make a drink or sauce, or eaten directly.
Sources and further reading
- Constipation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular
Related remedies
Tarragon
Artemisia dracunculus
Traditional use — evidence not establishedAn anise-flavored French culinary herb in the same plant genus as wormwood and mugwort, used mainly for sauces and traditionally for digestion and appetite.
Herbs & BotanicalsTraditional European / AmericanDigestionRead full entryClose entry
Tarragon
Artemisia dracunculus
Part used or form
Fresh or dried leaf
How it is used
By mouth
Also called
French tarragon
Traditional / historical use
- Digestive discomfort
- Traditional use to stimulate appetite
- Seasoning for sauces, poultry and vinegar
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Tarragon is a well-established French culinary herb with a traditional digestive reputation, but there is no substantial modern clinical research on it specifically.
Safety
Ordinary amounts used to season food are considered safe for most people. As a relative of wormwood, concentrated extracts are not as well studied for safety as the culinary herb.
Avoid or use caution
- Concentrated extract or essential oil forms
- Diabetes medicines with concentrated use
Medicine interactions
- May affect blood sugar
- May add to the effect of blood-thinning medicines in concentrated form
Children
Fine as an ordinary food seasoning.
Pregnancy and breastfeeding
Ordinary culinary use is common; concentrated extracts are not advised, partly because of tarragon's relation to wormwood. Talk with a doctor, midwife or pharmacist before using it as a supplement or concentrated extract.
How it was traditionally prepared
Fresh or dried leaves used in sauces such as béarnaise, with poultry and fish, or steeped in vinegar.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Tart Cherry
Prunus cerasus
Limited / mixed evidenceA sour cherry variety, mostly consumed as juice or concentrate, studied in small trials for sleep and muscle recovery beyond its traditional use as a food.
Foods & Kitchen RemediesTraditional European / AmericanSleepInflammationGeneral NutritionRead full entryClose entry
Tart Cherry
Prunus cerasus
Part used or form
Fruit or juice — fresh, dried, or as concentrate
How it is used
By mouth
Also called
Sour cherry · Montmorency cherry · Tart cherry juice
Traditional / historical use
- A pie and preserve fruit in European and American baking
Historical use is not evidence that it works.
What has been studied
- Sleep quality in small trials
- Exercise-related muscle soreness in small trials
- Gout, in a few small studies
Current evidence label
Limited / mixed evidence
A small number of trials suggest tart cherry juice or concentrate may modestly help sleep quality and reduce muscle soreness after exercise, and a few small studies have looked at gout, but the research base is limited in size and consistency, and tart cherry is not established as a treatment for insomnia or gout.
Safety
Very low risk as food or juice for most people. Juice and concentrate are concentrated sugar and calories compared with the whole fruit, which matters for diabetes and weight management.
Avoid or use caution
- Diabetes — juice and concentrate raise blood sugar faster than the whole fruit
- Weight-management goals — juice is calorie-dense
Children
Whole tart cherries need pitting and cutting for young children because of choking risk; juice is an ordinary food but adds sugar.
Pregnancy and breastfeeding
Ordinary fruit; juice in moderation is fine as part of overall sugar intake.
How it was traditionally prepared
Eaten fresh, dried, baked into pies and preserves, or pressed into juice and concentrate.
Sources and further reading
- Carbohydrates — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Diabetes — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Musculoskeletal / pain
Related remedies
Tea Tree Oil
Melaleuca alternifolia
Limited / mixed evidenceAn Australian oil used by Aboriginal peoples from crushed leaves, now common in skin and hair products.
Oils & AromaticsOther Traditional SystemsSerious safety warningCough/ColdSkinRead full entryClose entry
Tea Tree Oil
Melaleuca alternifolia
Part used or form
Essential oil distilled from leaves
Also called
Melaleuca oil · TTO
Traditional / historical use
- Skin infections and wounds
- Coughs and congestion
- Insect bites
Historical use is not evidence that it works.
What has been studied
- Acne
- Athlete's foot and nail fungus
- Dandruff
- Head lice
Current evidence label
Limited / mixed evidence
Small studies suggest topical tea tree oil may help acne and some fungal skin conditions, but the evidence is limited and comparisons with standard treatments are few.
Safety
For skin use only. Swallowing tea tree oil is toxic and has caused confusion, drowsiness and coma. It can also irritate skin, and topical use has been linked to breast tissue growth in some boys.
Avoid or use caution
- Never swallow tea tree oil
- Dilute before applying and patch-test
- Keep bottles out of children's reach — poisonings have occurred
- Not for use in or near the eyes
Medicine interactions
- Few known; may irritate skin alongside other topical treatments
Children
Tea tree oil is poisonous if swallowed and has caused serious poisonings in children. Store it locked away.
Pregnancy and breastfeeding
Skin use in small amounts is generally considered low risk. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Aboriginal Australians crushed the leaves for poultices and inhalations; steam-distilled oil is modern.
Sources and further reading
- Tea tree oil — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory · Skin
Tea Tree Oil (Topical)
Melaleuca alternifolia
Limited / mixed evidenceA strong-smelling essential oil dabbed on the skin, diluted, for minor acne spots, athlete's foot and minor fungal skin issues.
Oils & AromaticsOther Traditional SystemsTraditional European / AmericanHigh caution — do not self-treatSkinRead full entryClose entry
Tea Tree Oil (Topical)
Melaleuca alternifolia
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Toxic and potentially fatal if swallowed, even in small amounts
Part used or form
Essential oil, diluted and applied to the skin only
How it is used
On the skin
Also called
Melaleuca oil · Tea tree spot treatment
Traditional / historical use
- Minor skin blemishes
- Athlete's foot
- Nail fungus in folk use
Historical use is not evidence that it works.
What has been studied
- Mild to moderate acne
- Athlete's foot
Current evidence label
Limited / mixed evidence
Small studies suggest diluted tea tree oil may help mild acne and athlete's foot symptoms, similar to some conventional treatments in a few trials, but the evidence base overall is limited.
Safety
For skin use only. Never swallowed — tea tree oil is toxic if ingested, even in small amounts.
Avoid or use caution
- Never swallow tea tree oil — it is poisonous if ingested
- Always dilute before applying to skin; undiluted oil can cause irritation or burns
- Patch-test a small area of skin first
- Keep away from eyes, ears and children's faces
Medicine interactions
- None well documented for topical use
Children
Keep all essential oils, including tea tree oil, away from children's reach and away from their faces; accidental swallowing is a poisoning emergency.
Pregnancy and breastfeeding
Topical use in properly diluted form is generally considered lower risk than swallowing, but many clinicians advise caution with essential oils in pregnancy — ask first.
How it was traditionally prepared
Steam-distilled from Melaleuca leaves; historically dabbed on skin in diluted form by Australian Aboriginal communities and later commercialized worldwide.
Sources and further reading
- Tea tree oil — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Acne — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Athlete's foot — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Related remedies
Tempeh
Limited / mixed evidenceAn Indonesian fermented soybean cake made by binding cooked soybeans with a mold culture into a firm block, used as a plant protein in place of meat.
Foods & Kitchen RemediesTraditional AsianDigestionGeneral NutritionRead full entryClose entry
Tempeh
Part used or form
Fermented, pressed whole soybean cake
How it is used
By mouth
Traditional / historical use
- A staple plant protein food in Indonesian cooking for centuries
Historical use is not evidence that it works.
What has been studied
- Plant protein intake and fermented soy foods, studied broadly as part of plant-based eating patterns
Current evidence label
Limited / mixed evidence
Tempeh is a nutrient-dense whole-soybean product providing complete plant protein and fiber, and fits within general guidance favoring plant proteins, but dedicated clinical research on tempeh specifically, as distinct from soy foods generally, is limited.
Safety
Very low risk as food when properly cooked. Contains soy, a common allergen, and should be cooked before eating rather than eaten raw.
Avoid or use caution
- Soy allergy — avoid
- Cook thoroughly before eating; not eaten raw
Children
A suitable plant protein food for children without a soy allergy, cut into soft, manageable pieces and fully cooked.
Pregnancy and breastfeeding
An ordinary, nutritious plant protein food during pregnancy as part of a balanced diet, cooked thoroughly; no special restriction described in general nutrition guidance.
How it was traditionally prepared
Made by fermenting whole cooked soybeans with a mold culture into a firm cake, then sliced and pan-fried, steamed or baked before eating.
Sources and further reading
- Dietary proteins — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Food allergy — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Foodborne illness — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Thunder God Vine
Tripterygium wilfordii
Safety concernA Chinese medicinal vine used for joint disease, and one of the most genuinely dangerous plants in common herbal commerce.
Herbs & BotanicalsTraditional AsianHigh caution — do not self-treatPainInflammationSkinRead full entryClose entry
Thunder God Vine
Tripterygium wilfordii
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
Part used or form
Root — carefully processed
Also called
Lei gong teng · Tripterygium
Traditional / historical use
- Joint pain and swelling
- Skin conditions
Historical use is not evidence that it works.
What has been studied
- Rheumatoid arthritis
- Immune conditions
Current evidence label
Safety concern
Some studies suggest possible benefit in rheumatoid arthritis, but toxicity is a serious limiting factor and the plant is not safe to use casually.
Safety
Extracts made from the wrong part of the plant have been poisonous, and deaths have been reported. Reported effects include severe digestive upset, hair loss, bone loss, infertility risk in men and reduced immune defences.
Avoid or use caution
- Do not use homemade or unregulated thunder god vine preparations
- Anyone planning a pregnancy
- Osteoporosis
- Only ever under a qualified clinician's supervision
Medicine interactions
- Adds to the risk of immune-suppressing medicines
- May affect many medicines
Children
Do not give thunder god vine to children.
Pregnancy and breastfeeding
Do not use in pregnancy or breastfeeding — it can cause serious harm.
How it was traditionally prepared
Traditional practitioners used specially processed root preparations, not the whole plant.
Sources and further reading
- Thunder god vine — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Skin · Musculoskeletal / pain
Thyme Tea
Thymus vulgaris
Limited / mixed evidenceA pungent kitchen-herb tea, traditionally sipped for coughs and used as a gargle for sore throat — thyme extract is also a common ingredient in cough syrups.
Teas & InfusionsTraditional European / AmericanOther Traditional SystemsCough/ColdSore ThroatRead full entryClose entry
Thyme Tea
Thymus vulgaris
Part used or form
Dried or fresh leaves steeped in hot water
How it is used
By mouth
Also called
Thyme leaf tea · Thyme infusion
Traditional / historical use
- Cough and cold comfort
- Sore throat gargle
- Digestive comfort
Historical use is not evidence that it works.
What has been studied
- Cough associated with bronchitis (mainly studied as standardized extract combinations, not home tea)
Current evidence label
Limited / mixed evidence
Thyme extracts, often combined with ivy leaf, have been studied for cough associated with bronchitis with some positive results; the plain home-brewed tea itself has much less direct research behind it.
Safety
Generally safe as an occasional tea; concentrated thyme oil (a different product) is far more potent and is not covered by this entry.
Avoid or use caution
- Known allergy to mint-family plants
- This tea is comfort only — a cough with fever, breathing trouble, or lasting more than a couple of weeks needs medical care
Medicine interactions
- None well documented for tea
Children
A mild thyme tea is a traditional household comfort drink for older children's coughs; it does not replace medical care for a concerning cough, and thyme essential oil is not for children.
Pregnancy and breastfeeding
Culinary use in food is common; drinking concentrated thyme tea regularly in pregnancy should be discussed with a clinician.
How it was traditionally prepared
Fresh or dried sprigs steeped in hot water, often with honey and lemon.
Sources and further reading
- Cough — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Respiratory
Tomatoes and Lycopene Foods
Solanum lycopersicum
Limited / mixed evidenceA fruit native to the Americas, now central to Mediterranean and many other cuisines; cooked and processed tomato products are the richest ordinary food source of the antioxidant lycopene.
Foods & Kitchen RemediesOther Traditional SystemsTraditional European / AmericanHeart/CirculationGeneral NutritionRead full entryClose entry
Tomatoes and Lycopene Foods
Solanum lycopersicum
Part used or form
Fruit, eaten raw or cooked, or as sauce, paste, or juice
How it is used
By mouth
Also called
Tomato · Cooked tomato products · Lycopene-rich foods · Watermelon (also a lycopene source)
Traditional / historical use
- A staple food across Mediterranean, Latin American, and many other cuisines
Historical use is not evidence that it works.
What has been studied
- Antioxidant intake
- Cardiovascular and cancer risk in population studies
Current evidence label
Limited / mixed evidence
Tomatoes and tomato products are a major dietary source of lycopene, an antioxidant studied in population research for possible links to heart health and some cancers. NIH sources note that antioxidant-rich diets are linked to better outcomes in observational studies, which is weaker evidence than a proven treatment effect, and that concentrated lycopene supplements have not clearly reproduced the same associations.
Safety
Very low risk as food for most people. Tomatoes can trigger heartburn or reflux symptoms in people prone to them because of their acidity, and are a recognized, though less common, food allergen.
Avoid or use caution
- Acid reflux or heartburn — tomatoes and tomato sauce are a common personal trigger
- Tomato allergy, if known
Children
Ordinary food for children.
Pregnancy and breastfeeding
Ordinary food.
How it was traditionally prepared
Eaten raw, cooked into sauces and soups, dried, or pressed into paste and juice — cooking increases how much lycopene the body can absorb.
Sources and further reading
- Antioxidants — in depth — NIH NCCIHU.S. federal health source
- Antioxidants — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Heartburn — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular
Related remedies
Traditional Chinese Medicine (as a System)
Traditional use — evidence not establishedA centuries-old East Asian system of health and diagnosis that combines herbal formulas, acupuncture, cupping, qigong and dietary guidance, organized around concepts such as qi, yin-yang and meridians.
Mind-Body / Non-Drug PracticesTraditional AsianHigh caution — do not self-treatOtherRead full entryClose entry
Traditional Chinese Medicine (as a System)
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Some TCM herbal products have been found contaminated or adulterated with undisclosed pharmaceutical drugs or heavy metals
Part used or form
A broader diagnostic and treatment system combining herbal formulas, acupuncture, cupping, qigong and dietary guidance
How it is used
Whole-body practice and system of care, combining multiple therapies
Also called
TCM · Chinese medicine
Traditional / historical use
- Broad diagnosis and treatment of illness within its own theoretical framework
- Preventive health maintenance
Historical use is not evidence that it works.
What has been studied
- Individual components such as acupuncture and specific herbal formulas have been studied; the system as a whole is harder to test using conventional trial methods
Current evidence label
Traditional use — evidence not established
Individual TCM techniques like acupuncture have been studied with mixed-to-moderate results for specific conditions, but TCM's core theoretical framework (qi, meridians, yin-yang balance) has not been validated by modern scientific methods, and the system as a whole is difficult to test as a single package. Respecting TCM as a long-standing medical tradition does not mean its explanatory concepts have been scientifically confirmed.
Safety
Safety varies enormously by component: acupuncture and qigong carry low risk with a trained practitioner, while some TCM herbal formulas have been linked to liver injury, heavy-metal contamination, or unlisted pharmaceutical ingredients, particularly in unregulated products bought outside licensed clinics.
Avoid or use caution
- Unregulated herbal products — contamination and mislabeling have been documented
- Tell every provider, conventional and TCM, about all treatments you are using
- Do not delay diagnosis or treatment of a serious condition in favor of TCM alone
Medicine interactions
- TCM herbal formulas can interact with prescription medicines — tell all providers about everything you take
Children
Use only fully licensed practitioners; herbal components in particular are not well studied for safety in children.
Pregnancy and breastfeeding
Many TCM herbs are traditionally avoided or specially selected in pregnancy; a licensed practitioner should be told immediately, and a physician should stay involved in prenatal care.
Historical and cultural background
One of the world's oldest continuously practiced medical systems; described here respectfully as a documented tradition, not as scientifically validated in the way conventional medicine is validated.
How it was traditionally prepared
TCM's texts and practices span more than two thousand years of Chinese medical history and continue to evolve as both a traditional practice and, in China, an integrated part of the modern healthcare system.
Sources and further reading
- Traditional Chinese medicine — what you need to know — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Immune / general wellness
Related remedies
Tremella Mushroom
Tremella fuciformis
Traditional use — evidence not establishedA pale, gelatinous fungus long used in Chinese cooking and traditional medicine, popular in sweet soups and, more recently, marketed in skincare for its water-holding polysaccharides.
Foods & Kitchen RemediesTraditional AsianSkinGeneral NutritionRead full entryClose entry
Tremella Mushroom
Tremella fuciformis
Part used or form
Dried, translucent frond-like fruiting body, rehydrated for soups, desserts or skincare products
How it is used
By mouth
Also called
Snow fungus · Tremella fuciformis · Silver ear mushroom · White jelly fungus
Traditional / historical use
- A sweet soup or dessert ingredient in Chinese cuisine
- A traditional beauty and lung-nourishing food in Chinese folk practice
Historical use is not evidence that it works.
What has been studied
- Skin hydration effects of its polysaccharide content in laboratory and small cosmetic studies
Current evidence label
Traditional use — evidence not established
Tremella's gel-forming polysaccharides have been studied in the lab and in small cosmetic-science studies for moisture retention, mainly when applied to skin. Claims about eating it for internal health benefits are traditional rather than clinically established.
Safety
Tremella is widely eaten as food and used topically in cosmetics with no major safety signal reported; allergic reaction to any fungus is possible but uncommon.
Avoid or use caution
- Known mushroom allergy
Children
Cooked tremella in soups or desserts is an ordinary food; no medicinal use is advised for children.
Pregnancy and breastfeeding
An ordinary cooked food in pregnancy; topical cosmetic use is not known to pose special risk, but a new skincare product should be patch-tested as usual.
How it was traditionally prepared
Traditionally soaked to rehydrate, then simmered into sweet soups or desserts, sometimes with dried fruit or rock sugar.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Traditional, complementary and integrative medicine — health topic — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Skin
Related remedies
Triphala
Blend of Emblica officinalis, Terminalia bellirica and Terminalia chebula
Limited / mixed evidenceA classic Ayurvedic blend of three dried fruits, used for centuries in South Asia as a gentle digestive tonic and mild laxative.
Herbs & BotanicalsTraditional AsianDigestionRead full entryClose entry
Triphala
Blend of Emblica officinalis, Terminalia bellirica and Terminalia chebula
Part used or form
Dried powdered fruit blend
How it is used
By mouth
Also called
Three fruits · Triphala churna
Traditional / historical use
- Constipation and digestive regularity
- General tonic ('rasayana') use
- Traditionally used as a mouth rinse for gum health
Historical use is not evidence that it works.
What has been studied
- Constipation and bowel regularity in small trials
- Antioxidant effects
- Dental plaque in small studies
Current evidence label
Limited / mixed evidence
Small clinical trials suggest triphala may help with mild constipation and, as a mouth rinse, dental plaque, but the overall body of research is limited and mostly comes from a small number of research groups in India.
Safety
Triphala is generally well tolerated; the most common complaint is loose stools or abdominal cramping, particularly at higher intakes.
Avoid or use caution
- Diarrhea or loose stools
- Space apart from other oral medicines
Medicine interactions
- May add to the effect of laxatives
- May affect absorption of other oral medicines if taken at the same time
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
Historical and cultural background
Triphala is one of the most widely used formulas in classical Ayurvedic texts, described there as a balancing daily tonic; its long traditional use does not by itself prove a medicinal effect.
How it was traditionally prepared
The three dried fruits were traditionally powdered together and taken stirred into warm water.
Sources and further reading
- Triphala — About Herbs — Memorial Sloan Kettering Cancer CenterAcademic medical center
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Turkey Tail Mushroom
Trametes versicolor
Limited / mixed evidenceA common, colorfully banded wood-decay fungus used in East Asian traditional medicine and studied in Japan as a prescription add-on alongside cancer treatment; it is too tough to eat as a table mushroom.
Herbs & BotanicalsTraditional AsianOtherRead full entryClose entry
Turkey Tail Mushroom
Trametes versicolor
Part used or form
Dried, fan-shaped fruiting body, typically taken as a tea, powder or standardized extract (not eaten as a culinary food)
How it is used
By mouth
Also called
Trametes versicolor · Coriolus versicolor · Yun zhi · PSK/PSP extract
Traditional / historical use
- A tonic fungus in Traditional Chinese medicine ('yun zhi')
- Traditional support for general vitality after illness
Historical use is not evidence that it works.
What has been studied
- Immune-marker changes when a purified extract (PSK) is used alongside chemotherapy, mainly in Japanese clinical research
- General immune-marker effects of turkey tail extracts in smaller Western studies
Current evidence label
Limited / mixed evidence
A purified turkey tail extract called PSK is an approved prescription add-on to some chemotherapy regimens in Japan, studied there in real clinical trials — but this is a regulated pharmaceutical-grade extract used alongside, not instead of, standard cancer treatment, and it is not the same thing as an over-the-counter turkey tail supplement. Evidence for general immune or wellness claims from consumer supplements is much thinner. Some mushrooms and mushroom extracts are marketed with cancer-related claims. No mushroom or mushroom supplement treats, cures or prevents cancer, and none should ever replace or delay a prescribed cancer treatment; anyone with cancer should talk with their oncology team before adding any mushroom supplement.
Safety
Turkey tail is generally reported as well tolerated in studies, with occasional digestive upset. It is woody and inedible as a food, so it is only used as tea, powder or extract, and wild specimens must be correctly identified since several look-alike bracket fungi exist.
Avoid or use caution
- People on immune-suppressing medicines after transplant, without medical guidance
- Anyone considering it as a substitute for prescribed cancer treatment — it is not one
Medicine interactions
- Theoretical interaction with immune-suppressing medicines given after organ transplant
Children
Not established as safe or studied in children; should not be given to children outside a clinician's guidance.
Pregnancy and breastfeeding
Not studied for safety in pregnancy or breastfeeding, so it is best avoided in both.
How it was traditionally prepared
Traditionally simmered into a decoction or tea from the dried, tough fruiting bodies; modern products use standardized powder extracts.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Cancer — complementary approaches — NIH NCCIHU.S. federal health source
- Traditional, complementary and integrative medicine — health topic — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Immune / general wellness
Related remedies
Turmeric
Curcuma longa
Limited / mixed evidenceThe bright yellow spice at the heart of South Asian cooking and Ayurvedic practice, now one of the most-sold supplements in the world.
Foods & Kitchen RemediesTraditional AsianTraditional African / African DiasporaSerious safety warningStress/AnxietyDigestionPainInflammationSkinHeart/CirculationRead full entryClose entry
Turmeric
Curcuma longa
Part used or form
Rhizome — fresh, dried, powdered; also curcumin extracts
Also called
Curcumin · Haldi · Indian saffron
Traditional / historical use
- Joint pain and swelling
- Digestion
- Wound and skin pastes
- Cooking and dyeing
Historical use is not evidence that it works.
What has been studied
- Osteoarthritis
- Inflammatory conditions
- Depression
- Skin conditions
Current evidence label
Limited / mixed evidence
Turmeric and curcumin have been studied a great deal, but few conclusions are firm. Curcumin is also poorly absorbed, which complicates the research.
Safety
Turmeric as a spice is generally safe. High-dose curcumin supplements can cause digestive upset, and liver injury has been reported with some concentrated products, particularly those with added absorption enhancers.
Avoid or use caution
- Gallbladder disease or bile duct blockage
- Liver disease — be careful with high-dose supplements
- Before surgery
- Iron-deficiency anaemia — high doses may reduce iron absorption
Medicine interactions
- May increase bleeding risk with blood thinners
- May affect blood sugar with diabetes medicines
- Black pepper extract (piperine) in supplements can raise levels of other medicines
Children
Turmeric in food is ordinary food; curcumin supplements are not a children's remedy.
Pregnancy and breastfeeding
Food amounts are ordinary; avoid high-dose supplements. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Boiled and dried into powder for cooking, simmered in milk as 'golden milk', and made into pastes for skin and weddings.
Sources and further reading
- Turmeric — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Digestive · Skin · Nervous system / sleep · Musculoskeletal / pain · Cardiovascular
Turmeric Tea
Curcuma longa
Limited / mixed evidenceTurmeric root simmered into a golden, warming drink, often with milk and black pepper — a South Asian household comfort drink, distinct from turmeric supplement capsules.
Teas & InfusionsTraditional AsianOther Traditional SystemsHigh caution — do not self-treatInflammationDigestionRead full entryClose entry
Turmeric Tea
Curcuma longa
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- High-dose turmeric/curcumin supplements have been linked to liver injury in some reported cases
Part used or form
Fresh or dried turmeric root simmered in water or milk
How it is used
By mouth
Also called
Golden milk · Turmeric latte · Haldi doodh
Traditional / historical use
- Comfort drink for colds and sore throat
- Traditional remedy for minor aches
- Everyday spice drink
Historical use is not evidence that it works.
What has been studied
- Inflammation and joint discomfort (mostly studied as curcumin extract capsules, not tea)
Current evidence label
Limited / mixed evidence
Most clinical research on turmeric's active compound, curcumin, uses concentrated, specially formulated extracts because plain turmeric is poorly absorbed; a cup of turmeric tea delivers much less curcumin than these studied doses.
Safety
Generally safe as an occasional beverage. High-dose turmeric/curcumin supplements have been linked to liver injury in some case reports, which does not clearly apply to an occasional home drink but is worth knowing.
Avoid or use caution
- Gallstones or bile duct problems
- Blood thinner use — ask a doctor about regular, concentrated intake
Medicine interactions
- May add to the effect of blood thinners at high intake
- May affect gallbladder conditions
Children
A mild turmeric milk drink is a common household comfort measure in some cultures; it is not a treatment for a sick child, who should be seen by a doctor if unwell.
Pregnancy and breastfeeding
Culinary use as a spice is common; concentrated turmeric or curcumin supplements are generally advised against in pregnancy without medical guidance.
How it was traditionally prepared
Fresh or dried turmeric simmered in milk or water, traditionally with black pepper and honey.
Sources and further reading
- Turmeric — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- LiverTox — herbal and dietary supplements section — NIH NIDDK / NCBI BookshelfU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Musculoskeletal / pain
Related remedies
Uva Ursi
Arctostaphylos uva-ursi
Safety concernA low evergreen shrub whose leaves were used by Indigenous peoples of North America and in European herbal tradition for urinary complaints, with a real, documented safety limit on how long it can be used.
Herbs & BotanicalsTraditional European / AmericanOther Traditional SystemsHigh caution — do not self-treatUrinaryRead full entryClose entry
Uva Ursi
Arctostaphylos uva-ursi
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Long-term or repeated use has been linked to liver injury (documented in the LiverTox reference)
Part used or form
Dried leaf
How it is used
By mouth
Also called
Bearberry · Kinnikinnick
Traditional / historical use
- Urinary tract discomfort
- Traditionally smoked in ceremonial tobacco blends by some Indigenous North American nations
Historical use is not evidence that it works.
What has been studied
- Urinary tract infection symptoms in small, older studies
Current evidence label
Safety concern
Uva ursi leaf contains arbutin, which the body converts into hydroquinone, a compound with antibacterial activity in urine but also documented liver-toxicity concerns. Older small studies looked at symptom relief for urinary complaints, but modern antibiotic treatment is the established approach to a urinary tract infection, and uva ursi is not a substitute for it.
Safety
Long-term or repeated use of uva ursi has been linked to liver injury, and hydroquinone exposure raises broader safety concerns, which is why sources advise against using it for more than a short course or repeatedly over time.
Avoid or use caution
- Liver conditions
- Long-term or repeated use
- Seek medical care for suspected urinary tract infection rather than relying on this alone
Medicine interactions
- May interact with other substances processed by the liver
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended in pregnancy or breastfeeding given its safety concerns. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Leaves were traditionally dried and steeped as a tea or decoction, historically for a limited course rather than ongoing daily use.
Sources and further reading
- LiverTox — herbal and dietary supplements section — NIH NIDDK / NCBI BookshelfU.S. federal health source
- Urinary tract infections — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Urinary
Related remedies
Valerian
Valeriana officinalis
Limited / mixed evidenceA strong-smelling European root used for sleep and nerves since ancient Greece and Rome.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningSleepStress/AnxietyPainMenstrual/MenopauseRead full entryClose entry
Valerian
Valeriana officinalis
Part used or form
Root and rhizome
Also called
Valeriana · Garden heliotrope · All-heal
Traditional / historical use
- Sleep
- Restlessness and anxiety
- Menstrual cramps
Historical use is not evidence that it works.
What has been studied
- Insomnia
- Anxiety
- Menopausal sleep problems
Current evidence label
Limited / mixed evidence
Valerian is widely used for sleep, but trial results are inconsistent and the overall evidence does not clearly show it works better than placebo.
Safety
Usually mild — headache, dizziness, digestive upset, morning grogginess. Long-term safety is not well established, and stopping abruptly after long use may cause withdrawal-like symptoms.
Avoid or use caution
- Do not drive or operate machinery after use
- Do not combine with alcohol
- Before surgery and anaesthesia
Medicine interactions
- Adds to the effect of alcohol, sedatives, sleep medicines and benzodiazepines
- May affect medicines processed by the liver
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
The dried root was steeped as tea, tinctured, or taken as a powder.
Sources and further reading
- Valerian — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Nervous system / sleep · Musculoskeletal / pain · Reproductive / menstrual / menopause
Vanilla
Vanilla planifolia
Traditional use — evidence not establishedThe cured seed pod of a Mesoamerican orchid, one of the world's most widely used flavorings, historically used by Indigenous Mesoamerican peoples before spreading globally.
Foods & Kitchen RemediesOther Traditional SystemsTraditional European / AmericanGeneral NutritionRead full entryClose entry
Vanilla
Vanilla planifolia
Part used or form
Cured seed pod, or extract made from it
How it is used
By mouth
Also called
Vanilla bean · Vanilla extract · Vanilla pod
Traditional / historical use
- Flavoring for foods and drinks
- Historical Mesoamerican use, including as a traditional calming or digestive aid
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Vanilla is overwhelmingly used and studied as a flavoring; there is no substantial modern clinical research supporting it as a treatment for any condition.
Safety
Culinary vanilla extract and vanilla beans are safe as food. Pure vanilla extract contains alcohol, which matters mainly for the amount used in uncooked preparations and for people avoiding alcohol.
Avoid or use caution
- Large amounts of uncooked alcohol-based extract for people avoiding alcohol
Children
Ordinary culinary use, especially in baked or cooked foods where alcohol evaporates, is a normal food use.
Pregnancy and breastfeeding
Ordinary culinary use, particularly in cooked or baked foods, is common.
How it was traditionally prepared
Cured pods scraped for their seeds and used whole or steeped in alcohol to make extract, for baking and flavoring drinks.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Traditional medicine — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Violet Leaf
Viola odorata
Traditional use — evidence not establishedA small, fragrant woodland flower used in European folk medicine as a soothing tea for coughs and mild skin complaints.
Herbs & BotanicalsTraditional European / AmericanCough/ColdSore ThroatSkinRead full entryClose entry
Violet Leaf
Viola odorata
Part used or form
Dried leaf and flower
How it is used
By mouth
Also called
Sweet violet · Viola odorata
Traditional / historical use
- Cough
- Sore throat
- Minor skin irritation (as a wash)
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Sweet violet has a long folk history for coughs and skin complaints, but modern clinical research is essentially absent, so no effectiveness claim can be made.
Safety
Generally considered low risk as a mild tea in the amounts traditionally used, though safety data is thin. Violet root and seeds are more likely to cause stomach upset than the leaf and flower.
Avoid or use caution
- Use of root or seed preparations, which are more likely to irritate the stomach
Medicine interactions
- No well-documented interactions, though supporting research is thin
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Safety in pregnancy has not been studied.
How it was traditionally prepared
Traditionally the fresh or dried leaf and flower were steeped as a tea or infused in syrup.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Walking as a Daily Practice
Stronger evidenceOrdinary walking done regularly and somewhat purposefully — as a routine rather than incidental daily steps — used as a low-cost, low-impact activity for physical and mental health.
Mind-Body / Non-Drug PracticesTraditional European / AmericanOther Traditional SystemsHeart/CirculationMetabolic/Blood SugarStress/AnxietySleepRead full entryClose entry
Walking as a Daily Practice
Part used or form
Regular, structured walking, distinct from general incidental daily movement
How it is used
Whole-body practice
Also called
Brisk walking · Regular walking routine
Traditional / historical use
- Everyday physical activity
- Clearing the mind
- Social walking with others
Historical use is not evidence that it works.
What has been studied
- Cardiovascular health
- Mood and mild depression symptoms
- Blood pressure and blood sugar management
- Sleep quality
Current evidence label
Stronger evidence
Regular walking has some of the strongest, most consistent evidence of any physical activity for supporting heart health, blood pressure, blood sugar control, mood, and general fitness, and is recommended broadly by health authorities as part of overall physical activity guidance.
Safety
Very low risk for most people. Those with heart conditions, joint problems, or balance issues should check with a clinician about a safe pace and terrain before starting a new routine.
Avoid or use caution
- Unstable heart conditions
- Severe joint pain — get cleared before starting a new routine
- Balance or fall risk — consider supervised or assisted walking
Children
Generally low risk for children in a simplified, age-appropriate form, ideally introduced with an adult's guidance.
Pregnancy and breastfeeding
Generally considered safe in pregnancy; check with a prenatal care provider before starting anything new, especially if it involves new physical activity.
How it was traditionally prepared
Walking as deliberate, health-oriented exercise has been promoted by physicians and public health campaigns for well over a century.
Sources and further reading
- Exercise and physical fitness — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Benefits of exercise — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- How much exercise do I need? — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Nervous system / sleep · Musculoskeletal / pain · Cardiovascular · Metabolic
Related remedies
Walnuts
Juglans regia
Some evidenceA tree nut unusual among nuts for its plant-based omega-3 fat content, widely studied alongside other nuts for heart health.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsHeart/CirculationGeneral NutritionRead full entryClose entry
Walnuts
Juglans regia
Part used or form
Whole nut — raw or roasted
How it is used
By mouth
Also called
English walnuts
Traditional / historical use
- Everyday eating and baking across Europe, the Middle East, and Asia for centuries
Historical use is not evidence that it works.
What has been studied
- Blood cholesterol
- Cardiovascular risk markers as part of an overall diet
Current evidence label
Some evidence
Walnuts are one of the better-studied nuts for cholesterol, likely helped by their combination of unsaturated fat and plant omega-3 fat, and health agencies include nuts like walnuts among foods that can help improve cholesterol when they replace less healthy fats in the diet.
Safety
Tree nuts are a common and sometimes serious food allergen. Whole nuts are a choking hazard for young children. Nuts are calorie-dense, which matters for weight management.
Avoid or use caution
- Known tree nut allergy — can cause a severe reaction
- Whole nuts are a choking hazard for young children
- Weight-management goals — nuts are calorie-dense
Children
Whole walnuts are a choking hazard for young children; chopped or ground walnut is safer. Tree nut allergy can be serious — introduce new nut foods with pediatric guidance if there is a family history of food allergy.
Pregnancy and breastfeeding
Ordinary food for most pregnant people without a nut allergy.
How it was traditionally prepared
Eaten raw or roasted, chopped into baked goods and salads, or pressed into oil.
Sources and further reading
- How to lower cholesterol with diet — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Dietary fats — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Metabolic
Warm and Cold Compresses
Some evidenceCold for fresh swelling, warmth for stiffness — the most common non-drug comfort measure there is.
Topical / SkinTraditional European / AmericanTraditional AsianCough/ColdPainInflammationSkinRead full entryClose entry
Warm and Cold Compresses
Part used or form
Cloth-wrapped cold or warm pack applied to the skin
Also called
Ice pack · Hot pack · Cold compress · Heat pad
Traditional / historical use
- Sprains and bruises
- Muscle stiffness
- Headache
- Cramps
Historical use is not evidence that it works.
What has been studied
- Swelling and pain after injury
- Muscle soreness and stiffness
Current evidence label
Some evidence
Cold packs, rest, compression and elevation are standard first-aid advice for fresh sprains and strains; warmth is generally used later for stiffness. This is symptom comfort, not repair.
Safety
Ice and heat can both injure skin if applied directly or left too long. Always wrap the pack and take breaks.
Avoid or use caution
- Never put ice or a heat source directly on bare skin
- Reduced sensation, diabetes or poor circulation — check the skin often
- Severe pain, deformity, numbness or inability to bear weight needs urgent care
Children
Wrap packs in a towel and keep sessions short. Check a child's skin frequently.
Pregnancy and breastfeeding
Low risk; avoid prolonged heat over the abdomen and ask a midwife about hot baths.
How it was traditionally prepared
Cloths wrung out in cold or hot water, snow or ice wrapped in fabric, warmed cloth bags of grain or salt.
Sources and further reading
- Sprains and strains — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Related concerns
Body systems: Respiratory · Skin · Musculoskeletal / pain
Warm Compress
Limited / mixed evidenceA warm, damp cloth held against sore muscles, a stye, or a stiff joint to ease discomfort and encourage circulation.
Topical / SkinTraditional European / AmericanTraditional AsianTraditional African / African DiasporaOther Traditional SystemsPainMenstrual/MenopauseRead full entryClose entry
Warm Compress
Part used or form
Warm, damp cloth held against the skin
How it is used
On the skin
Also called
Hot compress · Warm cloth
Traditional / historical use
- Muscle stiffness
- Menstrual cramps
- Styes and minor eye irritation
- Earache comfort
Historical use is not evidence that it works.
What has been studied
- Muscle pain comfort
- Menstrual cramp comfort
Current evidence label
Limited / mixed evidence
Warmth is a widely recommended comfort measure for muscle tension and cramps; direct research on the compress itself is limited but the practice is considered low-risk and is included in general health guidance.
Safety
Safe when the cloth is comfortably warm, not hot; too-hot compresses can burn skin, especially in young children and people with reduced sensation.
Avoid or use caution
- Test temperature on the inner wrist first
- Do not use on numb skin, over a fresh injury with swelling, or on a suspected infection without medical advice
- Diabetes or reduced skin sensation — check skin often
Medicine interactions
- None
Children
Use lukewarm, not hot, cloths on children and check the skin frequently.
Pregnancy and breastfeeding
Warm compresses are ordinary comfort measures; avoid very hot temperatures on the abdomen.
How it was traditionally prepared
Cloth soaked in warm water and wrung out, sometimes with added herbs, reheated as it cools.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Musculoskeletal / pain
Related remedies
Watercress
Nasturtium officinale
Some evidenceA peppery, nutrient-dense leafy green from the mustard family, eaten as a salad and cooking green and studied mainly as a nutrient-rich vegetable.
Foods & Kitchen RemediesTraditional European / AmericanGeneral NutritionRead full entryClose entry
Watercress
Nasturtium officinale
Part used or form
Fresh leaf, eaten raw or cooked
How it is used
By mouth
Also called
Nasturtium officinale
Traditional / historical use
- General tonic use
- Nutrition support
Historical use is not evidence that it works.
What has been studied
- Antioxidant intake in small human studies
- Nutrient (vitamin K, vitamin C, carotenoid) content
Current evidence label
Some evidence
As a cruciferous leafy green, watercress is well documented as an excellent source of vitamins A, C and K and other nutrients, and small studies have measured antioxidant effects from eating it; this is nutrition evidence, not a treatment claim for any disease.
Safety
Safe as a food for most people. Wild-harvested watercress carries a documented risk of liver fluke parasite contamination if eaten unwashed or from untreated water, so wash it well or source it commercially.
Avoid or use caution
- Warfarin or other vitamin K–sensitive blood thinners
- Wild-harvested, unwashed watercress
Medicine interactions
- High vitamin K content can interact with warfarin and other blood-thinning medicines
Children
Cooked or well-washed watercress is a normal leafy green for children as part of meals.
Pregnancy and breastfeeding
Well-washed or cooked watercress is a normal leafy green in pregnancy; avoid wild-harvested watercress because of contamination risk.
How it was traditionally prepared
Traditionally eaten raw in salads, added to soups, or juiced.
Sources and further reading
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Antioxidants — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Vitamin A — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Cardiovascular · Immune / general wellness
Related remedies
Watermelon
Citrullus lanatus
Limited / mixed evidenceA very high-water-content fruit that contributes to fluid intake and provides the antioxidant lycopene, along with vitamin C and potassium.
Foods & Kitchen RemediesTraditional African / African DiasporaOther Traditional SystemsTraditional European / AmericanGeneral NutritionMetabolic/Blood SugarRead full entryClose entry
Watermelon
Citrullus lanatus
Part used or form
Whole fruit flesh
How it is used
By mouth
Also called
Water melon
Traditional / historical use
- Everyday eating in hot climates
- Traditional use of the rind and seeds in some regional cooking
Historical use is not evidence that it works.
What has been studied
- Hydration contribution from high water content
- Lycopene and antioxidant intake
Current evidence label
Limited / mixed evidence
Watermelon is over 90 percent water and contributes meaningfully to fluid and electrolyte intake alongside drinking water. It also contains lycopene, an antioxidant studied more thoroughly in tomatoes, though direct evidence that eating watermelon itself changes health outcomes is limited.
Safety
Safe as food for almost everyone. Large chunks with rind or seeds can be a choking hazard for young children, and very large amounts can affect blood sugar in people managing diabetes because of its natural sugar content.
Avoid or use caution
- Large servings may raise blood sugar in people managing diabetes, due to its natural sugar content despite low fat and protein
Children
Cut into small, seedless, rind-free pieces for young children; large chunks or ones with rind or seeds are a choking hazard.
Pregnancy and breastfeeding
Ordinary food during pregnancy; a normal source of fluid and vitamin C with no special restriction.
How it was traditionally prepared
Eaten fresh and chilled; rind sometimes pickled or cooked in some regional cuisines.
Sources and further reading
- Antioxidants — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Diabetes — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Metabolic · Urinary
Related remedies
Wheat Bran
Triticum aestivum
Some evidenceThe fiber-concentrated outer layer of the wheat kernel, used mainly to add insoluble fiber to the diet for regularity.
Foods & Kitchen RemediesTraditional European / AmericanDigestionGeneral NutritionRead full entryClose entry
Wheat Bran
Triticum aestivum
Part used or form
The outer bran layer of the wheat kernel, added to cereal or baking
How it is used
By mouth
Also called
Miller's bran
Traditional / historical use
- A traditional home remedy stirred into cereal or baked goods for constipation
Historical use is not evidence that it works.
What has been studied
- Bowel regularity and stool bulk
Current evidence label
Some evidence
MedlinePlus fiber guidance recognizes wheat bran as a good source of insoluble fiber, which adds bulk to stool and can help with regularity, distinct from the soluble fiber more associated with cholesterol effects.
Safety
Very low risk as food when fiber is increased gradually with adequate fluids. Contains wheat and gluten.
Avoid or use caution
- Celiac disease or wheat allergy — avoid
- Increase fiber gradually with adequate fluid to avoid bloating or, rarely, a blockage in someone with an existing narrowed bowel
Medicine interactions
- Very high fiber intake taken close to some oral medicines may reduce how much medicine is absorbed; spacing intake apart is a reasonable precaution
Children
Fiber needs are lower in children than adults; a large amount of added bran is not typically necessary and can blunt appetite for other foods — a pediatrician can advise if constipation is a concern.
Pregnancy and breastfeeding
An ordinary food that can help with the constipation common in pregnancy as part of a balanced diet with adequate fluids.
How it was traditionally prepared
Milled from the wheat kernel's outer layer and stirred into cereal, yogurt or baked goods.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Celiac disease — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Wheat Germ
Triticum aestivum
Limited / mixed evidenceThe vitamin- and mineral-rich embryo portion of the wheat kernel, often added to cereals for extra nutrients rather than for bulk fiber.
Foods & Kitchen RemediesTraditional European / AmericanGeneral NutritionRead full entryClose entry
Wheat Germ
Triticum aestivum
Part used or form
The nutrient-dense embryo of the wheat kernel, added to cereal or baking
How it is used
By mouth
Traditional / historical use
- A nutrient-boosting addition to cereal, yogurt and baking
Historical use is not evidence that it works.
What has been studied
- Vitamin E and B-vitamin intake as part of an overall diet
Current evidence label
Limited / mixed evidence
Wheat germ is a concentrated source of vitamin E, folate and other B vitamins, but there is limited dedicated clinical research on wheat germ itself as opposed to its individual nutrients.
Safety
Very low risk as food. Contains wheat and gluten, and its oil content means it can turn rancid; refrigeration after opening is reasonable.
Avoid or use caution
- Celiac disease or wheat allergy — avoid
- Store refrigerated once opened to prevent rancidity
Children
An ordinary food addition for children without wheat allergy or celiac disease.
Pregnancy and breastfeeding
An ordinary, nutritious food during pregnancy; no special restriction described in general nutrition guidance.
How it was traditionally prepared
Separated during milling and sprinkled onto cereal, yogurt or added to baked goods.
Sources and further reading
- B vitamins — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Celiac disease — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
Wheatgrass
Triticum aestivum (young shoots)
Limited / mixed evidenceThe young green shoots of the wheat plant, juiced or powdered and popularized in health-food circles as a concentrated green supplement.
Foods & Kitchen RemediesTraditional European / AmericanDigestionGeneral NutritionRead full entryClose entry
Wheatgrass
Triticum aestivum (young shoots)
Part used or form
Fresh juice or dried powder from young wheat shoots
How it is used
By mouth
Also called
Wheat grass juice
Traditional / historical use
- General tonic use
- 'Detox' or wellness drink
Historical use is not evidence that it works.
What has been studied
- Ulcerative colitis symptoms in one small clinical trial
- General antioxidant markers
Current evidence label
Limited / mixed evidence
One small clinical trial found wheatgrass juice modestly helped ulcerative colitis symptoms, but it stands largely alone; broader claims about detoxifying the body or curing disease are not supported by evidence.
Safety
Fresh-pressed juice made from wheatgrass grown in contaminated soil or water, or grown in mold-prone trays, has occasionally caused nausea or allergic reactions. People with wheat or grass pollen allergy should be cautious even though gluten protein itself is largely left behind in the grass stage for most people.
Avoid or use caution
- Grass or wheat pollen allergy
- Celiac disease (residual gluten protein has not been fully ruled out and quality varies by source)
- Mold sensitivity
Medicine interactions
- No well-documented drug interactions, though supporting research is thin
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Concentrated juice or powder supplements have not been well studied in pregnancy.
How it was traditionally prepared
Traditionally the young shoots were juiced fresh or dried and powdered.
Sources and further reading
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
White Button Mushroom
Agaricus bisporus
Some evidenceThe common supermarket mushroom sold at three stages of maturity — white button (young), cremini (mid-stage) and portobello (mature) — all the same species, eaten as an everyday vegetable-like food.
Foods & Kitchen RemediesTraditional European / AmericanGeneral NutritionRead full entryClose entry
White Button Mushroom
Agaricus bisporus
Part used or form
Fresh fruiting body at different maturity stages (white button, cremini, portobello), cooked as food
How it is used
By mouth
Also called
Agaricus bisporus · Cremini mushroom · Portobello mushroom · Common mushroom
Traditional / historical use
- A staple cooking mushroom in European and American cuisine at all three maturity stages
Historical use is not evidence that it works.
What has been studied
- A dietary source of vitamin D when exposed to UV light, studied in nutrition research
- Use as a partial meat substitute in general dietary-pattern research
Current evidence label
Some evidence
As a low-calorie, nutrient-containing food, white button mushrooms (including their cremini and portobello forms) fit within general healthy-eating guidance, and UV-exposed mushrooms are a recognized dietary source of vitamin D. They are not studied or marketed as a medicinal supplement the way reishi, chaga or turkey tail are.
Safety
Cooked white button, cremini and portobello mushrooms are safe for most people as an everyday food, with no specific medicinal-use safety concerns.
Avoid or use caution
- Known mushroom allergy
Children
A normal cooked food for children.
Pregnancy and breastfeeding
An ordinary cooked food in pregnancy; no special restriction is described in general nutrition guidance.
How it was traditionally prepared
Sautéed, roasted, grilled or added to sauces and soups; portobello caps are sometimes grilled whole as a meat substitute.
Sources and further reading
- Nutrition — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
- Dietary proteins — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Metabolic
Related remedies
White Mulberry Leaf
Morus alba
Limited / mixed evidenceThe leaf of the silkworm mulberry, brewed as tea in East Asia and now marketed for blood sugar and weight.
Teas & InfusionsTraditional AsianCough/ColdHeart/CirculationMetabolic/Blood SugarRead full entryClose entry
White Mulberry Leaf
Morus alba
Part used or form
Leaf, brewed as tea or taken as extract
Also called
Mulberry leaf · Sang ye · Morus alba
Traditional / historical use
- Colds and cough
- Thirst and blood sugar
- Silkworm feed and tea
Historical use is not evidence that it works.
What has been studied
- Blood sugar after meals
- Cholesterol
- Weight
Current evidence label
Limited / mixed evidence
Small studies suggest mulberry leaf may blunt blood sugar rises after meals, but the research is preliminary and not a basis for treating diabetes.
Safety
Tea is generally well tolerated; digestive upset, bloating and loose stools are reported with extracts.
Avoid or use caution
- Diabetes — monitor blood sugar and talk to the prescriber
- Before surgery
Medicine interactions
- May add to the blood-sugar lowering effect of diabetes medicines
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Young leaves were dried and steeped as tea in China, Japan and Korea.
Sources and further reading
- White mulberry leaf — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Respiratory · Cardiovascular · Metabolic
White Pepper
Piper nigrum
Traditional use — evidence not establishedThe same pepper plant as black pepper, but made from fully ripe berries with the outer skin soaked off, giving a milder, less floral heat used widely in East and Southeast Asian cooking.
Foods & Kitchen RemediesTraditional AsianDigestionRead full entryClose entry
White Pepper
Piper nigrum
Part used or form
Dried ripe peppercorn with the outer skin removed
How it is used
By mouth
Also called
White peppercorn
Traditional / historical use
- Digestive discomfort
- Seasoning where a milder appearance and flavor than black pepper is wanted
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
White pepper shares black pepper's basic chemistry but has not been separately studied; the limited research on pepper's piperine content mostly used black pepper.
Safety
Ordinary amounts used to season food are considered safe for most people.
Avoid or use caution
- Concentrated piperine extracts alongside prescription medicines, without medical advice
Medicine interactions
- May increase blood levels of some medicines via piperine, as with black pepper, in concentrated extract form
Children
Fine as an ordinary food seasoning.
Pregnancy and breastfeeding
Ordinary culinary use is common.
How it was traditionally prepared
Ripe peppercorns soaked to loosen and remove the outer skin, then dried and ground or used whole.
Sources and further reading
- Herbal and dietary supplements — medical encyclopedia — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive
Related remedies
White Tea
Camellia sinensis
Traditional use — evidence not establishedThe same tea plant as green and black tea, but picked as young buds and given the least processing of the three, which gives it a lighter taste and different polyphenol profile.
Teas & InfusionsTraditional AsianGeneral NutritionRead full entryClose entry
White Tea
Camellia sinensis
Part used or form
Young leaf buds, minimally processed and dried
How it is used
By mouth
Also called
Bai cha · Silver needle tea
Traditional / historical use
- General refreshment
- A milder alternative to green or black tea
Historical use is not evidence that it works.
What has been studied
- Antioxidant content of the leaf
Current evidence label
Traditional use — evidence not established
White tea contains polyphenols similar to green tea, but there is far less clinical research specifically on white tea itself; most human-health claims are extrapolated from green tea studies rather than tested directly.
Safety
Considered safe as an everyday beverage for most healthy adults. It contains caffeine, generally less per cup than black or green tea, but the amount varies with brewing.
Avoid or use caution
- Caffeine sensitivity
- Pregnancy (watch total caffeine intake)
- Sleep problems
Medicine interactions
- Caffeine can add to the effect of other caffeinated products and some stimulant medicines
Children
Herbal and specialty teas are not advised as a home remedy for infants and young children. Ask the child's doctor first, and keep any caffeine-containing tea away from young children.
Pregnancy and breastfeeding
Caffeine-containing; keep total caffeine intake modest in pregnancy and check with a provider. Ask a doctor, midwife or pharmacist before regular use during pregnancy or breastfeeding.
How it was traditionally prepared
Young leaf buds have traditionally been steamed or sun-withered and dried with minimal further processing, then steeped in hot water.
Sources and further reading
- Green tea — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Caffeine — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Antioxidants — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Immune / general wellness
Related remedies
Whole-Grain Bread
Some evidenceBread made with flour that retains the whole wheat kernel, recommended in dietary guidance in place of bread made from refined white flour.
Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsDigestionMetabolic/Blood SugarHeart/CirculationGeneral NutritionRead full entryClose entry
Whole-Grain Bread
Part used or form
Bread made from flour that keeps the whole grain (bran, germ, endosperm)
How it is used
By mouth
Also called
Whole wheat bread · Wholemeal bread
Traditional / historical use
- A daily staple food across many cultures
Historical use is not evidence that it works.
What has been studied
- Fiber intake and blood sugar response compared with refined-grain bread
- Heart health as part of an overall diet pattern
Current evidence label
Some evidence
Dietary guidelines consistently recommend replacing refined grains with whole grains such as whole-wheat bread because of their fiber content and more favorable effect on blood sugar and cholesterol as part of the overall diet; bread itself is not a treatment for any condition.
Safety
Very low risk as food for most people without gluten-related conditions. Contains wheat and gluten, a major allergen, and is often a meaningful source of dietary sodium depending on the recipe.
Avoid or use caution
- Celiac disease, wheat allergy or non-celiac gluten sensitivity — avoid wheat-based bread
- Checking sodium content on labels, since bread contributes meaningfully to average sodium intake
Children
An ordinary food for children without wheat allergy or celiac disease; toasted or soft bread reduces choking risk in toddlers compared with crusty or chewy forms.
Pregnancy and breastfeeding
An ordinary, nutritious food during pregnancy for most people; those with celiac disease or wheat allergy should continue to avoid it as usual.
How it was traditionally prepared
Baked from milled whole-grain wheat flour, yeast or sourdough starter, water and salt.
Sources and further reading
- Dietary fiber — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Celiac disease — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Sodium — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Healthy diet — fact sheet — World Health OrganizationInternational government / WHO / EMA
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Cardiovascular · Metabolic
Related remedies
Wild Yam
Dioscorea villosa
Limited / mixed evidenceA twining vine root once used in North American folk medicine and later famous as a lab starting material for making steroid hormones — a chemistry fact that does not mean the plant itself acts like those hormones in the body.
Herbs & BotanicalsTraditional European / AmericanMenstrual/MenopausePainRead full entryClose entry
Wild Yam
Dioscorea villosa
Part used or form
Dried root, used in teas, capsules or topical creams
How it is used
By mouth
Also called
Dioscorea villosa
Traditional / historical use
- Menstrual cramps
- Menopause symptoms
- Joint discomfort
Historical use is not evidence that it works.
What has been studied
- Menopause symptom relief in a small number of trials
Current evidence label
Limited / mixed evidence
Despite its history as a source of diosgenin used industrially to synthesize progesterone and other hormones, the human body cannot convert wild yam root itself into those hormones by eating or applying it, and the small trials of wild yam creams for menopause symptoms have generally not shown a clear benefit over placebo.
Safety
Wild yam root and creams marketed as containing 'natural progesterone' are a common source of consumer confusion; the plant compound is not the same as the hormone. Short-term culinary or traditional tea use appears low risk for most adults.
Avoid or use caution
- Hormone-sensitive conditions
- Relying on wild yam products in place of prescribed hormone therapy
Medicine interactions
- Marketed 'wild yam progesterone' creams may create false confidence that hormone therapy is being replaced; discuss any hormone-related plan with a doctor
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally the dried root was simmered into a decoction; modern products are often marketed as creams.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Menopause — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Musculoskeletal / pain · Reproductive / menstrual / menopause
Related remedies
Wintergreen
Gaultheria procumbens
Safety concernA low woodland shrub whose leaves yield an intensely minty oil that is almost entirely methyl salicylate — the same aspirin-related compound used in muscle-rub liniments. It is never a drink or a food-strength remedy in its essential-oil form.
Oils & AromaticsTraditional European / AmericanHigh caution — do not self-treatPainInflammationRead full entryClose entry
Wintergreen
Gaultheria procumbens
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Swallowing pure wintergreen essential oil can cause fatal salicylate poisoning, even in small amounts
- Never give to or leave within reach of children
Part used or form
Essential oil (methyl salicylate) distilled from leaf, used only on the skin, well diluted
How it is used
On the skin
Also called
Wintergreen oil · Gaultheria procumbens · Oil of wintergreen
Traditional / historical use
- Muscle and joint aches (as a diluted topical liniment)
Historical use is not evidence that it works.
What has been studied
- Topical methyl salicylate for musculoskeletal pain (studied mainly as an ingredient in over-the-counter muscle rubs)
Current evidence label
Safety concern
Diluted methyl salicylate in commercial muscle-rub products has reasonable evidence for easing minor muscle aches when applied to the skin as directed on the product label. Undiluted wintergreen essential oil is a different matter and is not a home remedy to prepare or swallow.
Safety
Pure wintergreen essential oil is extremely concentrated methyl salicylate and is one of the most dangerous essential oils if swallowed: even a small amount can be fatal, especially for a child, because it acts like a massive aspirin overdose. It should never be swallowed and should never be applied undiluted or over large areas of skin, especially in children.
Avoid or use caution
- Any oral use of the essential oil
- Children (accidental ingestion risk)
- Aspirin allergy
- Use with blood thinners
- Broken or irritated skin
Medicine interactions
- Can add to the effect of blood-thinning medicines (aspirin, warfarin and similar) even through skin absorption in quantity
- Should not be combined with heating pads over treated skin, which increases absorption and risk
Children
Keep wintergreen essential oil locked away from children exactly as a medicine: swallowing even a small amount of the pure oil has caused fatal poisoning in children. Commercial diluted muscle-rub products still need adult supervision and should not be used on infants or young children without a doctor's advice.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding, particularly by mouth or in concentrated form; salicylates in late pregnancy carry known risks. Ask a doctor before any use, including diluted topical products.
How it was traditionally prepared
Historically the leaves were distilled for oil or steeped as a mild tea; commercial products today use synthetic or diluted methyl salicylate in liniments rather than the raw oil.
Sources and further reading
- Poisoning — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Back pain — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- LiverTox — herbal and dietary supplements section — NIH NIDDK / NCBI BookshelfU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin · Musculoskeletal / pain
Related remedies
Witch Hazel (Plant)
Hamamelis virginiana
Limited / mixed evidenceA North American shrub whose astringent bark and leaf were used by Indigenous peoples long before witch hazel water became a common drugstore skin product; this entry covers the plant itself, with the modern topical extract described separately.
Herbs & BotanicalsTraditional African / African DiasporaTraditional European / AmericanSkinRead full entryClose entry
Witch Hazel (Plant)
Hamamelis virginiana
Part used or form
Bark and leaf, distilled or decocted
How it is used
By mouth (historically) and on the skin
Also called
Hamamelis
Traditional / historical use
- Skin irritation, minor cuts and bruises
- Traditionally taken as a tea for diarrhea and sore throat
- Used in steam and poultices for muscle aches
Historical use is not evidence that it works.
What has been studied
- Astringent skin effects
- Minor skin irritation and hemorrhoid symptom relief (of the distilled topical extract)
Current evidence label
Limited / mixed evidence
Witch hazel's tannins give it a genuine astringent effect on skin, which is the basis for its long use, but there are few modern controlled trials, and most confirming evidence concerns the distilled topical water rather than the raw bark or leaf taken by mouth.
Safety
Topical witch hazel water is widely used and considered low risk on unbroken skin. Raw bark or leaf preparations taken by mouth are less standardized and less studied for internal safety.
Avoid or use caution
- Swallowing raw bark/leaf preparations rather than the standardized topical product
- Broken skin or open wounds with the alcohol-containing distilled form, which can sting
Children
Topical witch hazel water is commonly used on children's minor skin irritation, but ask a doctor before using it on broken skin or on an infant.
Pregnancy and breastfeeding
Topical use on unbroken skin is generally considered low risk; oral use of raw plant preparations is generally advised against. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
Historical and cultural background
Witch hazel bark was used medicinally by several Indigenous nations in eastern North America before European settlers adopted and later commercialized it as a distilled skin tonic; this history describes documented use, not proof of effectiveness.
How it was traditionally prepared
Bark and leaf were traditionally boiled into a decoction for compresses, or steamed for poultices; the now-familiar clear witch hazel water is a distilled extract developed later.
Sources and further reading
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Hemorrhoids — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Skin
Related remedies
Witch Hazel (Topical)
Hamamelis virginiana
Limited / mixed evidenceA plant-based astringent liquid dabbed on skin to tighten tissue and reduce minor swelling and itching, and a common ingredient in hemorrhoid pads.
Topical / SkinTraditional African / African DiasporaTraditional European / AmericanSkinRead full entryClose entry
Witch Hazel (Topical)
Hamamelis virginiana
Part used or form
Distilled bark and leaf extract, applied as a liquid or in wipes
How it is used
On the skin
Also called
Witch hazel water · Witch hazel astringent
Traditional / historical use
- Minor skin irritation
- Bruises
- Hemorrhoid discomfort
- Toner for oily skin
Historical use is not evidence that it works.
What has been studied
- Minor skin inflammation
- Hemorrhoid symptom comfort
Current evidence label
Limited / mixed evidence
Witch hazel's tannins have a mild astringent, drying effect on skin, and it is a common over-the-counter ingredient for hemorrhoid discomfort, but rigorous trials are limited.
Safety
Generally low risk applied to intact skin; can be drying or irritating with frequent use.
Avoid or use caution
- Broken skin or open wounds
- Known sensitivity to witch hazel
Medicine interactions
- None well documented for topical use
Children
Commonly used on children's minor bumps and bruises; avoid near eyes and on open skin.
Pregnancy and breastfeeding
Topical use, including on hemorrhoids after childbirth, is commonly recommended; follow product labeling.
How it was traditionally prepared
Bark and leaves steamed or distilled into a liquid extract, dabbed on with cotton.
Sources and further reading
- Hemorrhoids — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Skin
Wormwood
Artemisia absinthium
Safety concernA very bitter European herb historically used in small amounts as a digestive tonic and famous as the flavoring behind the historic spirit absinthe; it carries a documented safety limit because of a compound called thujone.
Herbs & BotanicalsTraditional European / AmericanHigh caution — do not self-treatDigestionOtherRead full entryClose entry
Wormwood
Artemisia absinthium
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Contains thujone, which can cause seizures and nerve damage in excess amounts
- Essential oil is unsafe to take internally
Part used or form
Dried leaf and flower, historically
How it is used
By mouth
Also called
Absinthium · Artemisia absinthium
Traditional / historical use
- Digestive bitters and appetite stimulant
- Traditionally used against intestinal worms
- Flavoring in historic bitters and absinthe
Historical use is not evidence that it works.
What has been studied
- Digestive stimulant effects of bitter compounds
- Very limited modern clinical research on wormwood itself
Current evidence label
Safety concern
Wormwood's traditional use as a digestive bitter is not backed by strong modern clinical trials, and research is far outweighed by long-documented safety concerns about its thujone content.
Safety
Wormwood contains thujone, a compound that is neurotoxic in excess and has been linked to seizures and nerve damage, historically associated with chronic absinthe misuse. Modern wormwood products are regulated to limit thujone content.
Avoid or use caution
- Seizure disorders
- Liver conditions
- Do not take wormwood essential oil internally
Medicine interactions
- May interact with anti-seizure medicines
- May affect the liver in combination with other liver-affecting substances
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not recommended in pregnancy or breastfeeding given its documented toxicity. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Historically the dried herb was steeped briefly as a very bitter tea or infused in wine or spirits; distilled essential oil, used historically to flavor absinthe, is a much more concentrated and hazardous form.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbs at a Glance — full NCCIH catalog — NIH NCCIHU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Nervous system / sleep
Related remedies
Yarrow
Achillea millefolium
Traditional use — evidence not establishedA feathery-leaved wildflower named for the legendary warrior Achilles, long used topically for wounds and by mouth as a bitter digestive tea in European folk medicine.
Herbs & BotanicalsTraditional European / AmericanSerious safety warningDigestionSkinOtherRead full entryClose entry
Yarrow
Achillea millefolium
Part used or form
Dried aerial parts (leaf and flower)
How it is used
By mouth
Also called
Achillea millefolium · Soldier's woundwort
Traditional / historical use
- Minor wound care (traditional)
- Digestive discomfort
- Fever (traditional 'sweating' remedy)
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Yarrow's reputation for wound healing and digestion is old and widespread across European herbal traditions, but rigorous modern clinical trials in people are lacking, so no effectiveness claim can be made.
Safety
Yarrow is a member of the ragweed/daisy family and can trigger allergic skin reactions or, in people with ragweed allergy, more general allergic responses. It has a traditional reputation for encouraging menstrual bleeding, which is a reason for caution in pregnancy.
Avoid or use caution
- Ragweed, daisy or chrysanthemum allergy
- Bleeding disorders
- Use with blood thinners
Medicine interactions
- May add to the effect of blood-thinning or blood-pressure medicines, based on traditional pharmacology
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy. Yarrow has a traditional reputation for stimulating menstrual flow and uterine activity, so it should be avoided. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally the fresh or dried leaf and flower were steeped as a tea, or the crushed fresh leaf was applied to minor cuts.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Skin conditions — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Skin
Related remedies
Yellow Dock
Rumex crispus
Traditional use — evidence not establishedA common weedy dock plant whose root has long been used in European and American folk medicine as a mild laxative and 'blood purifying' tonic.
Herbs & BotanicalsTraditional European / AmericanDigestionSkinRead full entryClose entry
Yellow Dock
Rumex crispus
Part used or form
Dried root
How it is used
By mouth
Also called
Curly dock · Rumex crispus
Traditional / historical use
- Mild constipation
- Skin complaints (traditional 'blood purifier' use)
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Yellow dock root contains natural laxative compounds similar to those in rhubarb and senna, which plausibly supports its traditional use, but there is little modern clinical research confirming benefit or defining safe long-term use.
Safety
Like other anthraquinone-containing roots, it can cause cramping or diarrhea, and the plant's oxalate content means very large amounts could be a concern for kidney stone formers.
Avoid or use caution
- Kidney stone history (oxalate content)
- Long-term or daily use
- Inflammatory bowel disease
Medicine interactions
- May add to the effect of other laxatives or diuretics, causing excess fluid or electrolyte loss
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
How it was traditionally prepared
Traditionally the dried root was simmered into a decoction or tinctured.
Sources and further reading
- Constipation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Links last checked 2026-09-14
Yerba Mate
Ilex paraguariensis
Limited / mixed evidenceA caffeine-containing holly-family leaf brewed as a traditional social drink across Argentina, Uruguay, Paraguay and southern Brazil, often shared from a common gourd and metal straw.
Teas & InfusionsOther Traditional SystemsHigh caution — do not self-treatOtherDigestionRead full entryClose entry
Yerba Mate
Ilex paraguariensis
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
- Drinking beverages very hot, including mate, has been associated in population studies with a higher risk of esophageal cancer
Part used or form
Dried leaf, steeped as an infusion
How it is used
By mouth
Also called
Mate · Ilex paraguariensis
Traditional / historical use
- Everyday social drink shared among family and friends
- Alertness and reducing fatigue
- Digestive complaints
Historical use is not evidence that it works.
What has been studied
- Caffeine and stimulant effects
- Antioxidant content
- Population studies on drinking temperature and esophageal cancer risk
Current evidence label
Limited / mixed evidence
Yerba mate's alertness effect comes mainly from its caffeine content, similar in principle to coffee or tea. Separately, population studies in South America — where mate is often drunk very hot — have looked at a link between drinking very hot beverages in general and a higher rate of esophageal cancer; the concern identified in this research is about beverage temperature, not something unique to the mate plant itself, and applies to any beverage consumed very hot.
Safety
Mate's caffeine can cause the same effects as coffee — jitteriness, faster heart rate, and trouble sleeping — and drinking any beverage, including mate, very hot has been associated with a higher risk of esophageal irritation and, in population studies, esophageal cancer.
Avoid or use caution
- Let mate cool before drinking rather than drinking it scalding hot
- Heart rhythm problems or high blood pressure
- Sleep problems, which caffeine can worsen
Medicine interactions
- Combines with other caffeine sources to raise total caffeine intake
- May add to the effect of stimulant medicines
- May affect blood pressure medicines
Children
Mate's caffeine content makes it inappropriate for young children; ask a doctor first for older children or teens.
Pregnancy and breastfeeding
Contains caffeine, which is generally advised to be limited in pregnancy. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding.
Historical and cultural background
Yerba mate has been cultivated and drunk communally by the Guaraní people and their neighbors in the Río de la Plata region for centuries, and sharing a gourd of mate remains a strong social custom across the region today; this long tradition describes cultural practice, not proof of a health effect.
How it was traditionally prepared
Traditionally the dried, chopped leaf is packed into a hollow gourd, hot (not boiling) water is added, and the infusion is sipped through a metal straw with a filter tip, refilled and passed among a group.
Sources and further reading
- Caffeine — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Cancer — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Nervous system / sleep
Related remedies
Yoga
Some evidenceA South Asian practice combining postures, breath and attention, now one of the most studied movement practices in the world.
Mind-Body / Non-Drug PracticesTraditional AsianSleepStress/AnxietyPainHeart/CirculationRead full entryClose entry
Yoga
Part used or form
Postures, breathing and meditation practice
Also called
Hatha yoga · Asana practice
Traditional / historical use
- Spiritual discipline
- Flexibility and strength
- Calm and focus
Historical use is not evidence that it works.
What has been studied
- Low back pain
- Neck pain
- Stress and anxiety
- Sleep
- Balance
- Blood pressure
Current evidence label
Some evidence
Yoga has reasonable evidence for easing low back and neck pain and for stress and general wellbeing, generally comparable to other forms of exercise and stretching.
Safety
Generally safe when practised sensibly. Injuries happen, usually from pushing into extreme postures; sprains and strains are the most common.
Avoid or use caution
- Glaucoma, uncontrolled high blood pressure, recent surgery, or joint replacement — ask a clinician about which postures to skip
- Pregnancy — some postures need modification
- Do not force a posture into pain
Children
Widely taught to children and generally safe with supervision.
Pregnancy and breastfeeding
Prenatal classes exist; ask a midwife or doctor and avoid deep twists and inversions.
How it was traditionally prepared
Rooted in Indian philosophical and religious tradition long before the modern posture-focused class.
Sources and further reading
- Yoga — what the science says — NIH NCCIHU.S. federal health source
Related concerns
Body systems: Nervous system / sleep · Musculoskeletal / pain · Cardiovascular
Yogurt and Probiotic Foods
Limited / mixed evidenceFermented milk and vegetables carry live microbes and appear in food traditions on every continent.
Foods & Kitchen RemediesTraditional African / African DiasporaTraditional AsianTraditional European / AmericanOther Traditional SystemsDigestionSkinRead full entryClose entry
Yogurt and Probiotic Foods
Part used or form
Fermented foods with live cultures; also supplements
Also called
Probiotics · Live cultures · Kefir · Fermented foods
Traditional / historical use
- Digestion
- Preserving food
- Recovery after illness
Historical use is not evidence that it works.
What has been studied
- Antibiotic-associated diarrhoea
- Infectious diarrhoea
- Irritable bowel syndrome
- Colic
Current evidence label
Limited / mixed evidence
Probiotics have been studied a great deal. Effects depend heavily on the specific strain and condition, and results are inconsistent — 'probiotics' as a category is not one treatment.
Safety
Fermented foods are generally safe for healthy people. Probiotic supplements are riskier for people who are seriously ill or have weak immune systems, where infections have occurred.
Avoid or use caution
- Weakened immune system, serious illness, central lines or recent surgery — ask a doctor first
- Premature babies — only under medical supervision
- Milk allergy or severe lactose intolerance
Medicine interactions
- Timing around antibiotics is often discussed — ask a pharmacist
Children
Yogurt is an ordinary food for children who tolerate dairy. Probiotic supplements for infants need a doctor's advice.
Pregnancy and breastfeeding
Pasteurised yogurt and kefir are ordinary foods; avoid unpasteurised dairy.
How it was traditionally prepared
Milk soured in gourds and clay pots, cabbage salted into sauerkraut and kimchi, grains fermented into sour porridges.
Sources and further reading
- Probiotics — usefulness and safety — NIH NCCIHU.S. federal health source
- Constipation — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Related concerns
Body systems: Digestive · Skin
Yohimbe
Pausinystalia johimbe
Safety concernWest and Central African tree bark used traditionally as an aphrodisiac, and sold today in performance and weight-loss products.
Herbs & BotanicalsTraditional African / African DiasporaHigh caution — do not self-treatMetabolic/Blood SugarRead full entryClose entry
Yohimbe
Pausinystalia johimbe
Do not self-treat with this
Official sources describe serious risks here. Read this entry as background only, and talk to a doctor or pharmacist before going anywhere near it.
Part used or form
Bark of a West African tree
Also called
Yohimbine · Pausinystalia
Traditional / historical use
- Aphrodisiac and ceremonial use
- Fatigue
Historical use is not evidence that it works.
What has been studied
- Erectile dysfunction
- Weight loss
- Athletic performance
Current evidence label
Safety concern
A prescription form of yohimbine has been studied for erectile dysfunction, but bark supplements vary wildly in content and are not a reliable or safe substitute.
Safety
Linked to raised blood pressure, rapid heartbeat, anxiety, and at higher amounts seizures, kidney problems and heart attack. Supplement labels have frequently been found inaccurate.
Avoid or use caution
- High blood pressure, heart or kidney disease
- Anxiety or panic disorder
- Any product combining yohimbe with stimulants
Medicine interactions
- Dangerous with MAOI antidepressants and stimulants
- Interacts with blood-pressure and heart medicines
- May interact with several psychiatric medicines
Children
Do not give yohimbe to children.
Pregnancy and breastfeeding
Do not use in pregnancy or breastfeeding.
How it was traditionally prepared
Bark was traditionally scraped and brewed as a decoction.
Sources and further reading
- Yohimbe — NCCIH fact sheet — NIH NCCIHU.S. federal health source
- Dietary supplements — regulation and safety — U.S. Food and Drug AdministrationU.S. federal health source
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
Related concerns
Body systems: Metabolic
Yucca
Yucca schidigera / Yucca spp.
Traditional use — evidence not establishedA desert plant whose root, rich in soap-like saponins, was used by Indigenous peoples of the Southwestern United States and Mexico both as a traditional remedy and as a cleaning soap.
Herbs & BotanicalsOther Traditional SystemsTraditional European / AmericanPainInflammationDigestionRead full entryClose entry
Yucca
Yucca schidigera / Yucca spp.
Part used or form
Dried root
How it is used
By mouth
Also called
Yucca schidigera · Mojave yucca root
Traditional / historical use
- Joint discomfort
- General tonic use
Historical use is not evidence that it works.
What has been studied
Research has not looked at this in any useful way.
Current evidence label
Traditional use — evidence not established
Yucca root's saponin content has been studied mostly in animal and laboratory settings for anti-inflammatory activity; well-designed human clinical trials for joint pain or other conditions are lacking.
Safety
The saponins that make yucca useful as a soap can also irritate the digestive tract, so nausea or stomach upset is the most common issue reported.
Avoid or use caution
- Sensitive stomach or existing digestive irritation
Medicine interactions
- Limited data; theoretical additive effect with other digestion-irritating herbs
Children
Not a children's remedy. Do not give herbal supplements to a child without asking the child's doctor first. This library never gives amounts for children.
Pregnancy and breastfeeding
Not advised in pregnancy or breastfeeding. Ask a doctor, midwife or pharmacist before use during pregnancy or breastfeeding. Safety data in pregnancy is essentially absent.
How it was traditionally prepared
Traditionally the root was pounded and simmered into a decoction, or worked into a lather for washing.
Sources and further reading
- About Herbs database — search any herb by name — Memorial Sloan Kettering Cancer CenterAcademic medical center
- Herbal medicine — health topic — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
- Arthritis — MedlinePlus — U.S. National Library of MedicineU.S. federal health source
Links last checked 2026-09-14
Related concerns
Body systems: Digestive · Musculoskeletal / pain
Related remedies
Where this information comes from
Every entry is written from public, official health sources — mainly the National Center for Complementary and Integrative Health at the NIH, MedlinePlus, the FDA, the World Health Organization and the European Medicines Agency. Nothing here is our own medical opinion.
- Herbs at a Glance — full NCCIH catalog
NIH NCCIH
- Dietary and herbal supplements — what to know
NIH NCCIH
- Office of Dietary Supplements — fact sheets
NIH Office of Dietary Supplements
- Herbal medicine — health topic
MedlinePlus — U.S. National Library of Medicine
- Dietary supplements — health topic
MedlinePlus — U.S. National Library of Medicine
- Dietary supplements — regulation and safety
U.S. Food and Drug Administration
- Mixing medications and dietary supplements can endanger your health
U.S. Food and Drug Administration
- About Herbs database — search any herb by name
Memorial Sloan Kettering Cancer Center