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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 established

A 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 Nutrition
Read full entry

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

Related concerns

Body systems: Musculoskeletal / pain · Metabolic · Immune / general wellness

Acupressure

Traditional use — evidence not established

The 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 warningSleepNauseaPain
Read full entry

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

Related concerns

Body systems: Digestive · Nervous system / sleep · Musculoskeletal / pain

Acupuncture

Some evidence

A core practice of traditional Chinese medicine, now one of the most-studied complementary therapies in Western clinics.

Mind-Body / Non-Drug PracticesTraditional AsianSerious safety warningNauseaPainInflammation
Read full entry

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

Related concerns

Body systems: Digestive · Musculoskeletal / pain

Agaricus Blazei

Agaricus subrufescens (syn. Agaricus blazei)

Limited / mixed evidence

A 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-treatOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Immune / general wellness

Allspice

Pimenta dioica

Traditional use — evidence not established

A 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Almonds

Prunus dulcis

Some evidence

A 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 Nutrition
Read full entry

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 dietMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Dietary fatsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — 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 evidence

The clear gel squeezed from an aloe leaf, applied directly to minor burns, sunburn and dry skin.

Topical / SkinTraditional African / African DiasporaTraditional AsianOther Traditional SystemsSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin

Related remedies

Aloe Vera

Aloe vera

Limited / mixed evidence

A 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 / AmericanDigestionSkin
Read full entry

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

Related concerns

Body systems: Digestive · Skin

Amla

Phyllanthus emblica

Limited / mixed evidence

A 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 Sugar
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic · Immune / general wellness

Related remedies

Andrographis

Andrographis paniculata

Limited / mixed evidence

A 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 Throat
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Immune / general wellness

Related remedies

Angelica Root

Angelica archangelica

Traditional use — evidence not established

A 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 warningDigestionOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Skin

Related remedies

Anise Seed

Pimpinella anisum

Limited / mixed evidence

A 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/Cold
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Respiratory

Related remedies

Apple Cider Vinegar

Limited / mixed evidence

Vinegar 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 Nutrition
Read full entry

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

  • DiabetesMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • HeartburnMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Tooth disordersMedlinePlus — 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 evidence

A 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular · Metabolic

Related remedies

Apricots

Prunus armeniaca

Limited / mixed evidence

A 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 NutritionOther
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Immune / general wellness

Arnica

Arnica montana

Limited / mixed evidence

A 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-treatPainInflammationSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Musculoskeletal / pain

Related remedies

Aromatherapy

Limited / mixed evidence

Using concentrated plant aromas for mood and comfort — incense, steam, diffusers and diluted massage oils.

Oils & AromaticsTraditional European / AmericanOther Traditional SystemsSerious safety warningSleepStress/AnxietyNauseaPain
Read full entry

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

Related concerns

Body systems: Digestive · Nervous system / sleep · Musculoskeletal / pain

Art Therapy

Limited / mixed evidence

Using 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/AnxietyOther
Read full entry

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

  • AnxietyMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • DepressionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep

Artichoke Leaf

Cynara scolymus

Limited / mixed evidence

The 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 Sugar
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Asafoetida

Ferula assa-foetida

Traditional use — evidence not established

A 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 warningDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Ashwagandha

Withania somnifera

Limited / mixed evidence

A root used in Ayurvedic practice in India, now widely sold as a supplement for stress and sleep.

Herbs & BotanicalsTraditional AsianSerious safety warningSleepStress/Anxiety
Read full entry

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

Related concerns

Body systems: Nervous system / sleep

Asian Ginseng

Panax ginseng

Limited / mixed evidence

One 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 Sugar
Read full entry

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

Related concerns

Body systems: Metabolic

Astragalus

Astragalus membranaceus

Traditional use — evidence not established

A sliced root used in traditional Chinese medicine, usually simmered with other herbs in soups and broths.

Herbs & BotanicalsTraditional AsianSerious safety warningCough/ColdHeart/Circulation
Read full entry

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

Related concerns

Body systems: Respiratory · Cardiovascular

Avocado

Persea americana

Some evidence

A 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 Nutrition
Read full entry

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 fatsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • How to lower cholesterol with dietMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular · Metabolic

Ayurvedic Medicine (as a System)

Traditional use — evidence not established

A 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-treatOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Immune / general wellness

Related remedies

Bacopa (Brahmi)

Bacopa monnieri

Limited / mixed evidence

A creeping wetland herb used in Ayurvedic tradition and commonly called brahmi, taken as a supplement for memory and focus.

Herbs & BotanicalsTraditional AsianStress/AnxietyOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep

Related remedies

Bananas

Musa acuminata / Musa x paradisiaca

Some evidence

A widely eaten fruit notable for its potassium and easily digested carbohydrate content.

Foods & Kitchen RemediesTraditional AsianOther Traditional SystemsTraditional African / African DiasporaDigestionNauseaHeart/CirculationGeneral Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular · Metabolic

Related remedies

Baobab

Adansonia digitata

Traditional use — evidence not established

The 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 Nutrition
Read full entry

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

  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • AntioxidantsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Herbal medicine — health topicMedlinePlus — 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 established

A 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 SystemsDigestionSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Barley

Hordeum vulgare

Some evidence

An 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 Nutrition
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • How to lower cholesterol with dietMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • CarbohydratesMedlinePlus — 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 evidence

A 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 / AmericanSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin

Bay Leaf

Laurus nobilis

Traditional use — evidence not established

The 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 SystemsDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Bee Pollen

Traditional use — evidence not established

Pollen 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Immune / general wellness

Related remedies

Beetroot

Beta vulgaris

Limited / mixed evidence

A 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 Nutrition
Read full entry

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 pressureMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • AntioxidantsMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular

Berberine

Some evidence

A 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 SugarDigestion
Read full entry

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 HerbsMemorial Sloan Kettering Cancer CenterAcademic medical center
  • DiabetesMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • CholesterolMedlinePlus — 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 evidence

A 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 Nutrition
Read full entry

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 depthNIH NCCIHU.S. federal health source
  • AntioxidantsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — 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

Bilberry

Vaccinium myrtillus

Limited / mixed evidence

A small dark berry related to the blueberry, long eaten in northern Europe and later promoted for eyesight.

Herbs & BotanicalsTraditional European / AmericanDigestionSore ThroatHeart/CirculationMetabolic/Blood Sugar
Read full entry

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

Related concerns

Body systems: Digestive · Respiratory · Cardiovascular · Metabolic

Biofeedback

Some evidence

A 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/Circulation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Cardiovascular

Birch Leaf

Betula pendula / Betula pubescens

Traditional use — evidence not established

The 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 / AmericanUrinaryOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Musculoskeletal / pain · Urinary

Related remedies

Bitter Orange

Citrus aurantium

Safety concern

The 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 Sugar
Read full entry

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

Related concerns

Body systems: Digestive · Respiratory · Metabolic

Black Beans

Phaseolus vulgaris

Some evidence

A 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular · Metabolic

Black Cohosh

Actaea racemosa

Limited / mixed evidence

A 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/Menopause
Read full entry

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

Related concerns

Body systems: Respiratory · Nervous system / sleep · Musculoskeletal / pain · Reproductive / menstrual / menopause

Black Pepper

Piper nigrum

Limited / mixed evidence

The 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/Cold
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Respiratory

Related remedies

Black Seed

Nigella sativa

Limited / mixed evidence

Small 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/Cold
Read full entry

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 HerbsMemorial Sloan Kettering Cancer CenterAcademic medical center
  • DiabetesMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — 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 evidence

The 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/CirculationOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Cardiovascular

Bladderwrack

Fucus vesiculosus

Safety concern

A 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 SugarOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Metabolic

Blessed Thistle

Cnicus benedictus

Traditional use — evidence not established

A prickly, bitter herb long used in European folk medicine as a digestive bitter and traditionally believed to support breastfeeding.

Herbs & BotanicalsTraditional European / AmericanSerious safety warningDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Blue Cohosh

Caulophyllum thalictroides

Safety concern

A 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/Menopause
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Reproductive / menstrual / menopause

Related remedies

Blueberries

Vaccinium corymbosum

Limited / mixed evidence

A 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 Nutrition
Read full entry

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 depthNIH NCCIHU.S. federal health source
  • AntioxidantsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — 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

Borage Seed Oil

Borago officinalis

Limited / mixed evidence

An 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-treatSkinInflammation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Musculoskeletal / pain

Related remedies

Boswellia

Boswellia serrata

Limited / mixed evidence

The 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 SystemsDigestionPainInflammationSkin
Read full entry

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

Related concerns

Body systems: Digestive · Skin · Musculoskeletal / pain

Brazil Nuts

Bertholletia excelsa

Limited / mixed evidence

A 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 NutritionOther
Read full entry

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

  • MineralsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Food allergyMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • ChokingMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — 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

Breathing and Relaxation Techniques

Some evidence

Simple, 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/Circulation
Read full entry

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

Related concerns

Body systems: Nervous system / sleep · Musculoskeletal / pain · Cardiovascular · Reproductive / menstrual / menopause

Breathing-Focused Body Scan

Some evidence

A 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/AnxietySleepPain
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Musculoskeletal / pain

Brewer's Yeast

Saccharomyces cerevisiae

Traditional use — evidence not established

A 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Metabolic · Immune / general wellness

Broccoli Sprouts

Brassica oleracea (sprouted seed)

Limited / mixed evidence

Young broccoli seedlings marketed for their concentrated sulforaphane content, a compound also present in mature cruciferous vegetables.

Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianSerious safety warningGeneral Nutrition
Read full entry

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 illnessMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • CancerMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Pregnancy and nutritionMedlinePlus — 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 evidence

A 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/ColdPainInflammationSkin
Read full entry

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

Related concerns

Body systems: Digestive · Respiratory · Skin · Musculoskeletal / pain

Brown Rice

Oryza sativa

Some evidence

A 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 Nutrition
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • CarbohydratesMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

Related remedies

Buckwheat

Fagopyrum esculentum

Limited / mixed evidence

A 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 Nutrition
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Celiac diseaseMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Food allergyMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

Bulgur

Triticum spp.

Some evidence

A 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 Nutrition
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Celiac diseaseMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • CarbohydratesMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

Burdock

Arctium lappa

Traditional use — evidence not established

A 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 warningSkinDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Skin

Related remedies

Butcher's Broom

Ruscus aculeatus

Limited / mixed evidence

A 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/Circulation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular

Butterbur

Petasites hybridus

Safety concern

A 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/ColdPain
Read full entry

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

Related concerns

Body systems: Respiratory · Musculoskeletal / pain

Cabbage

Brassica oleracea var. capitata

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • SodiumMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Calendula

Calendula officinalis

Limited / mixed evidence

A bright orange garden flower long used in European folk medicine on cuts, minor burns and irritated skin.

Topical / SkinTraditional European / AmericanSkinInflammation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin

Calendula (Topical)

Calendula officinalis

Limited / mixed evidence

Marigold 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 SystemsSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin

Capsaicin Cream

Capsicum annuum / Capsicum frutescens

Some evidence

A 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 warningPain
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Musculoskeletal / pain

Caraway

Carum carvi

Limited / mixed evidence

A 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 AsianDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Cardamom

Elettaria cardamomum

Traditional use — evidence not established

An 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 Sugar
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

Carrots

Daucus carota

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • ChokingMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Toddler nutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Immune / general wellness

Cascara Sagrada

Frangula purshiana (Rhamnus purshiana)

Evidence against / not recommended

The 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-treatDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Cashews

Anacardium occidentale

Some evidence

A 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 Nutrition
Read full entry

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 fatsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Food allergyMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • ChokingMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular · Metabolic

Castor Oil (Topical)

Ricinus communis

Traditional use — evidence not established

A 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 SystemsSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Musculoskeletal / pain

Related remedies

Cat's Claw

Uncaria tomentosa

Traditional use — evidence not established

A 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 warningPainInflammation
Read full entry

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

Related concerns

Body systems: Musculoskeletal / pain

Catnip

Nepeta cataria

Traditional use — evidence not established

A 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 / AmericanSleepDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Nervous system / sleep

Related remedies

Cayenne (Capsaicin)

Capsicum annuum

Limited / mixed evidence

The 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/Circulation
Read full entry

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 HerbsMemorial Sloan Kettering Cancer CenterAcademic medical center
  • IndigestionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — 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 established

The 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 AsianUrinaryPain
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Musculoskeletal / pain · Urinary

Chaga Mushroom

Inonotus obliquus

Traditional use — evidence not established

A 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 NutritionOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Metabolic · Immune / general wellness

Chamomile

Matricaria chamomilla / Chamaemelum nobile

Limited / mixed evidence

A 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/AnxietyDigestionSkin
Read full entry

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

Related concerns

Body systems: Digestive · Skin · Nervous system / sleep

Chamomile Tea

Matricaria chamomilla

Limited / mixed evidence

The 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/Anxiety
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Nervous system / sleep

Related remedies

Chasteberry

Vitex agnus-castus

Limited / mixed evidence

A peppery Mediterranean berry used since antiquity, today mainly for premenstrual symptoms.

Herbs & BotanicalsTraditional European / AmericanSerious safety warningPainMenstrual/Menopause
Read full entry

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

Related concerns

Body systems: Musculoskeletal / pain · Reproductive / menstrual / menopause

Chia Seeds

Salvia hispanica

Limited / mixed evidence

A 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 Nutrition
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Dietary fatsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • ConstipationMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular

Chickpeas

Cicer arietinum

Some evidence

A 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 Nutrition
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Dietary proteinsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular · Metabolic

Chickweed

Stellaria media

Traditional use — evidence not established

A 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 warningSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin

Chicory Root

Cichorium intybus

Limited / mixed evidence

The 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 / AmericanDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Chiropractic and Spinal Manipulation

Some evidence

A 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-treatPain
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Musculoskeletal / pain

Chlorella

Chlorella vulgaris

Limited / mixed evidence

A 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 Sugar
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Metabolic · Immune / general wellness

Cinnamon

Cinnamomum verum / Cinnamomum cassia

Limited / mixed evidence

A everyday kitchen spice from tree bark, traded for millennia and now studied for blood sugar.

Foods & Kitchen RemediesTraditional AsianTraditional European / AmericanDigestionCough/ColdSkinHeart/CirculationMetabolic/Blood Sugar
Read full entry

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

Related concerns

Body systems: Digestive · Respiratory · Skin · Cardiovascular · Metabolic

Cinnamon Tea

Cinnamomum verum / Cinnamomum cassia

Limited / mixed evidence

Cinnamon 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 SugarDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

Related remedies

Citrus Fruits (General)

Citrus spp.

Some evidence

The 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/Cold
Read full entry

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 CMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • AntioxidantsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Immune / general wellness

Cleavers

Galium aparine

Traditional use — evidence not established

A 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 / AmericanUrinarySkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Urinary

Related remedies

Clinical Hypnosis

Some evidence

A 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/AnxietyPainNausea
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep

Clove

Syzygium aromaticum

Limited / mixed evidence

The 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-treatPainDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Cocoa / Dark Chocolate

Theobroma cacao

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular · Metabolic

Related remedies

Cocoa Butter

Theobroma cacao

Evidence against / not recommended

A 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-treatSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin

Coconut Oil (Topical)

Cocos nucifera

Some evidence

A 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 SystemsSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin

Cold Therapy

Some evidence

Applying 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-treatPainInflammation
Read full entry

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 strainsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Back painMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Musculoskeletal / pain

Comfrey

Symphytum officinale

Safety concern

A 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-treatPainInflammationSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Skin · Musculoskeletal / pain

Related remedies

Cool Compress

Some evidence

A 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 SystemsPainInflammation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Musculoskeletal / pain

Related remedies

Cordyceps

Ophiocordyceps sinensis / Cordyceps militaris

Limited / mixed evidence

A 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 NutritionOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory · Musculoskeletal / pain · Immune / general wellness

Coriander / Cilantro

Coriandrum sativum

Traditional use — evidence not established

One 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 Sugar
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

Related remedies

Corn Silk

Zea mays

Traditional use — evidence not established

The 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 / AmericanUrinary
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Urinary

Related remedies

Cranberry

Vaccinium macrocarpon

Some evidence

A tart North American berry used by Native peoples as food and medicine, best known today for urinary health.

Foods & Kitchen RemediesTraditional European / AmericanSkinUrinary
Read full entry

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

Related concerns

Body systems: Skin · Urinary

Cruciferous Vegetables

Brassica spp.

Limited / mixed evidence

The 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 NutritionDigestion
Read full entry

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

  • CancerMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Dietary fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Immune / general wellness

Cumin

Cuminum cyminum

Limited / mixed evidence

A 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 Sugar
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

Cupping

Limited / mixed evidence

A 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-treatPainSkin
Read full entry

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

  • CuppingNIH NCCIHU.S. federal health source
  • BurnsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Skin conditionsMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Musculoskeletal / pain

Curry Leaf

Murraya koenigii

Traditional use — evidence not established

The 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 AsianDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Damask Rose Petal

Rosa damascena

Limited / mixed evidence

Fragrant 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/AnxietySkinDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Skin · Nervous system / sleep

Related remedies

Damiana

Turnera diffusa

Traditional use — evidence not established

A 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/AnxietyOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Reproductive / menstrual / menopause

Related remedies

Dance and Movement Practice

Some evidence

Rhythmic 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/Circulation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Musculoskeletal / pain · Cardiovascular

Dandelion

Taraxacum officinale

Traditional use — evidence not established

The 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 Sugar
Read full entry

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

Related concerns

Body systems: Digestive · Respiratory · Metabolic

Dandelion Tea

Taraxacum officinale

Limited / mixed evidence

A 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 / AmericanDigestionUrinary
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Urinary

Related remedies

Dates

Phoenix dactylifera

Limited / mixed evidence

A 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 Nutrition
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • PotassiumMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • DiabetesMedlinePlus — 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

Devil's Claw

Harpagophytum procumbens

Limited / mixed evidence

A 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 SystemsPainInflammation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Musculoskeletal / pain

Related remedies

Dietary Fiber

Stronger evidence

The 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 Nutrition
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • ConstipationMedlinePlus — 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 evidence

A 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 SystemsDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Dill Seed

Anethum graveolens

Traditional use — evidence not established

A 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 warningDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Dong Quai

Angelica sinensis

Evidence against / not recommended

A 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/Circulation
Read full entry

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 HerbsMemorial Sloan Kettering Cancer CenterAcademic medical center
  • MenopauseMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • MenstruationMedlinePlus — 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 evidence

A 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 Sugar
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • CarbohydratesMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

Echinacea

Echinacea purpurea and related species

Limited / mixed evidence

A 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 ThroatSkin
Read full entry

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

Related concerns

Body systems: Respiratory · Skin

Eggs

Some evidence

A 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/Circulation
Read full entry

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 proteinsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Food allergyMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • How to lower cholesterol with dietMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Foodborne illnessMedlinePlus — 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 evidence

A hedgerow tree whose cooked berries and flowers have been made into syrups, cordials and wines across Europe for centuries.

Herbs & BotanicalsTraditional European / AmericanCough/Cold
Read full entry

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

Related concerns

Body systems: Respiratory

Elderflower

Sambucus nigra (flower)

Traditional use — evidence not established

The 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/Cold
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory · Immune / general wellness

Related remedies

Elderflower Tea

Sambucus nigra

Traditional use — evidence not established

A 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/Cold
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory · Immune / general wellness

Related remedies

Eleuthero

Eleutherococcus senticosus

Limited / mixed evidence

A 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/AnxietyOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Immune / general wellness

Enoki Mushroom

Flammulina velutipes

Traditional use — evidence not established

A 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 NutritionOther
Read full entry

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 illnessMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Food safetyMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Ephedra

Ephedra sinica

Evidence against / not recommended

A 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 Sugar
Read full entry

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

Related concerns

Body systems: Respiratory · Cardiovascular · Metabolic

Epsom Salt Soak

Traditional use — evidence not established

A 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 / AmericanPainSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Musculoskeletal / pain

Eucalyptus Leaf

Eucalyptus globulus

Traditional use — evidence not established

The 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 Throat
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory

Eucalyptus Oil

Eucalyptus globulus

Limited / mixed evidence

A 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/Cold
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory · Skin

European Mistletoe

Viscum album

Limited / mixed evidence

A 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 warningPain
Read full entry

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

Related concerns

Body systems: Musculoskeletal / pain

Evening Primrose Oil

Oenothera biennis

Limited / mixed evidence

Seed 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/Menopause
Read full entry

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

Related concerns

Body systems: Respiratory · Skin · Musculoskeletal / pain · Reproductive / menstrual / menopause

Expressive Writing / Journaling

Some evidence

A 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/Anxiety
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep

Extra Virgin Olive Oil

Olea europaea (fruit oil)

Some evidence

The 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 Nutrition
Read full entry

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 fatsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • How to lower cholesterol with dietMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • CholesterolMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular

Related remedies

Fatty Fish (Omega-3 Food Sources)

Some evidence

Cold-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 Nutrition
Read full entry

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 fatsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • How to lower cholesterol with dietMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular

Fennel

Foeniculum vulgare

Limited / mixed evidence

An 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/Menopause
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Fennel Tea

Foeniculum vulgare

Limited / mixed evidence

A 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 AsianDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Fenugreek

Trigonella foenum-graecum

Limited / mixed evidence

A 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 Sugar
Read full entry

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

Related concerns

Body systems: Skin · Musculoskeletal / pain · Metabolic · Reproductive / menstrual / menopause

Fermented Foods

Limited / mixed evidence

An 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Immune / general wellness

Feverfew

Tanacetum parthenium

Limited / mixed evidence

A small daisy-like plant used in European folk practice for fevers and headaches, now mostly taken for migraine.

Herbs & BotanicalsTraditional European / AmericanSerious safety warningPainInflammationMenstrual/Menopause
Read full entry

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

Related concerns

Body systems: Musculoskeletal / pain · Reproductive / menstrual / menopause

Figs

Ficus carica

Some evidence

An 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 Nutrition
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • ConstipationMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

Flaxseed / Flaxseed Oil

Linum usitatissimum

Some evidence

One 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 Nutrition
Read full entry

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

Related concerns

Body systems: Digestive · Respiratory · Skin · Cardiovascular · Metabolic · Reproductive / menstrual / menopause · Immune / general wellness

Fluids and Hydration

Stronger evidence

Drinking 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/ColdPainSkin
Read full entry

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

Related concerns

Body systems: Digestive · Respiratory · Skin · Musculoskeletal / pain

Fo-Ti

Reynoutria multiflora (syn. Polygonum multiflorum)

Safety concern

A 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-treatOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Immune / general wellness

Related remedies

Forest Bathing / Time in Nature

Limited / mixed evidence

Spending 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/AnxietyOther
Read full entry

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

  • StressMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • AnxietyMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Cardiovascular

Galangal

Alpinia galanga

Traditional use — evidence not established

A 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 warningDigestionNausea
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Garcinia Cambogia

Garcinia gummi-gutta

Limited / mixed evidence

A 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 Sugar
Read full entry

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

Related concerns

Body systems: Cardiovascular · Metabolic

Gardening and Horticultural Activity

Limited / mixed evidence

Hands-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/Anxiety
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Musculoskeletal / pain

Garlic

Allium sativum

Limited / mixed evidence

A 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/Circulation
Read full entry

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

Related concerns

Body systems: Digestive · Respiratory · Skin · Cardiovascular

Gentian

Gentiana lutea

Traditional use — evidence not established

A 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 / AmericanDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Ginger

Zingiber officinale

Some evidence

A 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/Menopause
Read full entry

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

Related concerns

Body systems: Digestive · Respiratory · Skin · Musculoskeletal / pain · Reproductive / menstrual / menopause

Ginger Tea

Zingiber officinale

Some evidence

Sliced 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/Menopause
Read full entry

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

Related concerns

Body systems: Digestive · Respiratory · Musculoskeletal / pain · Reproductive / menstrual / menopause

Ginkgo

Ginkgo biloba

Limited / mixed evidence

The leaf of an ancient Chinese tree, sold widely for memory and circulation.

Herbs & BotanicalsTraditional AsianSerious safety warningPainHeart/Circulation
Read full entry

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

Related concerns

Body systems: Musculoskeletal / pain · Cardiovascular

Goldenrod

Solidago virgaurea

Traditional use — evidence not established

A 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 / AmericanUrinary
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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

Links last checked 2026-09-14

Related concerns

Body systems: Urinary

Goldenseal

Hydrastis canadensis

Traditional use — evidence not established

A 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 ThroatSkin
Read full entry

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

Related concerns

Body systems: Respiratory · Skin

Gotu Kola

Centella asiatica

Limited / mixed evidence

A 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/Circulation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Cardiovascular

Related remedies

Grains of Paradise

Aframomum melegueta

Traditional use — evidence not established

A 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 DiasporaDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Grape Seed Extract

Vitis vinifera

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

Related concerns

Body systems: Skin · Musculoskeletal / pain · Cardiovascular · Immune / general wellness

Grapefruit

Citrus × paradisi

Some evidence

A 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 NutritionOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular · Immune / general wellness

Grapes

Vitis vinifera

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

  • AntioxidantsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • ChokingMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular · Metabolic

Green Tea

Camellia sinensis

Limited / mixed evidence

Unfermented 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 Sugar
Read full entry

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

Related concerns

Body systems: Digestive · Cardiovascular · Metabolic

Green Tea (as a Drink)

Camellia sinensis

Limited / mixed evidence

Lightly 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 Sugar
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular · Metabolic

Related remedies

Guarana

Paullinia cupana

Limited / mixed evidence

A 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/CirculationOther
Read full entry

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 HerbsMemorial Sloan Kettering Cancer CenterAcademic medical center
  • CaffeineMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • High blood pressureMedlinePlus — 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 evidence

The 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 SystemsDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Guided Imagery

Some evidence

A 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/AnxietySleepPain
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep

Gymnema Sylvestre

Gymnema sylvestre

Limited / mixed evidence

A 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 Sugar
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Metabolic

Hawthorn

Crataegus species

Limited / mixed evidence

A 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/Circulation
Read full entry

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

Related concerns

Body systems: Digestive · Respiratory · Nervous system / sleep · Musculoskeletal / pain · Cardiovascular

Hazelnuts

Corylus avellana

Some evidence

A 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 Nutrition
Read full entry

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 fatsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Food allergyMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • ChokingMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular · Metabolic

Heat Therapy

Some evidence

Applying 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/Menopause
Read full entry

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 painMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Sprains and strainsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • BurnsMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Musculoskeletal / pain

Hemp Seeds

Cannabis sativa

Limited / mixed evidence

The 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/Circulation
Read full entry

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 proteinsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Dietary fatsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular · Metabolic

Hibiscus / Roselle

Hibiscus sabdariffa

Limited / mixed evidence

A 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/Circulation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular

Related remedies

Hibiscus Tea

Hibiscus sabdariffa

Limited / mixed evidence

A 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/Circulation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular

Holy Basil (Tulsi)

Ocimum tenuiflorum

Limited / mixed evidence

A 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/Cold
Read full entry

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

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 evidence

An 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 Sugar
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Metabolic · Immune / general wellness

Honey

Some evidence

One 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 ThroatSkin
Read full entry

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 homeMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • CoughMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Sore throatMedlinePlus — 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 evidence

The 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 Nutrition
Read full entry

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 homeMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Common coldMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Sore throatMedlinePlus — 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 established

A 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 Sugar
Read full entry

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

Related concerns

Body systems: Digestive · Metabolic

Hops

Humulus lupulus

Limited / mixed evidence

The 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/Anxiety
Read full entry

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 HerbsMemorial Sloan Kettering Cancer CenterAcademic medical center
  • InsomniaMedlinePlus — 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 established

A 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 Throat
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Respiratory

Related remedies

Horse Chestnut

Aesculus hippocastanum

Limited / mixed evidence

The conker tree of European parks; processed seed extract is used for leg vein problems.

Herbs & BotanicalsTraditional European / AmericanSerious safety warningCough/ColdPainInflammationHeart/Circulation
Read full entry

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

Related concerns

Body systems: Respiratory · Musculoskeletal / pain · Cardiovascular

Horsetail

Equisetum arvense

Traditional use — evidence not established

A 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 / AmericanUrinary
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Urinary

Related remedies

Humidified Air and Steam

Limited / mixed evidence

Adding moisture to dry air can ease a scratchy throat, blocked nose and night-time cough.

Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianCough/ColdSore ThroatSkin
Read full entry

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 homeMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • BurnsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • CoughMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Related concerns

Body systems: Respiratory · Skin

Hydrotherapy

Limited / mixed evidence

Using 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/Circulation
Read full entry

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

  • ArthritisMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • OsteoarthritisMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Back painMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Musculoskeletal / pain · Cardiovascular

Hyssop

Hyssopus officinalis

Traditional use — evidence not established

An 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 Throat
Read full entry

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

  • CoughMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Sore throatMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Herbal medicine — health topicMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Respiratory

Related remedies

Ivy Leaf

Hedera helix

Limited / mixed evidence

The 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/Cold
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory

Related remedies

Jasmine Flower

Jasminum officinale / Jasminum sambac

Limited / mixed evidence

Fragrant 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/AnxietySleep
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep

Related remedies

Jojoba Oil

Simmondsia chinensis

Limited / mixed evidence

A 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 SystemsSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin

Related remedies

Jujube

Ziziphus jujuba

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Nervous system / sleep

Related remedies

Juniper

Juniperus communis

Traditional use — evidence not established

The 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 / AmericanUrinaryDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Urinary

Related remedies

Kale

Brassica oleracea var. sabellica

Limited / mixed evidence

A 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 Nutrition
Read full entry

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 KMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular · Immune / general wellness

Kava

Piper methysticum

Safety concern

A 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/Anxiety
Read full entry

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

Related concerns

Body systems: Nervous system / sleep

Kefir

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Kimchi

Traditional use — evidence not established

A 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Kiwi

Actinidia deliciosa

Some evidence

A 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 Nutrition
Read full entry

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 CMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Dietary fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Food allergyMedlinePlus — 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 established

A 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 DiasporaOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Cardiovascular

Related remedies

Kudzu

Pueraria montana var. lobata

Limited / mixed evidence

A 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/MenopauseOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Metabolic · Reproductive / menstrual / menopause

Related remedies

Lavender

Lavandula angustifolia

Limited / mixed evidence

A Mediterranean flower used for scent, linens, baths and calm across Europe and North Africa.

Oils & AromaticsTraditional European / AmericanSerious safety warningSleepStress/AnxietyPainSkin
Read full entry

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

Related concerns

Body systems: Skin · Nervous system / sleep · Musculoskeletal / pain

Leafy Green Vegetables

Some evidence

Spinach, 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 Nutrition
Read full entry

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 pressureMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Dietary fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular

Legumes and Beans

Some evidence

Beans, 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular · Metabolic

Lemon Balm

Melissa officinalis

Limited / mixed evidence

A lemon-scented mint-family herb long used in European traditional medicine to ease nervous tension and support sleep and digestion.

Herbs & BotanicalsTraditional European / AmericanSleepStress/AnxietyDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Nervous system / sleep

Lemon Balm Tea

Melissa officinalis

Limited / mixed evidence

A lemon-scented mint-family leaf steeped into a mild, calming tea traditionally used in the evening or after a meal.

Teas & InfusionsTraditional European / AmericanSleepStress/Anxiety
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Nervous system / sleep

Lemon Verbena

Aloysia citrodora

Traditional use — evidence not established

A 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/Anxiety
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Nervous system / sleep

Related remedies

Lemongrass

Cymbopogon citratus

Traditional use — evidence not established

A 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/Cold
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Nervous system / sleep

Related remedies

Lemongrass Tea

Cymbopogon citratus

Traditional use — evidence not established

A 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/Cold
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Respiratory

Related remedies

Lemons and Limes

Citrus limon / Citrus aurantiifolia

Some evidence

Sharply 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 Throat
Read full entry

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 CMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Immune / general wellness

Lentils

Lens culinaris

Some evidence

A 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 Nutrition
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • IronMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • AnemiaMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular · Metabolic

Licorice Root

Glycyrrhiza glabra

Safety concern

A sweet root used in Chinese herbal formulas, Middle Eastern drinks and European confectionery.

Herbs & BotanicalsTraditional AsianTraditional European / AmericanHigh caution — do not self-treatDigestionCough/ColdSore Throat
Read full entry

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

Related concerns

Body systems: Digestive · Respiratory

Licorice Root Tea

Glycyrrhiza glabra

Limited / mixed evidence

A 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/Circulation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Respiratory · Cardiovascular

Related remedies

Light Therapy for Seasonal Low Mood

Some evidence

Sitting 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/AnxietyOther
Read full entry

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 disorderMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • DepressionMedlinePlus — 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 established

The pale, fragrant flowers of the linden (lime) tree, long brewed as a bedtime and cold-season tea across Europe.

Teas & InfusionsTraditional European / AmericanSleepCough/ColdStress/Anxiety
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory · Nervous system / sleep

Related remedies

Linden Tea

Tilia spp.

Traditional use — evidence not established

A mild, fragrant infusion from the flowers of the linden (lime) tree, a European folk remedy unrelated to citrus limes.

Teas & InfusionsTraditional European / AmericanSleepStress/AnxietyCough/Cold
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory · Nervous system / sleep

Lion's Mane Mushroom

Hericium erinaceus

Limited / mixed evidence

A shaggy white culinary mushroom traditionally eaten in Chinese and Japanese cooking, now widely sold as a brain-health supplement.

Herbs & BotanicalsTraditional AsianSerious safety warningGeneral NutritionOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Nervous system / sleep · Immune / general wellness

Maca

Lepidium meyenii

Limited / mixed evidence

A 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 Nutrition
Read full entry

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 HerbsMemorial Sloan Kettering Cancer CenterAcademic medical center
  • MenopauseMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — 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 established

The 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-treatDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Maitake Mushroom

Grifola frondosa

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Metabolic · Immune / general wellness

Mango

Mangifera indica

Some evidence

A 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 Nutrition
Read full entry

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 CMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA
  • NutritionMedlinePlus — 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 established

A 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/Cold
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Respiratory

Related remedies

Marshmallow Leaf

Althaea officinalis

Traditional use — evidence not established

The 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 ThroatUrinary
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory · Urinary

Related remedies

Marshmallow Root

Althaea officinalis

Traditional use — evidence not established

A mucilage-rich root, historically the original source of marshmallow confections, traditionally used to soothe irritated throats and digestive linings.

Herbs & BotanicalsTraditional European / AmericanSore ThroatCough/ColdDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Respiratory

Related remedies

Massage Therapy

Some evidence

Hands-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/AnxietyPain
Read full entry

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

Related concerns

Body systems: Nervous system / sleep · Musculoskeletal / pain

Mastic Gum

Pistacia lentiscus

Limited / mixed evidence

A 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 SystemsDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Matcha

Camellia sinensis

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Immune / general wellness

Related remedies

Medical-Grade Honey Wound Dressing

Some evidence

A 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-treatSkin
Read full entry

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 injuriesMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • BurnsMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Skin

Meditation and Mindfulness

Some evidence

Training 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/Circulation
Read full entry

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

Related concerns

Body systems: Nervous system / sleep · Musculoskeletal / pain · Cardiovascular

Menthol Rubs

Limited / mixed evidence

A 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/Cold
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory · Skin

Milk and Fortified Dairy

Some evidence

Cow'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 Nutrition
Read full entry

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

  • CalciumMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Lactose intoleranceMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • OsteoporosisMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Food allergyMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Musculoskeletal / pain · Metabolic

Milk Thistle

Silybum marianum

Limited / mixed evidence

A spiny purple-flowered thistle used in European practice for the liver for around two thousand years.

Herbs & BotanicalsTraditional European / AmericanUrinaryMetabolic/Blood Sugar
Read full entry

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

Related concerns

Body systems: Metabolic · Urinary

Millet

Pennisetum glaucum / Eleusine coracana (various species)

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Celiac diseaseMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Thyroid diseasesMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

Mindfulness-Based Stress Reduction (MBSR)

Some evidence

A 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/AnxietyPainSleep
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep

Miso

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

  • SodiumMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Food allergyMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular

Moringa

Moringa oleifera

Limited / mixed evidence

A 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 Sugar
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Metabolic · Immune / general wellness

Related remedies

Motherwort

Leonurus cardiaca

Traditional use — evidence not established

A 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/Anxiety
Read full entry

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

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 established

A 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/Menopause
Read full entry

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

Related concerns

Body systems: Skin · Reproductive / menstrual / menopause

Mullein

Verbascum thapsus

Traditional use — evidence not established

A 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 Throat
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory

Mushroom Extracts and Powders (General)

Traditional use — evidence not established

A 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 NutritionOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Immune / general wellness

Music Therapy

Limited / mixed evidence

Structured 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/AnxietyPain
Read full entry

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

  • AnxietyMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Chronic painMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • DepressionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep

Mustard Seed

Brassica nigra / Sinapis alba

Traditional use — evidence not established

Small 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/ColdSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Respiratory · Skin

Related remedies

Myrrh

Commiphora myrrha

Traditional use — evidence not established

An 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 Throat
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Skin

Related remedies

Nasturtium

Tropaeolum majus

Traditional use — evidence not established

A 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory · Urinary

Related remedies

Natto

Limited / mixed evidence

A 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 Nutrition
Read full entry

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 KMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Food allergyMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular

Related remedies

Neem

Azadirachta indica

Limited / mixed evidence

A 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-treatSkinOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Skin · Immune / general wellness

Nettle Tea

Urtica dioica

Traditional use — evidence not established

A brewed infusion made from dried stinging nettle leaf; cooking or drying removes the sting, unlike the fresh raw plant.

Teas & InfusionsTraditional European / AmericanUrinaryHeart/Circulation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory · Cardiovascular · Urinary

Related remedies

Noni

Morinda citrifolia

Traditional use — evidence not established

A strong-smelling Pacific Island fruit long used in Polynesian practice and now sold widely as juice.

Herbs & BotanicalsOther Traditional SystemsSerious safety warningDigestionPainInflammationSkin
Read full entry

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

Related concerns

Body systems: Digestive · Skin · Musculoskeletal / pain

Nopal (Prickly Pear Cactus)

Opuntia ficus-indica

Limited / mixed evidence

The 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 Nutrition
Read full entry

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

  • DiabetesMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • CholesterolMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Herbal medicine — health topicMedlinePlus — 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 concern

A 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-treatDigestionSleep
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Nervous system / sleep

Related remedies

Oat Bran

Avena sativa

Some evidence

The 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular · Metabolic

Oat Straw

Avena sativa

Limited / mixed evidence

The 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/AnxietySleep
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep

Related remedies

Oatmeal Bath

Avena sativa

Limited / mixed evidence

Finely ground oats stirred into a lukewarm bath — a long-standing home measure for itchy, irritated skin.

Topical / SkinTraditional European / AmericanSkin
Read full entry

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

  • EczemaMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Related concerns

Body systems: Skin

Oats

Avena sativa

Stronger evidence

One 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 Nutrition
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • How to lower cholesterol with dietMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • CholesterolMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular · Metabolic

Olive Leaf

Olea europaea

Limited / mixed evidence

The 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 Sugar
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular · Metabolic

Related remedies

Onion (Traditional Remedy Use)

Allium cepa

Limited / mixed evidence

Beyond 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/Circulation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory · Skin · Cardiovascular

Oolong Tea

Camellia sinensis

Limited / mixed evidence

A 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 Nutrition
Read full entry

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 sheetNIH NCCIHU.S. federal health source
  • CaffeineMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Metabolic · Immune / general wellness

Oranges

Citrus sinensis (and related Citrus spp.)

Some evidence

One of the most common citrus fruits and a major dietary source of vitamin C, folate and potassium.

Foods & Kitchen RemediesTraditional AsianTraditional European / AmericanGeneral NutritionCough/Cold
Read full entry

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 CMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Immune / general wellness

Oregano

Origanum vulgare

Traditional use — evidence not established

A 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/ColdDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Respiratory · Skin

Related remedies

Osteopathic Manipulative Treatment

Limited / mixed evidence

A 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 / AmericanPain
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Musculoskeletal / pain

Oyster Mushroom

Pleurotus ostreatus

Traditional use — evidence not established

A 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 Nutrition
Read full entry

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

  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Dietary fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

Papaya (Fruit)

Carica papaya

Limited / mixed evidence

A 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 Nutrition
Read full entry

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 CMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Reproductive / menstrual / menopause

Related remedies

Papaya Leaf

Carica papaya

Limited / mixed evidence

The 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-treatDigestionOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Immune / general wellness

Paprika

Capsicum annuum

Traditional use — evidence not established

Ground dried peppers, ranging from mild and sweet to smoked or hot, central to Hungarian, Spanish and many other cuisines.

Foods & Kitchen RemediesTraditional European / AmericanDigestionGeneral Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Parsley

Petroselinum crispum

Traditional use — evidence not established

A 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Urinary

Related remedies

Passionflower

Passiflora incarnata

Limited / mixed evidence

A 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/AnxietySkin
Read full entry

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

Related concerns

Body systems: Skin · Nervous system / sleep

Pau d'Arco

Tabebuia impetiginosa (also called Handroanthus impetiginosus)

Safety concern

The 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-treatOtherSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Immune / general wellness

Related remedies

Peanuts

Arachis hypogaea

Some evidence

A 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 Nutrition
Read full entry

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 allergyMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • ChokingMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Dietary fatsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Child nutritionMedlinePlus — 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

Pears

Pyrus communis

Some evidence

A fibre-rich fruit, including a form of fibre (sorbitol) that in larger amounts can loosen stool.

Foods & Kitchen RemediesTraditional European / AmericanOther Traditional SystemsDigestionGeneral Nutrition
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • ConstipationMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Peppermint Oil

Mentha × piperita

Some evidence

A cooling mint oil long used for stomach complaints and headache, and one of the better-studied herbal products for IBS.

Oils & AromaticsTraditional European / AmericanDigestionCough/ColdPainSkin
Read full entry

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

Related concerns

Body systems: Digestive · Respiratory · Skin · Musculoskeletal / pain

Peppermint Oil (Topical)

Mentha × piperita

Limited / mixed evidence

Concentrated 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/Cold
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Nervous system / sleep

Peppermint Tea

Mentha × piperita

Limited / mixed evidence

Mint 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/Cold
Read full entry

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

Related concerns

Body systems: Digestive · Respiratory

Periwinkle

Catharanthus roseus (Vinca rosea)

Safety concern

A 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 SugarOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Metabolic

Pine Needle

Pinus spp.

Traditional use — evidence not established

The 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory · Immune / general wellness

Pineapple

Ananas comosus

Limited / mixed evidence

A 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 Nutrition
Read full entry

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 CMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Immune / general wellness

Pistachios

Pistacia vera

Some evidence

A 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 Nutrition
Read full entry

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 fatsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Food allergyMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • ChokingMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular · Metabolic

Plantain Leaf

Plantago major / Plantago lanceolata

Traditional use — evidence not established

A 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 warningSkinInflammation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin

Plums

Prunus domestica

Limited / mixed evidence

A stone fruit closely related to prunes (dried plums), providing fibre and antioxidant compounds when eaten fresh.

Foods & Kitchen RemediesTraditional European / AmericanTraditional AsianDigestionGeneral Nutrition
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • ConstipationMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Pomegranate

Punica granatum

Limited / mixed evidence

An 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 Sugar
Read full entry

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

Related concerns

Body systems: Respiratory · Skin · Cardiovascular · Metabolic · Urinary

Poppy Seed

Papaver somniferum

Traditional use — evidence not established

Tiny 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 NutritionOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Prayer and Spiritual Practice as a Coping Approach

Traditional use — evidence not established

Personal 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/AnxietyOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep

Progressive Muscle Relaxation

Some evidence

A 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/AnxietySleepPain
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Musculoskeletal / pain

Prunes and Prune Juice

Prunus domestica

Some evidence

Dried 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/ColdSkin
Read full entry

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

  • ConstipationMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Dietary fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Related concerns

Body systems: Digestive · Respiratory · Skin

Psyllium

Plantago ovata

Some evidence

A 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/Circulation
Read full entry

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

  • ConstipationMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Dietary fiberMedlinePlus — 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 established

The 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 Nutrition
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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 fatsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Dietary proteinsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Metabolic · Immune / general wellness

Pygeum

Prunus africana

Limited / mixed evidence

The 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 DiasporaUrinary
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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

Links last checked 2026-09-14

Related concerns

Body systems: Urinary · Reproductive / menstrual / menopause

Qigong

Limited / mixed evidence

A 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/CirculationOther
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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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Musculoskeletal / pain · Cardiovascular

Related remedies

Quinoa

Chenopodium quinoa

Limited / mixed evidence

A 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 Nutrition
Read full entry

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 proteinsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Celiac diseaseMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

Raisins

Vitis vinifera (dried)

Some evidence

Dried 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 Nutrition
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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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • ChokingMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

Raspberries

Rubus idaeus

Some evidence

A 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 Nutrition
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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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • AntioxidantsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular

Raspberry Leaf

Rubus idaeus

Limited / mixed evidence

The 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/MenopauseDigestion
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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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Reproductive / menstrual / menopause

Related remedies

Red Clover

Trifolium pratense

Limited / mixed evidence

A 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/Circulation
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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

Related concerns

Body systems: Respiratory · Skin · Cardiovascular · Reproductive / menstrual / menopause

Reflexology

Limited / mixed evidence

A 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/AnxietyPainNausea
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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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep

Reishi Mushroom

Ganoderma lucidum

Limited / mixed evidence

A 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/Circulation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular · Immune / general wellness

Related remedies

Rhodiola

Rhodiola rosea

Limited / mixed evidence

A cold-climate mountain root used in Scandinavia and Russia for endurance and fatigue.

Herbs & BotanicalsTraditional European / AmericanTraditional AsianStress/AnxietyCough/Cold
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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

Related concerns

Body systems: Respiratory · Nervous system / sleep

Rooibos Tea

Aspalathus linearis

Traditional use — evidence not established

A 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 Nutrition
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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

Links last checked 2026-09-14

Related concerns

Body systems: Immune / general wellness

Rose Hips

Rosa canina

Limited / mixed evidence

The 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 NutritionPainInflammation
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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

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 evidence

A 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 warningDigestionSkinOther
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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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Skin · Nervous system / sleep

Saffron

Crocus sativus

Limited / mixed evidence

The 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/Menopause
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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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Reproductive / menstrual / menopause

Related remedies

Sage

Salvia officinalis

Limited / mixed evidence

A 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 Sugar
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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

Related concerns

Body systems: Respiratory · Skin · Metabolic · Reproductive / menstrual / menopause

Sage Tea

Salvia officinalis

Limited / mixed evidence

A 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/Menopause
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Reproductive / menstrual / menopause

Related remedies

Saline Nasal Rinse

Some evidence

Rinsing 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/ColdSkin
Read full entry

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

Related concerns

Body systems: Respiratory · Skin

Saline Wound Cleansing

Some evidence

Clean 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 SystemsSkin
Read full entry

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 injuriesMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Skin conditionsMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Skin

Salt Water Gargle

Some evidence

Gargling 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 ThroatSkin
Read full entry

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

Related concerns

Body systems: Respiratory · Skin

Sardines

Some evidence

A 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 Nutrition
Read full entry

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 fatsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • MercuryMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Food allergyMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Pregnancy and nutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Musculoskeletal / pain · Cardiovascular

Sarsaparilla

Smilax officinalis / Smilax spp.

Traditional use — evidence not established

A tropical vine root historically used in Central and South American traditional medicine and once flavored old-style soft drinks.

Herbs & BotanicalsOther Traditional SystemsTraditional European / AmericanSkinPainOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Musculoskeletal / pain

Related remedies

Sauerkraut

Traditional use — evidence not established

Cabbage 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Sauna and Heat Bathing

Limited / mixed evidence

Sitting 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/Anxiety
Read full entry

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

  • DehydrationMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • FeverMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • BurnsMedlinePlus — 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 established

A peppery Mediterranean herb related to thyme, traditionally paired with beans and used in European folk remedies for digestion.

Herbs & BotanicalsTraditional European / AmericanDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Saw Palmetto

Serenoa repens

Limited / mixed evidence

The 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/ColdUrinary
Read full entry

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

Related concerns

Body systems: Respiratory · Urinary

Schisandra

Schisandra chinensis

Limited / mixed evidence

A red berry named for combining all five traditional flavors, long used in Chinese herbal medicine as a general tonic.

Herbs & BotanicalsTraditional AsianStress/AnxietyGeneral NutritionOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Immune / general wellness

Related remedies

Seaweed and Nori

Limited / mixed evidence

A 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 Nutrition
Read full entry

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 diseasesMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • MineralsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Pregnancy and nutritionMedlinePlus — 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

Senna

Senna alexandrina

Some evidence

A 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-treatDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Sesame Seeds

Sesamum indicum

Limited / mixed evidence

One 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 Nutrition
Read full entry

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 fatsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • How to lower cholesterol with dietMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular · Metabolic

Shea Butter

Vitellaria paradoxa

Traditional use — evidence not established

A 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 DiasporaSkin
Read full entry

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 conditionsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • EczemaMedlinePlus — 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 established

A 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/MenopauseOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Reproductive / menstrual / menopause

Related remedies

Shiitake Mushroom

Lentinula edodes

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

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 established

A distinctive numbing, citrusy spice from the husks of a shrub in the citrus family, central to Sichuan cooking and traditional Chinese medicine.

Herbs & BotanicalsTraditional AsianDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Skullcap

Scutellaria lateriflora

Traditional use — evidence not established

A 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/Anxiety
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep

Related remedies

Sleep-Hygiene Routine

Stronger evidence

A 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 / AmericanSleep
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep

Slippery Elm

Ulmus rubra

Traditional use — evidence not established

The 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/Cold
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Respiratory

Related remedies

Sorghum

Sorghum bicolor

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Celiac diseaseMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

Soy

Glycine max

Limited / mixed evidence

A staple bean of East Asian cooking — tofu, miso, tempeh, soy milk — also sold as concentrated isoflavone pills.

Foods & Kitchen RemediesTraditional AsianSkinMenstrual/MenopauseHeart/CirculationGeneral Nutrition
Read full entry

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

Related concerns

Body systems: Skin · Cardiovascular · Reproductive / menstrual / menopause · Immune / general wellness

Spearmint

Mentha spicata

Limited / mixed evidence

A 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 SystemsDigestionNauseaOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Reproductive / menstrual / menopause

Related remedies

Spinach

Spinacia oleracea

Some evidence

A 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 Nutrition
Read full entry

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 KMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Folic acidMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • IronMedlinePlus — 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

Spirulina

Arthrospira platensis

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Immune / general wellness

Related remedies

St. John's Wort

Hypericum perforatum

Some evidence

A 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/Menopause
Read full entry

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

Related concerns

Body systems: Skin · Nervous system / sleep · Musculoskeletal / pain · Reproductive / menstrual / menopause

Star Anise

Illicium verum

Traditional use — evidence not established

A 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/Cold
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Respiratory

Related remedies

Stevia Leaf

Stevia rebaudiana

Some evidence

A 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 Nutrition
Read full entry

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

  • DiabetesMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Herbal medicine — health topicMedlinePlus — 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 evidence

A 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 / AmericanUrinaryInflammation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Skin · Urinary

Related remedies

Strawberries

Fragaria × ananassa

Some evidence

A berry fruit rich in vitamin C and antioxidant plant compounds, commonly grouped with other berries in nutrition guidance.

Foods & Kitchen RemediesTraditional European / AmericanHeart/CirculationGeneral Nutrition
Read full entry

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 CMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • AntioxidantsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular · Immune / general wellness

Stretching and Mobility Practice

Some evidence

Deliberate 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 SystemsPain
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Musculoskeletal / pain

Sumac

Rhus coriaria

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

  • DiabetesMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • CholesterolMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Poison ivy, oak and sumacMedlinePlus — 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 established

General, 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 / AmericanSkinPain
Read full entry

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

  • BurnsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Skin conditionsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Wounds and injuriesMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Skin

Sunflower Seeds

Helianthus annuus

Traditional use — evidence not established

The 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 Nutrition
Read full entry

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 fatsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • AntioxidantsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Metabolic · Immune / general wellness

Sweet Almond Oil (Topical)

Prunus dulcis

Limited / mixed evidence

A 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 SystemsSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin

Sweet Basil

Ocimum basilicum

Traditional use — evidence not established

The 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Sweet Potatoes

Ipomoea batatas

Some evidence

A 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 Nutrition
Read full entry

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

  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Dietary fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Toddler nutritionMedlinePlus — 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 evidence

Chinese practices of slow, coordinated movement and breathing, practised in parks and courtyards for generations.

Mind-Body / Non-Drug PracticesTraditional AsianStress/AnxietyPainInflammationHeart/Circulation
Read full entry

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

Related concerns

Body systems: Nervous system / sleep · Musculoskeletal / pain · Cardiovascular

Tamarind

Tamarindus indica

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

  • ConstipationMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Dietary fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Herbal medicine — health topicMedlinePlus — 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 established

An 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 / AmericanDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Tart Cherry

Prunus cerasus

Limited / mixed evidence

A 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 Nutrition
Read full entry

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

  • CarbohydratesMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • DiabetesMedlinePlus — 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

Tea Tree Oil

Melaleuca alternifolia

Limited / mixed evidence

An Australian oil used by Aboriginal peoples from crushed leaves, now common in skin and hair products.

Oils & AromaticsOther Traditional SystemsSerious safety warningCough/ColdSkin
Read full entry

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

Related concerns

Body systems: Respiratory · Skin

Tea Tree Oil (Topical)

Melaleuca alternifolia

Limited / mixed evidence

A 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-treatSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin

Related remedies

Tempeh

Limited / mixed evidence

An 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 Nutrition
Read full entry

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 proteinsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Food allergyMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Foodborne illnessMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

Related remedies

Thunder God Vine

Tripterygium wilfordii

Safety concern

A 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-treatPainInflammationSkin
Read full entry

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

Related concerns

Body systems: Skin · Musculoskeletal / pain

Thyme Tea

Thymus vulgaris

Limited / mixed evidence

A 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 Throat
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Respiratory

Tomatoes and Lycopene Foods

Solanum lycopersicum

Limited / mixed evidence

A 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 Nutrition
Read full entry

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 depthNIH NCCIHU.S. federal health source
  • AntioxidantsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • HeartburnMedlinePlus — 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 established

A 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-treatOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Immune / general wellness

Tremella Mushroom

Tremella fuciformis

Traditional use — evidence not established

A 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Skin

Triphala

Blend of Emblica officinalis, Terminalia bellirica and Terminalia chebula

Limited / mixed evidence

A classic Ayurvedic blend of three dried fruits, used for centuries in South Asia as a gentle digestive tonic and mild laxative.

Herbs & BotanicalsTraditional AsianDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

Turkey Tail Mushroom

Trametes versicolor

Limited / mixed evidence

A 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 AsianOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Immune / general wellness

Turmeric

Curcuma longa

Limited / mixed evidence

The 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/Circulation
Read full entry

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

Related concerns

Body systems: Digestive · Skin · Nervous system / sleep · Musculoskeletal / pain · Cardiovascular

Turmeric Tea

Curcuma longa

Limited / mixed evidence

Turmeric 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-treatInflammationDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Musculoskeletal / pain

Related remedies

Uva Ursi

Arctostaphylos uva-ursi

Safety concern

A 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-treatUrinary
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Urinary

Related remedies

Valerian

Valeriana officinalis

Limited / mixed evidence

A strong-smelling European root used for sleep and nerves since ancient Greece and Rome.

Herbs & BotanicalsTraditional European / AmericanSerious safety warningSleepStress/AnxietyPainMenstrual/Menopause
Read full entry

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

Related concerns

Body systems: Nervous system / sleep · Musculoskeletal / pain · Reproductive / menstrual / menopause

Vanilla

Vanilla planifolia

Traditional use — evidence not established

The 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Violet Leaf

Viola odorata

Traditional use — evidence not established

A small, fragrant woodland flower used in European folk medicine as a soothing tea for coughs and mild skin complaints.

Herbs & BotanicalsTraditional European / AmericanCough/ColdSore ThroatSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Respiratory · Skin

Related remedies

Walking as a Daily Practice

Stronger evidence

Ordinary 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/AnxietySleep
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Nervous system / sleep · Musculoskeletal / pain · Cardiovascular · Metabolic

Related remedies

Walnuts

Juglans regia

Some evidence

A 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 Nutrition
Read full entry

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 dietMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Dietary fatsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — 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 evidence

Cold for fresh swelling, warmth for stiffness — the most common non-drug comfort measure there is.

Topical / SkinTraditional European / AmericanTraditional AsianCough/ColdPainInflammationSkin
Read full entry

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 strainsMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Related concerns

Body systems: Respiratory · Skin · Musculoskeletal / pain

Warm Compress

Limited / mixed evidence

A 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/Menopause
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Musculoskeletal / pain

Related remedies

Watercress

Nasturtium officinale

Some evidence

A 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 Nutrition
Read full entry

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

  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • AntioxidantsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Vitamin AMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Cardiovascular · Immune / general wellness

Watermelon

Citrullus lanatus

Limited / mixed evidence

A 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 Sugar
Read full entry

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

  • AntioxidantsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • DiabetesMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Metabolic · Urinary

Wheat Bran

Triticum aestivum

Some evidence

The fiber-concentrated outer layer of the wheat kernel, used mainly to add insoluble fiber to the diet for regularity.

Foods & Kitchen RemediesTraditional European / AmericanDigestionGeneral Nutrition
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Celiac diseaseMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Wheat Germ

Triticum aestivum

Limited / mixed evidence

The 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 Nutrition
Read full entry

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 vitaminsMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Celiac diseaseMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Wheatgrass

Triticum aestivum (young shoots)

Limited / mixed evidence

The 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 Nutrition
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Immune / general wellness

Related remedies

White Button Mushroom

Agaricus bisporus

Some evidence

The 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 Nutrition
Read full entry

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

  • NutritionMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA
  • Dietary proteinsMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Metabolic

White Mulberry Leaf

Morus alba

Limited / mixed evidence

The 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 Sugar
Read full entry

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

Related concerns

Body systems: Respiratory · Cardiovascular · Metabolic

White Pepper

Piper nigrum

Traditional use — evidence not established

The 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 AsianDigestion
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive

Related remedies

White Tea

Camellia sinensis

Traditional use — evidence not established

The 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 Nutrition
Read full entry

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 sheetNIH NCCIHU.S. federal health source
  • CaffeineMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • AntioxidantsMedlinePlus — U.S. National Library of MedicineU.S. federal health source

Links last checked 2026-09-14

Related concerns

Body systems: Immune / general wellness

Whole-Grain Bread

Some evidence

Bread 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 Nutrition
Read full entry

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 fiberMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Celiac diseaseMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • SodiumMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Healthy diet — fact sheetWorld Health OrganizationInternational government / WHO / EMA

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Cardiovascular · Metabolic

Wild Yam

Dioscorea villosa

Limited / mixed evidence

A 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/MenopausePain
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Musculoskeletal / pain · Reproductive / menstrual / menopause

Related remedies

Wintergreen

Gaultheria procumbens

Safety concern

A 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-treatPainInflammation
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin · Musculoskeletal / pain

Witch Hazel (Plant)

Hamamelis virginiana

Limited / mixed evidence

A 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 / AmericanSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Skin

Related remedies

Witch Hazel (Topical)

Hamamelis virginiana

Limited / mixed evidence

A 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 / AmericanSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Skin

Wormwood

Artemisia absinthium

Safety concern

A 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-treatDigestionOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Nervous system / sleep

Related remedies

Yarrow

Achillea millefolium

Traditional use — evidence not established

A 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 warningDigestionSkinOther
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Skin

Related remedies

Yellow Dock

Rumex crispus

Traditional use — evidence not established

A 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 / AmericanDigestionSkin
Read full entry

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

Links last checked 2026-09-14

Related concerns

Body systems: Digestive · Skin

Related remedies

Yerba Mate

Ilex paraguariensis

Limited / mixed evidence

A 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-treatOtherDigestion
Read full entry

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

  • CaffeineMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • CancerMedlinePlus — U.S. National Library of MedicineU.S. federal health source
  • Herbal medicine — health topicMedlinePlus — 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 evidence

A 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/Circulation
Read full entry

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

Related concerns

Body systems: Nervous system / sleep · Musculoskeletal / pain · Cardiovascular

Yogurt and Probiotic Foods

Limited / mixed evidence

Fermented milk and vegetables carry live microbes and appear in food traditions on every continent.

Foods & Kitchen RemediesTraditional African / African DiasporaTraditional AsianTraditional European / AmericanOther Traditional SystemsDigestionSkin
Read full entry

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

Related concerns

Body systems: Digestive · Skin

Yohimbe

Pausinystalia johimbe

Safety concern

West 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 Sugar
Read full entry

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

Related concerns

Body systems: Metabolic

Yucca

Yucca schidigera / Yucca spp.

Traditional use — evidence not established

A 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 / AmericanPainInflammationDigestion
Read full entry

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

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.