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Turmeric
Turmeric — what the European monograph actually supports, what it is not for, the form and how long it is meant to be used, side effects, and the 2 medicine interactions documented for it.
This is a reference page, not a diagnosis and not a prescription. Herbal products are real pharmacology: they have effects, side effects and interactions with medicines. Tell your doctor and your pharmacist everything you take, including teas and supplements, and never stop or change a prescribed medicine because of anything you read here.
What it is
Curcuma longa L. — rhizome (Curcumae longae rhizoma)
Local names across the region this site serves: kurkum (ET) · kurkuma (FI) · куркума (RU).
Grouped here under Digestion, bloating and the bowel. Regulatory position: EU herbal monograph — traditional use.
What the evidence supports
The registered indication: Relief of digestive disturbances such as a feeling of fullness and flatulence.
Turmeric is sold for inflammation, joints, mood, cancer and detox; the indication a European regulator actually accepted is digestive. The reason the gap is so wide is curcumin, the yellow pigment, which does interesting things in a test tube and is absorbed extremely poorly when eaten. Supplement manufacturers solved that by adding piperine from black pepper, or by using phospholipid and nanoparticle formulations that raise blood levels many times over — and that engineering is where the safety story changed. High-absorption turmeric and curcumin products are now among the more frequently reported causes of herb-induced liver injury in Western case series, and NIH LiverTox carries a chapter on it. Turmeric in curry has not been the problem; concentrated, absorption-enhanced capsules taken daily for months are a different exposure entirely.
C — Traditional use only Plausible from thirty or more years of use, which is what a traditional-use registration means. No clinical evidence was required and none has settled it.
What it is not for
Arthritis, inflammatory bowel disease, depression or cancer. The trials in joint pain are small and mixed and do not support replacing treatment.
Form, strength and how long
Dried powdered rhizome as a food and spice, teas, and standardised curcuminoid extracts — frequently with piperine or a bioavailability-enhancing carrier, which is the formulation to look for on the label.
Duration. Traditional-use digestive courses are short. Continuous daily use of a high-absorption extract is the pattern associated with the liver reports.
No gram figure appears on this page on purpose. The plant part, the extraction solvent and the drug-to-extract ratio together define a preparation, and a number taken from one does not describe another. The reasoning is set out on the hub; the amount that applies to you is the one printed on the pack you are holding, and a pharmacist will read it with you.
Side effects
Stomach upset, nausea and loose stools. Liver injury has been reported with high-absorption products: dark urine, yellow eyes or skin, itching, unusual tiredness. Stop and get liver function checked if those appear.
Who should avoid it
Monograph texts contraindicate it in obstruction of the bile duct, and advise medical advice first with gallstones or other biliary disease. Medicinal amounts are not established in pregnancy.
Interactions with medicines
| Medicine or substance | What is described |
|---|---|
| Anticoagulants and antiplatelets (warfarin, DOACs, aspirin, clopidogrel) | Curcumin appears on bleeding-risk lists and cases of disturbed warfarin control have been reported. Culinary use is not the concern; a daily high-absorption capsule alongside an anticoagulant is worth raising. |
| Anything else that stresses the liver | Because absorption-enhanced products carry a documented liver signal, stacking them with other substances that stress the liver — heavy alcohol, other implicated botanicals, medicines with a known hepatic signal — compounds the one serious risk here. |
The reverse view — start from the medicine rather than the plant — is in the medicine, food and alcohol interactions reference, and summarised for every herb on this site.
As a food
This one is also in the kitchen, so the nutrition figures are worth having next to the pharmacology: see the food data page for calories and nutrients per 100 g and per portion. Culinary amounts and medicinal preparations are different exposures, and the difference is usually the whole safety story.
Sources: European Medicines Agency — Committee on Herbal Medicinal Products (HMPC), European Union herbal monographs · LiverTox: Clinical and Research Information on Drug-Induced Liver Injury (NIDDK, National Institutes of Health) · NIH National Center for Complementary and Integrative Health — herb fact sheets · checked 2026-09-06
Frequently asked questions
What is turmeric used for?
Relief of digestive disturbances such as a feeling of fullness and flatulence. Turmeric is sold for inflammation, joints, mood, cancer and detox; the indication a European regulator actually accepted is digestive. The reason the gap is so wide is curcumin, the yellow pigment, which does interesting things in a test tube and is absorbed extremely poorly when eaten. Supplement manufacturers solved that by adding piperine from black pepper, or by using phospholipid and nanoparticle formulations that raise blood levels many times over — and that engineering is where the safety story changed. High-absorption turmeric and curcumin products are now among the more frequently reported causes of herb-induced liver injury in Western case series, and NIH LiverTox carries a chapter on it. Turmeric in curry has not been the problem; concentrated, absorption-enhanced capsules taken daily for months are a different exposure entirely.
Does turmeric work?
Graded C here: Plausible from thirty or more years of use, which is what a traditional-use registration means. No clinical evidence was required and none has settled it. Arthritis, inflammatory bowel disease, depression or cancer. The trials in joint pain are small and mixed and do not support replacing treatment.
How much turmeric should I take?
This reference does not print gram figures, because they do not transfer between preparations of different extract strength. What can be said honestly is the form and the duration: Dried powdered rhizome as a food and spice, teas, and standardised curcuminoid extracts — frequently with piperine or a bioavailability-enhancing carrier, which is the formulation to look for on the label. Traditional-use digestive courses are short. Continuous daily use of a high-absorption extract is the pattern associated with the liver reports.
What are the side effects of turmeric?
Stomach upset, nausea and loose stools. Liver injury has been reported with high-absorption products: dark urine, yellow eyes or skin, itching, unusual tiredness. Stop and get liver function checked if those appear.
Does turmeric interact with medicines?
Yes — documented for Anticoagulants, warfarin, Liver load. Each one is described on this page, with a link to the medicine-side reference where one exists.
Others in digestion, bloating and the bowel
Peppermint
Symptomatic relief of minor spasms of the gastrointestinal tract, flatulence and abdominal pain, especially in irritable bowel syndrome, for gastro-resistant oil capsules; the leaf is registered for mild digestive complaints.
Caraway
Mild spasmodic gastrointestinal complaints including bloating and flatulence.
Ginger
Prevention of nausea and vomiting in motion sickness, and mild digestive complaints such as bloating.
Fennel
Mild spasmodic gastrointestinal complaints including bloating and flatulence; and as an expectorant in cough associated with a cold.
Liquorice
Digestive complaints including burning sensation and dyspepsia; and as an expectorant in cough associated with a cold.
Milk thistle
Relief of digestive complaints, including a feeling of fullness and indigestion.
Keep the whole list in one place
TempoLife logs supplements alongside food, sleep and how you actually felt — so the answer to "what are you taking?" is a screen, not a guess.