Quick answer

Turmeric is a ginger-family spice, and curcumin is its best-known compound. Two early benefits are graded here: muscle soreness after hard exercise, from a 14-study analysis, and memory in older adults, from small trials. NCCIH says the evidence is not enough to call turmeric beneficial, and liver injury has been reported, mostly with high-absorption forms.^1,2,3,4

Key facts

Curcumin gives turmeric its yellow color, and pure turmeric powder averaged 3.14% curcumin by weight in one analysis of spice products.^1,5
Plain curcumin is poorly absorbed: after 2 g, blood levels in healthy volunteers were undetectable or very low.⁶
Both graded benefits are early, and a 2024 analysis of 16 papers found no statistically significant effect on soreness at any time point.^2,7
NCCIH calls conventionally formulated turmeric likely safe in recommended amounts for up to 2 or 3 months, and warns that highly bioavailable forms may harm the liver.¹
NCCIH advises stopping turmeric and talking with a health care provider at signs of liver damage, such as dark urine or yellowing of the skin or eyes.¹

What turmeric and curcumin are

Turmeric is the underground stem, or rhizome, of Curcuma longa, a plant in the ginger family grown commercially in India and Southeast Asia.¹

Curcumin gives turmeric its yellow color and is the best known of its curcuminoids; the other two main ones are demethoxycurcumin and bisdemethoxycurcumin.^1,8

The spice in a kitchen jar and the capsule on a shelf are different products. The spice is the ground rhizome, and pure turmeric powder averaged about 3% curcumin by weight. A capsule may hold that same powder, a concentrated curcuminoid extract, or an extract changed to raise absorption.^1,5,8

Curcumin products vary in how much curcumin they actually contain, and many add substances from other plants, such as piperine from black pepper.¹

What the evidence shows

We grade a benefit only when trials in people back a plain claim about how the body works. Two turmeric claims pass, and both are graded early. Most turmeric research is in people with health conditions, which this site does not cover, so it is not used here.¹

May modestly reduce muscle soreness in the days after hard exercise*^2,7,9,10

Early evidence

Three meta-analyses of small randomized trials found lower soreness scores, and lower creatine kinase, a marker of muscle damage, with curcumin than with placebo after hard or unaccustomed exercise. The largest, 14 studies with 349 people, saw the clearest difference 4 days after exercise and with more than a week of use. The pooled differences in soreness were about half a point, and a 2024 meta-analysis of 16 papers found no statistically significant effect at any time point. The trials used many different formulations and doses.

Amount studied: 150 mg to 4 g of curcumin a day in different formulations, from a single dose to several weeks

As absorption-enhanced curcumin, may modestly support working memory and attention in older adults*^{3,11,12,13,14}

Early evidence

Two trials of one solid lipid curcumin product (400 mg a day, 80 mg of curcumin) in 60 and 80 healthy older adults found better working memory than with placebo, one hour after a single dose and after 4 and 12 weeks. An 18-month trial of another enhanced form (90 mg of curcumin twice a day) in 40 adults aged 51 to 84 found better memory and attention scores. Two other trials found little or no difference: 2,000 mg a day of the solid lipid product for 12 weeks in 39 adults, and 1,500 mg a day of a third formulation for 12 months in 96 older adults. All the trials were small, and authors of one positive trial had received funding from the supplement industry.

Amount studied: 80 to 180 mg of curcumin a day in absorption-enhanced forms, from one dose up to 18 months

NCCIH says there is not enough evidence to conclude that turmeric or curcumin is beneficial for any health purpose.¹

Early means small trials, mixed results, or both. Read each claim together with the form and amount that were studied, because a result with one product does not carry over to another.¹

Most clinical studies of turmeric and the skin tested it against skin conditions, and about half applied it to the skin rather than giving it by mouth.¹⁵

Skin is a common reason people look up turmeric. The systematic review we found tested it mostly against skin conditions, and we found no trial of turmeric taken by mouth for healthy skin.¹⁵

Why the form matters

After 2 g of plain curcumin, blood levels in healthy volunteers were undetectable or very low, because it is poorly absorbed and quickly broken down.^6,16

The same number of milligrams can deliver very different amounts: in head-to-head studies, absorption-enhanced forms put about 1.3 to 46 times more curcuminoids into the blood than standard curcumin.^8,17

Because plain curcumin barely reaches the blood, makers add piperine from black pepper or bind curcumin to lecithin, oils or other carriers. The forms guide compares them. Higher absorption also changes the safety picture, which is covered below.^1,6

Amounts studied

No official daily amount is set for turmeric or curcumin. NCCIH says conventionally formulated turmeric or curcumin is likely safe in recommended amounts for up to 2 or 3 months, without naming an amount.¹

Trials in healthy adults gave from 80 mg of curcumin a day in an absorption-enhanced form up to 4 g a day, for anything from a single dose to 18 months.^2,3,12

The dosage guide sets these amounts beside what a spice jar supplies and beside the European allowance for curcumin used as a food color.^5,18

Our line

We do not sell a turmeric product, so this page has no product card. The graded benefits above describe what the studies found, not anything we sell.

Side effects, liver safety and medicines

Turmeric taken by mouth can cause nausea, vomiting, acid reflux, stomach upset, diarrhea or constipation.¹

Liver injury has been reported with turmeric and curcumin products, mostly highly bioavailable formulations. NIH's LiverTox database counts several dozen cases of acute liver injury, along with a low rate of short-lived rises in liver enzymes.^1,4,19

In ten US cases, liver injury began 1 to 4 months after starting turmeric. Eight of the ten were women, five needed hospital care and one died of liver failure, and seven carried the gene variant HLA-B*35:01.²⁰

NCCIH advises stopping turmeric or curcumin and talking with a health care provider at any sign of liver damage, such as tiredness, nausea, poor appetite, dark urine or yellowing of the skin or eyes.¹

Curcumin makes the gallbladder contract: in healthy volunteers, single doses of 20, 40 and 80 mg shrank it by about 34%, 51% and 72% within 2 hours.²¹

Supplemental turmeric raised urinary oxalate in healthy adults, which the researchers said could raise the risk of kidney stones in people prone to them.²²

NIH's breastfeeding database notes that turmeric may increase the risk of bleeding in people taking warfarin or antiplatelet drugs. The warfarin label asks for more frequent INR checks whenever a botanical is started or stopped.^23,24

No tolerable upper intake level is set for turmeric or curcumin supplements. For curcumin used as a food color (E 100), the European Food Safety Authority applies an acceptable daily intake of 3 mg per kg of body weight a day, about 210 mg for a 70 kg adult.¹⁸

The warfarin label does not name turmeric, and we found no medicine label that names it for any medicine. That does not show that a combination is fine. Ask your pharmacist before adding turmeric to any regular medicine.^1,24

Pregnant: NCCIH says turmeric supplements may be unsafe in pregnancy¹
Breastfeeding: little is known about amounts above those commonly found in food^1,23
Liver disease, or earlier liver trouble with any supplement: ask your doctor first^1,4
Warfarin, another blood thinner or an antiplatelet medicine: ask your doctor or pharmacist first^23,24
Gallstones, a blocked bile duct or past kidney stones: ask your doctor first^21,22
Any prescription medicine: NCCIH advises asking your provider before combining herbs and medicines¹

Questions people ask

What does turmeric do for the body?

In laboratory studies curcumin acts on many signalling molecules, but little of it reaches the blood. In people, two early benefits are graded here: muscle soreness after hard exercise and memory in older adults. NCCIH says the evidence is not enough to call turmeric beneficial for any health purpose.^1,2,25

Are there turmeric benefits for skin?

We found no trial of turmeric taken by mouth for healthy skin. In a systematic review of 18 clinical studies, most tested it against skin conditions, nine by mouth and eight on the skin. Curcumin applied to the skin can cause hives or itching.^1,15

Are there turmeric benefits for men?

The abstracts behind our two graded benefits do not report results for men separately. The one exercise-timing trial we found enrolled 24 healthy young men only, and its result is described on the timing page.^2,26

Is it safe to take turmeric every day?

NCCIH calls conventionally formulated turmeric or curcumin likely safe in recommended amounts for up to 2 or 3 months. Liver injury has been reported, mostly with high-absorption products, so ask your doctor before taking it daily for longer, and stop at any sign of liver damage.^1,19

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Sources

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

This page is information, not medical advice. Talk to your doctor or pharmacist about your own situation.