Quick answer

No official daily amount is set for curcumin or turmeric. Trials in healthy adults used from 80 mg of curcumin a day in an absorption-enhanced form up to 4 g of standard curcumin. NCCIH calls conventional forms likely safe for up to 2 or 3 months, and the same milligrams can mean very different blood levels by product.^1,2,3,4

Key facts

Pure turmeric powder averaged 3.14% curcumin by weight, so 1 g of the spice holds roughly 31 mg.⁵
For curcumin used as a food color, EFSA applies an acceptable daily intake of 3 mg per kg of body weight, about 210 mg for a 70 kg adult.⁶
Absorption-enhanced forms put about 1.3 to 46 times more curcuminoids into the blood than standard curcumin.^4,7
Early studies gave up to 8,000 mg of curcumin a day for 3 months without finding toxicity, although little of it reached the blood.^8,9

Amounts used in the studies we rely on

Nobody has set a recommended amount, so the best guide is what researchers gave. The amounts below come from the trials behind our two graded benefits and from early safety studies. They are not advice, and they are not interchangeable, because each used a different product.¹

Curcumin amounts in human studies^{2,3,8,9,10,11,12,13}
What was studied	Product	Amount a day	How long
Muscle soreness after hard exercise, 14 pooled studies with 349 people	Many formulations	150 mg to 4 g of curcumin	One dose to several weeks
Memory and attention, 60 and 80 healthy adults	Solid lipid product	400 mg of product, holding 80 mg of curcumin	One dose, then 4 and 12 weeks
Memory and attention, 40 adults aged 51 to 84	Absorption-enhanced curcumin	180 mg, as 90 mg twice a day	18 months
Memory tests, 39 adults, little or no difference	Solid lipid product	2,000 mg of product	12 weeks
Memory tests, 96 older adults, little or no difference	A third formulation	1,500 mg	12 months
Early safety study, 25 people	Curcumin extract	Up to 8,000 mg	3 months
Single-dose tolerance, 24 volunteers	Standard curcumin extract	500 to 12,000 mg, once	One day

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.^2,3,11

Why the same milligrams are not the same dose

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.^4,7

So a label that reads 500 mg of curcumin cannot be compared with another until you know the form. A plain extract and a lecithin or micelle product can put very different amounts into the blood, and a trial result with one does not carry over to the other. The forms guide goes through each type.^1,4,7

Early studies gave up to 8,000 mg of curcumin a day for 3 months, and single doses up to 12,000 mg, without finding toxicity, although little or none of it reached the blood.^8,9

Turmeric spice and the food-color allowance

At the 3.14% average, 1 g of pure turmeric powder holds about 31 mg of curcumin, and 5 g holds about 160 mg. Curry powders held much less and varied widely, so a spoonful of curry powder is not a way to count milligrams.⁵

The one per-person figure from an official body is EFSA's acceptable daily intake for curcumin used as a food color. It scales with body weight, so it gives a different number for each person. It was set for a color added to foods, not as a dose for supplements, and several trials above gave far more.⁶

EFSA's food-color allowance by body weight, at 3 mg per kg a day⁶
Body weight	Allowance a day
50 kg	150 mg
60 kg	180 mg
70 kg	210 mg
80 kg	240 mg
90 kg	270 mg

The table is our arithmetic from EFSA's 3 mg per kg figure. No official source gives a separate curcumin amount for women and for men.⁶

How long amounts were taken

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

The longest trial we used ran 18 months, in 40 people, with an absorption-enhanced form. For standard forms, NCCIH's 2 to 3 month figure is the only duration an official source gives, so we cannot point to a tested basis for taking more for longer.^1,11

Limits, liver warnings and who should ask first

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.⁶

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.^1,14,15

The Tuscany cases were all linked to high-absorption products with high curcumin doses, and most people recovered after stopping the product. More milligrams of an absorbed form is the combination to be careful with.¹⁵

Pregnant: NCCIH says turmeric supplements may be unsafe in pregnancy¹
Liver disease, or earlier liver trouble with any supplement: ask your doctor first^1,14
Warfarin, another blood thinner or an antiplatelet medicine: ask your doctor or pharmacist first^16,17
Gallstones, a blocked bile duct or past kidney stones: ask your doctor first^18,19
Stop and call a provider at signs of liver damage, such as dark urine or yellowing of the skin or eyes¹

Questions people ask

How much curcumin per day is safe?

No tolerable upper intake level is set. EFSA applies 3 mg per kg of body weight a day to curcumin as a food color, about 210 mg for a 70 kg adult. NCCIH calls conventional forms likely safe for up to 2 or 3 months, and liver injury has been reported with high-absorption products at high doses.^1,6,15

How much turmeric per day for a woman or a man?

No official source sets different amounts for women and men. EFSA's food-color allowance of 3 mg per kg of body weight works out to 150 mg for a 50 kg adult and 210 mg for a 70 kg adult, but it is not a supplement dose.⁶

Does adding black pepper change the amount I need?

It changes how much curcumin reaches the blood. In one study, 20 mg of piperine taken with 2 g of curcumin raised bioavailability by 2,000%, so milligrams of plain curcumin and milligrams of curcumin with piperine cannot be compared.²⁰

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Sources

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