My diet:

Turmeric

No E-numberSpices & herbsOrigin: Plant
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Every diet

VeganYes

A dried root, with nothing else added.

Gluten-freeYes
HalalYes
KosherYes
KetoYes

No carbohydrate.

Low-FODMAPYes
The short answer
Turmeric is a dried and ground root, and it is one of the safest ingredients in the pantry: vegan, gluten-free and keto, without exception. The catch is that curcumin is poorly absorbed, so a spoonful of powder is not the same thing as a capsule.
Generally safe

Fine for most people at normal amounts.

E-numberNone
Comes fromPlant
What it doesSpices & herbs
Glycemic index—
Daily limitNot set
Also calledTurmeric, Ground turmeric

Rules by country

🇺🇸 US FDANot evaluated as an additive
🇪🇺 European UnionNot evaluated as an additive
🇨🇦 Health CanadaNot evaluated as an additive
CaliforniaNo extra rules

Turmeric is a food rather than an additive, so it has no E-number and no limit set for it as a spice. It falls under the general hygiene and contaminant rules for dried roots and spices, including limits for lead and Salmonella. The purified color taken from turmeric root is a separate matter: that is E100, which carries its own approval and a daily intake figure in the EU.

Daily limit: Experts haven’t set a number because normal food amounts are far below any level of concern.

What is it?

Turmeric is the bright yellow rhizome of a ginger-family plant, dried and milled into a powder. The color comes from curcuminoids, mostly curcumin, which make up roughly 2 to 5 percent of the powder rather than the bulk of it. The earthy, slightly bitter note comes from volatile oils that are separate from the curcumin. A teaspoon is about 3 grams, so the curcuminoids in a normal spoonful come to a matter of tens of milligrams.

Where it comes from: The dried, ground rhizome of Curcuma longa, a plant of the ginger family cropped in South Asia for thousands of years. India grows most of it, and the same root that colors curry powder is what ends up in the jar labeled turmeric.

Why it’s in food

  • Colors rice and stews
  • Curries and lentil dishes
  • Golden color in sauces
  • Pickles and chutneys
  • Curry powder and spice blends

Often found in

Curry powderRice dishesLentil and chickpea curriesPickles and chutneysMustard powderGolden milk drinksRoasted vegetables

Also listed as: Turmeric, Ground turmeric, Turmeric powder, Turmeric root, Turmeric rhizome

Health & gut impact

Curcumin is a small share of the powderBenefit

The curcuminoids that give turmeric its color, curcumin and its two close relatives, make up roughly 2 to 5 percent of the ground powder by weight. A teaspoon is about 3 grams, so a normal spoonful in a curry delivers on the order of a hundred milligrams, against the several hundred milligrams in a typical supplement capsule.

EFSA Journal, scientific opinion on curcumin

Absorption is the limiting stepUnder study

Curcumin dissolves poorly in water and much of what is swallowed passes through without being absorbed. Cooking the spice in fat and adding black pepper both raise the amount that reaches the bloodstream, which is why a turmeric latte made with milk and pepper behaves differently from turmeric stirred into a glass of water.

EFSA Journal, scientific opinion on curcumin

The color additive is a separate productBenefit

Curcumin extracted and purified from turmeric root is sold as the food color E100, and the EU regulates it separately with its own permitted uses and daily intake limit. Turmeric used as a spice is not E100 and is declared on the label as an ordinary ingredient, because that is what it is.

European Commission Regulation (EC) No 1333/2008

What can I use instead?

Saffron

Ratio: Use a small pinch, as it is far stronger and far dearer

Best for: The golden color and a floral note

Paprika

Ratio: Use the same amount

Best for: Warm color with a milder, sweeter edge

Ginger

Ratio: Use half the amount

Best for: The warmth in a curry powder

Related

More spices & herbs:

BasilBasil is a dried herb leaf: vegan, gluten-free, keto, and one of the safest ingredients in the cupboard. Drying concentrates estragole, a compound EFSA has assessed closely, so a daily spoonful is not the same as a sprig in a sauce.Generally safeBay leafBay leaf is a dried herb that is safe at cooking amounts and fits every diet, including gluten-free and keto. The one thing to know is that the leaf itself is not edible, so pull the whole leaf out before serving the dish.Generally safeBlack pepperBlack pepper is a dried fruit and a genuinely powerful ingredient, because piperine blocks several of the enzymes that metabolize drugs. It is safe in ordinary amounts, and the interaction with medication is the thing worth knowing about.Generally safeCardamomCardamom is a seed pod used as a spice, and at cooking amounts it suits everyone, including gluten-free and keto eaters. Buy green cardamom for baking and chai, and black cardamom for the smoky note of South Asian curries.Generally safe

Common questions

Does a spoonful of turmeric do what a turmeric capsule does?

No. A teaspoon of powder carries roughly a hundred milligrams of curcuminoids and most of it is not absorbed, while a supplement capsule usually holds several hundred milligrams in a form designed to be taken up. Most of the encouraging research has been done with the capsule.

Is turmeric an additive?

Not when it is sold as a spice, which is the usual case. Turmeric is an ordinary food ingredient, so it has no E-number and is listed by name. The purified color extracted from turmeric root is a different thing and appears on the label as E100.

Is turmeric safe to eat every day?

In cooking amounts, yes, and South Asia has eaten it daily for centuries without a safety concern. Concentrated turmeric capsules are a different product, and they are the version to discuss with a doctor if you have gallbladder problems or take regular medication.

Why does turmeric stain every surface it touches?

That is the curcumin doing the job it was selected for. It colors fabric, worktops, wooden spoons and plastic, and once it has soaked into a porous surface it is close to impossible to get out.

Is Turmeric safe?

Generally safe (93/100). Turmeric is a food rather than an additive, so it has no E-number and no limit set for it as a spice. It falls under the general hygiene and contaminant rules for dried roots and spices, including limits for lead and Salmonella. The purified color taken from turmeric root is a separate matter: that is E100, which carries its own approval and a daily intake figure in the EU.

Is Turmeric vegan?

Yes. A dried root, with nothing else added.

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Scientific sources & regulatory citations
  • EFSA Journal, scientific opinion on curcumin
  • European Commission Regulation (EC) No 1333/2008