Curcumin vs Turmeric Explained
The difference between turmeric the spice and curcumin the compound, with curcumin percentages by origin and the adulteration to screen for.
Curcumin-by-origin table
Turmeric is the dried rhizome; curcumin is the yellow curcuminoid compound inside it, reported as a percentage. When a buyer pays for "high curcumin", they are paying for that percentage, which varies sharply by origin.
| Origin / grade | Curcumin content | Note |
|---|---|---|
| Alleppey-type finger | 4-6% | Highest-curcumin trade grade |
| Erode | 2.5-3% | GI Erode Manjal belt |
| Nizamabad bulb | 1.5-2.25% | High-volume bulb turmeric |
| Export finger moisture | <=12% | Typical export specification |
Turmeric vs curcumin, cleared up
- Turmeric is the spice; curcumin is one measurable component of it. A turmeric can be labelled by variety and origin, but its value for colour and nutraceutical use tracks its curcumin percentage.
- Curcumin percentage drives price: Alleppey-type finger at 4-6% commands more than Nizamabad bulb at 1.5-2.25%.
- Alleppey finger is a traded grade, not a GI; the Alleppey GI covers green cardamom. The GI turmerics are Erode, Sangli, Waigaon and Kandhamal.
Adulteration to screen for
Because buyers pay for colour, low-curcumin turmeric has been illegally brightened with lead chromate, a yellow pigment and a serious heavy-metal hazard. Buy on a lab-reported curcumin figure and require heavy-metal testing rather than judging on visual brightness.
Frequently asked
What is the difference between turmeric and curcumin?
Turmeric is the dried rhizome spice; curcumin is the yellow curcuminoid compound inside it, measured as a percentage. Curcumin ranges from about 1.5% in Nizamabad bulb to 4-6% in Alleppey-type finger.
How do you check turmeric is not adulterated?
Buy on a lab-reported curcumin figure and require heavy-metal testing. Low-curcumin turmeric has been illegally brightened with lead chromate, so do not judge on visual colour alone.
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Start a sourcing enquiry →What this page does not tell you
- Heavy-metal limit figures
- Numeric lead and heavy-metal maximum levels for turmeric are not in our verified set, so only the adulteration risk and testing need are stated.
- Curcumin of unlisted origins
- Curcumin percentages for origins beyond Alleppey, Erode and Nizamabad are not in our verified set and are not tabulated.
Reviewed 16 July 2026.
Sources
- Spices Board of India — Export statistics· Tier 1, retrieved 2026-07-16
- Geographical Indications Registry, India — Registered GIs· Tier 1, retrieved 2026-07-16
- CBI — Entering the European market for spices and herbs· Tier 2, retrieved 2026-07-16