Whole turmeric (fresh, powdered, or in supplements) tends to contain lower curcumin levels (around 3%). Some researchers contend the higher the curcumin content, the more potent a product will be.
Curcumin has an estimated bioavailability of 65% after oral administration. It inhibits cytochrome P-450 isoenzyme 1A1 and is metabolized by glucuronidation. [13] Neither turmeric nor curcumin has ...