Curcumin is a component of the Indian spice turmeric (Curcumin longa), a type of ginger. Curcumin is one of three curcuminoids present in turmeric, the other two being desmethoxycurcumin and bis-desmethoxycurcumin. These curcuminoids give turmeric its yellow color and curcumin is used as a yellow food colorant and food additive.
Curcumin is obtained from the dried rhizome of the turmeric plant, which is a perennial herb that is cultivated extensively in south and southeast Asia. The rhizome or the root is processed to form turmeric which contains 2% to 5% curcumin.