Curcumin is a yellow polyphenol extracted from the rhizome of turmeric (Curcuma longa L.), curcumin usually accounts for 2-5% of turmeric, but this is considered the most important component determining the value of turmeric. saffron. Commercial curcumin powders are usually in the form of curcuminoids. Curcuminoid consists of a mixture of 3 components: curcumin, demethoxycurcumin and bisdemethoxycurcumin in the ratio of 77: 17: 3.