Quercetin 500 Plus (Formula)

Quercetin (or quercetine) is an important member of a class of naturally occurring plant pigments known as flavonoids. The distinctive red color of some wines, onions, and apples is due to the presence of quercetin. The latter two are particularly rich sources of the compound, as is black and green tea. It is also interesting that quercetin serves as a basic building block for many other members of the flavonoid family.