Catechins

Catechin is a naturally occurring flavanol which includes catechin, (−)-epicatechin, epigallocatechin, (−)-epicatechin gallate, and epigallocatechin gallate. These phytochemicals are well-known antioxidants originally derived from catechu1. Catechin is present in a variety of natural sources such as green tea, grapes, apples, and red wine2.