EGCG is a type of plant compound called catechin. Research suggests that catechins like EGCG may play a role in protecting your cells from damage and preventing disease. EGCG is probably best known for its role as the major active compound in green tea, indeed it is the most abundant catechin in tea. The numerous health benefits associated with drinking green tea are typically credited to its Epigallocatechin gallate content. Epigallocatechin gallate, also known as epigallocatechin-3-gallate, is the ester of epigallocatechin and gallic acid, and is a type of catechin. Epigallocatechin gallate is most prevalent in green tea but also found in smaller quantities in other types of tea, fruit, and some nuts. Other health-promoting catechins are plentiful in red wine, dark chocolate, legumes, and most fruit.