Green tea extract

The water-soluble polyphenols (catechins) extracted from the leaves of green tea. The most potent of them is EGCG.

Also known as: Green Tea Catechins, Epigallocatechin gallate, EGCG

examine.com

ConsumerLabs

Wikipedia

pubMed

https://www.lifeextension.com/magazine/2008/4/new-research-on-the-health-benefits-of-green-tea/page-01