Mega Green Tea is a botanical extract that contains 98% total polyphenols and 45% EGCG. The active constituents in green tea are polyphenols, with an antioxidant called EGCG being the most powerful. The antioxidant activity of EGCG is about 25-100 times more potent than vitamins C and E. One cup of green tea may provide 10-40 mg of polyphenos and has antioxidant effects that are greater than a serving of broccoli, or strawberries.