What accounts for the health benefits of green tea extract?
Over 1,800 scientific studies have found that the active constituents in green tea are powerful antioxidants. These are called polyphenols (catechins) and flavonols. Epigallocatechin gallate (you can just call it EGCG) is the most powerful of these antioxidants. Milligram for milligram, EGCG has 25 to 100 times the antioxidant power of vitamins C and E.