5:1 Water Extract 50% Polyphenols (30% Catechins) Antioxidant Protection Supports Cardiovascular and Immune Health Dietary Supplement Jarrow FORMULAS Green Tea 500 is water extracted and consists of 50% polyphenols, including 30% catechins, approximately 15% of which is the important EGCG fraction. The polyphenols in green tea are potent antioxidants and support cardiovascular and immune health.