5:1 Green Tea Extract Capsules. Supports Immune Health & Detoxification. 50% Green Tea Polyphenols. Including 30% catechins. Catechins Support 24h Energy Expenditure. Jarrow Formulas Green Tea 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.