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.* NOTE: 1 capsule provides approximately 40 mg of caffeine.If you have a medical condition (especially hypertension or cardiovascular abnormalities); are pregnant; lactating; trying to conceive; or taking medications (especially hypertensive or cardiac); consult your health care practitioner before using this product. Store in a cool; dry place. Keep out of the reach of children.