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Our most concentrated green tea extract ever to wear the Swanson Superior Herbs label. TEAVIGO is 90 percent EGCG (epigallocatechin gallate), the active component responsible for this herb’s healthful benefits. With TEAVIGO you get more antioxidant activity and more health- boosting power. Compare price and potency and you’ll see TEAVIGO is the best choice for economical EGCG supplementation.