WHAT ARE SUPER STRENGTH GREEN TEA CAPSULES 450mg? BULK POWDERS™ Super Strength Green Tea Capsules are an award-winning, ultra-potent form of Green Tea Extract, containing 95% Polyphenols, 70% Catechins, 45% EGCG & 7% Caffeine. In comparison, most Green Tea supplements contain around half these amounts, at best. If you are looking for the highest strength Green Tea supplement available, at an extremely low price, look no further. Don't just take our word for it either... Men's Health