For Longer Life 98% Polyphenols One-Per-Day Concentrated Polyphenol Extract Dietary Supplement Non GMO The botanical extract in Mega Green Tea Extract has been concentrated and dual standardized to ensure the highest quality, consistency, and biological activity. Each serving contains a small amount of caffeine (max. of 3.6 mg). Since one cup of decaffeinated tea contains at least 9 mg of caffeine, the amount of caffeine in this supplement will most likely not induce a stimulating effect.