CellCynergy Nutrition’s Premium Heart Defender+ Resveratrol Supplement contains a therapeutic dose of 50% Standardized Trans-Resveratrol. This powerful flavonoid & polyphenol antioxidant is commonly associated with red wine. It can also be found in blueberries, peanut butter and dark chocolate. Japanese knotweed has one of the highest concentrations of the active compound in resveratrol which is where we source ours from.