Jarrow Formulas Resveratrol Synergy brings together resveratrol (3,4',5-trihydroxystilbene) and other naturally-occurring phenolic antioxidant compounds to support the body's endogenous antioxidant network and the cardiovascular system. Pterostilbene (Silbinol), also known as dimethylresveratrol, is a naturally-occurring, methylated form of resveratrol. Methylation greatly improves intestinal and cellular uptake of this important phytochemical while reducing excessive liver clearance.