Resveratrol 80 mg Tabs, 8% Standardized Extract, 120 Tablets, Source NaturalsResveratrol Antioxidant Protection. Resveratrol is a protective compound produced by grapevines and other plants in response to environmental stresses. Studies have demonstrated that resveratrol has potent antioxidant activity and also has the ability to inhibit platelet aggregation. These actions may help minimize free radical damage throughout the body and provide support to the cardiovascular system. Supplement Facts for 80 mg Serving Size: 1