Resveratrol is a polyphenol naturally found in the skin of red grapes, certain berries, and other plants. Recent research has shown that Resveratrol can help to support general health through several biological functions. NOW® Natural Resveratrol's comprehensive blend of polyphenols, including natural Trans-Resveratrol, proanthocyanidins (OPCs from grape seed) and catechins (green tea extract) is a potent combination for the promotion of health.