* Power of Nature * Crude Red Sour Grape * Antioxidant rich * Natural Source Chromium * Natural Source Vitamins & Minerals * Dietary Supplement Resvital is the only grape product made from the entire crude red sour grape, including the vine, skin and seeds. Resvital is a rich source of natural grape antioxidants, including resveratrol and proanthocyanidins (OPCs). It also contains natural source potassium, chromium, and vitamin C. Unlike grape seed extract it is free of solvents and fungicides. Resvital is all natural and more powerful than mere grape seed extracts.