It is the only grape product made from the entire red sour grape including the vine, skin, and seeds. Resvital is the top source of grape antioxidants, including resveratol and proanthocyanidins (OPCs). It is handpicked from remote mountain sources and unlike grape seed extract it is free of solvents and fungicides. Resvital is more natural and powerful than mere grape seed extracts. Nonirradiated, Non-GMO.