Grape Seed Extract Details Product Name: Grape Seed Extract Herb Source: Vitis vinifera Linn Part Used: Seed Active Ingredients: Proanthocyanidins (OPC), Polyphenols Specifications: Proanthocyanidins 90%,95%,98%; Polyphenols 95% Test Method: UV, TLC Appearance: Red-brown powder CAS#: 84929-27-1 Pharmacology: Grape seed extract–OPCs , best known for its anti-oxidant, has been shown to be 20 times greater than Vitamin C & 50 times stronger …