Grapeseeds, or pips, are the last part of the grape to be used after the outer waxy bloom and internal pulp. Grapes are grown in warm temperate regions all over the world. Each grape contains only two to four seeds. Grapeseeds contain a potent antioxidant called Proanthocyanidins. Proanthocyanidins are also called OPCs (oligomeric procyanidins) or PCOs (procyanidolic oligomers).