Terry Naturally Clinical OPC - Grape Seed Extract Regular & Extra Strength MSRP: $24.76 - $41.56 Superior Absorption for Full Benefit Years of research have found that the benefits of grape seed extract are due to Oligomeric Proanthocyanidins, known as OPCs. But these powerful health-promoting nutrients need to be absorbed in order to support good... Qty in Cart: 0 Price: MSRP: $24.76 - $41.56 Subtotal: Options