[Product Name] Grape Seed P.E. [Latin Name] Vitis vinifera [Source] Dry ... scavengers in the human body. Many names refer to this set of bioflavonoids, including OPCs, Oligomeric Procyanidolic Complexes, ... when we consume them. It was, in fact, this very ability that led to their discovery. OPC bioflavonoids ... His discovery was made in 1948. In 1951, this same doctor extracted OPCs from pine bark. In 1970, ...