Awesome Vitamins OPC (=Oligomeric Proanthocyanidins) are naturally occurring substances found in various plants, especially in grape seeds, and are part of the diet. One capsule of Awesome Vitamins OPC contains pure grape seed extract. These seeds come from France. In everyday life, the body is constantly attacked by environmental influences, leading to continuous stress and strain on the immune system. One of the greatest dangers is free radicals. Therefore, it is worthwhile to specifically supply the body with antioxidants. This is where Awesome Vitamins OPC comes into play: OPC grape seed extract is one of the most potent antioxidants and is therefore a very powerful helper against free radicals in the body. Simply put: Antioxidants protect cells from damage.