Grape seeds are rich in powerful antioxidants and natural plant compounds called oligomeric proanthocyanidin complexes (OPCs).OPCs are most well known for their antioxidant activity, which means, at the very least, grape seed may help to destroy free radicals in your body, which in turn may help you avoid premature aging and certain chronic diseases.However, OPCs also demonstrate a host of other beneficial activities in the body, which may explain why grape seed extract appears to help so many different health conditions while exerting its effects body-wide.Grape seed extract has an incredible antioxidant potential with its flavonoid phytonutrients. These polyphenols include resveratrol and unique oligomeric proanthocyanidin complexes (OPC's). The most potent form is in grape seed extract, as it contains 95% OPC's, which is more than any other antioxidant extract.OPC's help the body produce glutathione, which is the master antioxidant that protects DNA and strengthens the immune system. They also increase intracellular vitamin C levels and strengthen capillaries and thus improve blood oxygen circulation throughout the body. These antioxidants also act to protect soft tissue collagen in the joints and skin from free radical damage and premature aging.The powerful free radical scavenging effects ofgrape seed extractprotect the skin from UV radiation damage, the blood vessel walls from inflammatory stress and the brain from low oxygen states. Due to the benefits that grape seed extract has on these systems, it has been shown to reduce the risk of skin cancer, improve blood pressure and protect against dementia.