Beyond Grape Seed helps strengthen the entire vascular system. OPCs prevent capillary leakage in the legs, eyes and skin reducing fluid retention. Without OPCs, destructive enzymes are free to attack the structure of the blood vessels. Free radicals further degenerate these vessels, causing lesions that become traps for bad cholesterol (LDL). Once LDL cholesterol has been trapped it attracts calcium. Cholesterol and calcium build up to form plaque, which narrows the arteries and encourages blood clot formation.