Isotonix OPC-3 contains Pycnogenol and other bioflavonoids that help maintain cardiovascular health. It promotes normal blood vessel function and reduces oxidative stress by scavenging free radicals. A study found that Isotonix OPC-3 delivered in an isotonic solution was significantly more bioavailable and produced antioxidant effects faster than the same ingredients in tablet form. Isotonix OPC-3 is a safe, natural supplement that supports overall health and well-being.