A 100:1 concentrate guaranteed to contain a minimum of 80% Proanthocyanidins and 95% polyphenols. Unlike some grape seed products, Natural Factors Grape Seed (Vitis vinifera) is not made from oven or sun-dried seeds. It is made exclusively from fresh, non-GMO grape seeds separated during juice production. This method produces a high ratio of the key polyphenols. The result is a 100:1 concentrate of pure, potent polyphenols. These flavonoids help to strengthen blood vessels, increasing the tone and elasticity of capillary walls, enhance the effect of Vitamin C, and help to quench free radicals.