We use a 100:1 concentrate guaranteed to contain a minimum of 95% proanthocyanidins.  Proanthocyanidins are a class of biologically active flavonoids found throughout the plant kingdom and are one of the most potent antioxidants in nature.  The grape seed extract we use is made exclusively from fresh, non-GMO grape seeds separated during juice production.  This method produces a high ratio of the key polyphenols.  Unlike some grape seed products, which are made from oven or sun dried seeds, this method results in a lower ratio of key polyphenols.  The extraction process uses water and ultra filtration, unlike other methods that use non-organic or alcohol solvents.  The result is a 100:1 concentrate of pure, potent polyphenols.