This is a crude red sour grape powder devoid of chemical processing, the freshest grape extract available. This is a crude red sour grape powder devoid of chemical processing, the freshest grape extract available. This sun-dried formula full of photonic energy, is full of resveratrol, malic acid, tartaric acid, vitamin C and the minerals chromium and potassium. The whole grape- skin, seed, and sour pulp is used. Let slowly dissolve under the tongue for maximum potency or in your favorite beverage. •a true sour, that is non-sweet, way to get the powers of grape; ideal for all people, especially those sensitive to sugar •a natural source of biologically active resveratrol• a top source of naturally occurring chromium in a biologically available form an ideal food for adding sour organic acids, which are heart healthy, to the food an alternative way to create a sour taste on food versus lemons