A nutritional supplement for dogs to support immune system, circulatory functions, and skin health. Antiox™ is a grape seed extract supplement. PCOs are a special class of water soluble bioflavonoids that are potent antioxidants. In some comparative tests, PCOs were found to be 50 times more potent than Vitamin E and 20 times more potent than Vitamin C. PCOs prevent the release of histamine from mast cells thereby reducing the adverse effects of histamine. PCOs support capillary strength. Weak capillaries can contribute to bruising, elastin and collagen dysfunction, edema, and circulatory insufficiencies. This dietary supplement supports immune system and circulatory functions and proper skin health.