Supports immune system, circulatory functions, and skin health in cats and dogs. Recommended for: Animals exposed to environmental toxins (car exhaust, second hand smoke, carpet fresheners etc.) Animals that need joint, immune, circulatory, and vascular support. Antiox is standardized to yield 95% proanthocyanidins per capsule. Proanthocyanidins are a special type of water-soluble bioflavonoids that are potent antioxidants. Proanthocyanidins help to normalize the release of histamine from mast cells thereby reducing the adverse effectsof histamine. Proanthocyanidins support capillary strength.