This product offers a synergistic balance of antioxidant herbs and spirulina in an easy-to-feed formula designed to complement the natural diets of dogs and cats. It provides systemic support in food form that the body can freely digest and utilize. Unlike high-potency vitamin supplements that may provide more nutrients than can be used, this product will not place an added burden on the liver, kidneys or digestive system. Veterinarians report that senior animals respond well on this product.