Oli-Vet Olive Leaf Extract 500 mg (120 tablets) Supplement for dogs to support immune system health Eliminates microorganisms which may support its use in almost any type of microbial invasion Olive Leaf Extract also contains a natural complement of bioflavanoids like Quercetin and Rutin that are antioxidants In addition, Olive Leaf Extract promotes circulatory health and is an antioxidant Oli-Vet is an extremely effective, all natural and safe supplement