3 In 1 Is A Triple-Action Supplement Designed For Aging Dogs. Skin, Coat & Joint Health | Neurological & Cardiac Health | Digestive & Immune Health. For Dogs | Adults And Seniors Combination Of Hyaluronic Acid, Antioxidants And Pre & Probiotics, Designed To Help : Promote Proper Digestion And Absorption Of Essential Nutrients Contribute To Healthy Immune Function Maintain Skin And Coat Health Support Joint Health Promote Joint Mobility Preserve Cardiac And Neurological Health Protect Against Free Radicals