Skin & Coat Hip & Joint Digestion Immune System Heart Zesty Paws' 5-in-1 Multivitamin Bites are delicious chewables with over 35 essential vitamins, minerals and nutrients that provide daily nutritional support for dogs of all ages, breeds, and sizes. Skin & Coat Complex: Features Cod Liver Oil, Biotin, and Vitamin E to help nourish skin for a supple and healthy appearance, while also keeping coats shiny and strong. Hip & Joint Complex: Contains Glucosamine HCL, Chondroitin Sulfate, and OptiMSM (distilled methylsulfonylmethane), a proprietary ingredient that exceeds industry standards for optimal purity. Together these powerful ingredients promote mobility and flexibility to support hip and joint health. Digestive Complex: Include Digestive Enzymes, Niacin, and a five-strain Probiotic blend at 500 million CFU per chew to encourage healthy digestion and nutrient absorption. Immune Complex: Loaded with Vitamin A, Vitamin C, and Vitamin E to provide dogs with powerful antioxidant support to maintain healthy immune system function. Heart Complex: Formulated with Folic Acid and Kaneka Q10, a pure Coenzyme Q10 compound that has been shown to promote proper blood circulation and cellular energy levels.