Liver flavor chewable tablets provide high levels of ingredients that help maintain healthy joint function in dogs with a previous injury or over 9 years of age. Hip & joint level 3 liver flavor chewable provide 500-mg of glucosamine, 400-mg of chondroitin, 50-mg msm, and 6-mg of hyaluronic acid to help maintain healthy canine joint function and connective tissue. This product is formulated especially for large and elderly dogs with long-standing joint problems. Glucosamine hcl is the key building block for making cartilage. Recent reports in veterinary journals have validated the benefits of glucosamine in maintaining joint health and supporting mobility and activity in dogs of all ages and sizes. Chondroitin sulfate protects existing cartilage and slows its break down. Methysulfonylmethane (msm) is a natural anti-inflammatory agent that provides sulfur essential in the formation of cartilage. Hyaluronic acid helps maintain the viscosity of joint fluid. Vitamin c (ascorbic acid) is a potent antioxidant that is also important for the formation of bone and cartilage. Manganese, copper and zinc are essential in biochemical reactions that help form cartilage. Specifically formulated for dogs over 9 years of age or those requiring added joint support. Directions for use: one-half chewable per 40-pound. Of body weight twice daily.