TRI-ACTA assists in creating a healthy joint environment by combining glucosamine and chondroitin in forms demonstrated to be active with MSM in the treatment of degenerative joint disease, arthritis and ailments associated with hip dysplasia.TRI-ACTA is a combination of Glucosamine, Chondroitin and MSM, when blended together, have a synergistic effect that enhances the synthesis of new cartilage, muscle tissue and ligaments. The synthesis of new cartilage treats the cartilage matrix at the cellular level, and allows the body to heal itself. TRI-ACTA H.A. Maximum Strength with Hyaluronic Acid TRI-ACTA H.A. adds Hyaluronic Acid to our popular TRI-ACTA formula to give your dog even greater results. Combined with Glucosamine, MSM and Chondroitin Sulphate, TRI-ACTA H.A. is a comprehensive joint supplement helping to ensure sound joint function.