Cosequin Senior Max Strength contains FCHG49 Glucosamine Hydrochloride, TRH122 Sodium Chondroitin Sulfate, and MSM (Methylsulfonylmethane). This combination of ingredients helps maintain your dog's cartilage and connective tissue. Each soft chew also contains omega-3 fatty acids to help support skin & coat health and beta glucans to provide your senior dog with immune health support. #1 Veterinarian recommended retail joint health supplement brand. Includes Beta Glucans for Immune Support and Omega-3's for Skin and Coat Health. Tasty, easy to give soft chews.