PureFlex Horse Joint Complex is a superior powder blend of pure ingredients for pure nutritional joint support. Each oz contains 16,500 mg MSM, 7,500 mg glucosamine HCl, 1,750 mg calcium ascorbate USP (Ester C), 1,200 mg chondroitin sulfate and 50 mg sodium hyaluronate. Recommended for horses with osteoarthritis, aging horses and all horses facing the day-to-day joint stress of athletic training, performance and competition. Dosage: 1 scoop (1/2 oz) per 1,000 lbs body wt top-dressed on the daily ration.