Cosequin 3-Pack ASU Joint Health Supplement Formula for Horses Convenient 3pk (3900 gram) Cosequin ASU combines the proprietary formula of Cosequin with ASU and MSM for more powerful joint support for horses 2 servings contains 14,400 mg glucosamine hydrochloride and 2400 mg low molecular weight chondroitin sulfate, plus 2100 mg ASU and 10,000 mg MSM