Only COSEQUIN is COSEQUIN COSEQUIN Joint Health Supplement Plus MSM & HA contains FCHG49 Glucosamine Hydrochloride, TRH122 Sodium Chondroitin Sulfate, and MSM (Methylsulfonylmethane). This combination of ingredients helps maintain your dogs cartilage and connective tissue. Each tablet also contains Hyaluronic acid (HA). COSEQUIN supplements have been used since 1992 in animals to maintain joint health. COSEQUIN supplements have been shown safe, effective, and absorbable in peer-reviewed, published, controlled, U.S. veterinary studies. Each batch of COSEQUIN is subjected to stringent quality control measures and meets label claim.