Only COSEQUIN is COSEQUIN. COSEQUIN Joint Health Supplement Plus MSM & Omega-3s contain FCHG49 Glucosamine Hydrochloride, TRH122 Sodium Chondroitin Sulfate, 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. 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.