Cosequin Standard Strength contains glucosamine hydrochloride and methylsulfonylmethane (MSM), in a bottle of 75 tasty, chewable tablets. These ingredients work to support your pet's joint health. Cosequin joint health supplements are brought to you by Nutramax Laboratories Veterinary Sciences, the #1 veterinarian recommended supplement company. ▼Source: Among retail brands. Survey conducted among small animal veterinarians who recommended oral joint health supplements. *Source: Survey conducted among small animal veterinarians who recommended animal supplements.