Cosequin Plus DS + MSM: Healthy articular cartilage is crucial to joint health and Cosequin plays an important role in maintaining optimal joint function. Cosequin is the only joint health supplement brand shown effective, safe, and bioavailable in published, controlled U.S. studies. Cosequin contains both glucosamine and chondroitin to replenish nutrients and improve cartilage and increase joint fluid thickness. Cosequin reduces the effects of arthritis in all joints, especially the large joints (hip, shoulder, stifle, or knee joints). Each chewable tablet contains 600 mg Glucosamine Hydrochloride, 300 mg Sodium Chondroitin Sulfate, 250 mg Methylsulfonylmethane (MSM).