Swanson Glucosamine, Chondroitin & MSM is a powerhouse formula dedicated to meet your joint health needs. This three-in-one formula combines the cartilage-building nutrition of glucosamine and chondroitin with the additional support of MSM (methylsulfonylmethane), a high-bioavailability source of organic sulfur, which is an essential mineral for tendons, ligaments and other vital joint tissues.