ARTHRO-FLEX is formulated as a complete complex to provide nutritional support for the patient who is experiencing joint dysfunction, joint pain or cartilage degeneration. Glucosamine Sulfate is one of the primary biological chemicals that form all the major cushioning ingredients of synovial fluid and the surrounding tissues. Glucosamine Sulfate helps to make the synovial fluid thick and elastic in joints and vertebrae. ARTHRO-FLEX also contains MSM (Methylsulfonylmethane) which is a nutritional mineral that helps normalize the immune system and reduces the swelling that causes pain.