Tendons, ligaments, intervertebral disc and articular cartilage in joints provide movement, stability and shock absorption for the body. Joint nutritional supplements may help prevent deterioration, improve flexibility and decrease pain. MSM (methysulfonylmethane) is a naturally occurring form of organic sulfur commonly found in foods. The processing of foods destroys MSM, rendering it non-digestible. Studies suggest that MSM acts as a natural anti-inflammatory and may help reduce pain and improve function in painful osteoarthritis.