glucosamine, chondroitin, hyaluronic acid, msm (glucosamine, chrodroitin msm) is a glucosamine supplement, chondroitin sulfate and msm or methylsulfonilmethane, which helps improve bone and joint health, including muscles. It allows greater elasticity of the joints and a bone reinforcement, which are important at a more advanced age or even in the case of Desportis tas.