MSM participates in many biochemical functions of the body, including the manufacture of amino acids, which are the building blocks of protein, a substance vital for life itself. It also provides many beneficial effects, such as nourishing the structural, immune, nervous, cardiovascular and respiratory systems, supporting the body's defense mechanisms and promoting a feeling of well being. Athletes value MSM for its soothing properties that help preserve the integrity of muscles, tendons and other connective tissues.*