MSM by OstroVit is a preparation that serves as a source of methylsulfonylmethane, an organic sulfur compound. This compound naturally occurs in many fruits, vegetables, eggs, meat, tea, cereals, and even fresh cow's milk. It loses its properties due to freezing, irradiation, and preservation.

Sulfur is the most commonly found inorganic element in our body after calcium and phosphorus. Sulfur plays an extremely important role in the synthesis of amino acids, enzymes, immunoglobulins (antibodies), and glutathione - an intracellular antioxidant that protects cells from free radicals.