MSM (methyl sulphonyl methane) is a sulphur containing compound that is popular as a food supplement and for applying to the skin in creams and lotions. Involved in many important processes in the body, sulphur helps to build amino acids and supports the production of several vitamins. It is found in high concentrations in the muscles, skin, nails, hair and bones where it is needed for collagen and keratin production, maintaining strong hair and nails and the health of the skin. Sulphur is also important for healthy joints and muscles, helps maintain flexibility and permeability in the body's cells and plays a vital role in detoxification. Additionally, sulphur is needed for insulin production which is important for healthy blood sugar balance. The sulphur content of fruits and vegetables is easily reduced by cooking and long-term storage.