MSM has been a source of biologically active sulphur since life began. Sulphur is easily destroyed in the food we eat. Ensuring that we get enough, may help to maintain normal joint function, natural freedom from pain and optimum health. MSM has become a number one bestseller since our customers discovered how well it helps maintain healthy, flexible joints and muscles. MSM is also excellent for maintaining strong hair and nails, and the health of the skin and respiratory system along with general well being. Higher NatureÕs MSM, an organic form of sulphur, is sourced from tree bark; most companies supply petrochemical MSM.