Methylsulfonylmethane msm is an organic form of sulphur readily absorbed in the body msm occurs in fresh raw plants that are involved in the natural weather cycle plankton from the ocean release organic sulphur compounds which are evaporated into rain clouds the sulphur is converted to msm in the rain cloud when it rains msm is returned to the earth where it is absorbed by plants it is increasingly difficult to find foods that contain msm as many are grown in green houses and artificially