MSM (methylsulfonylmethane, dimethyl sulfone, DMSO2) is a naturally occuring thiol compound and one of the most popular dietary supplements. MSM is 34% elemental sulfur and has a metabolic relationship with methionine, and is found in small amounts in the diet in sources including milk, grains, meat, eggs, fish, fruit, tea, coffee, and raw vegetables. Methylsulfonylmethane [...]