MSM (MethylSulfonylMethane) is an abbreviation of methylsulfonylmethane, an organic form of sulfur. The chemical formula of MSM is CH3SO2CH3. It is the form in which sulfur is biologically active and appears in nature in all living organisms.
Iodine is a trace mineral that is vital to the function of the thyroid gland. The human body does not make iodine, so all iodine intake must come from either our diet or from supplements.