Methylsulfonylmethane (MSM)

Methylsulfonylmethane (MSM) is an organic sulfur-containing, water-soluble metabolite of dimethyl sulfoxide (DMSO). It originates from plankton, which release dimethyl sulfonium salts. These salts are transformed in the ocean into the volatile dimethyl sulfide (DMS), which rises into the upper atmosphere and when exposed to high-energy ultraviolet light and ozone, is converted to DMSO and DMSO2 (MSM).