Methylsulfonylmethande is a metabolite of DMSO (dimethyl sulfoxide). Conversion to MSM from DMSO is accomplished enzymatically. Found in nature, DMSO has been used as a carrier for various compounds. The major drawback to DMSO is the associated strong odor, along with the resultant foul breath and skin irritations that result from even mild exposure to DMSO. MSM is an odorless, virtually tasteless, white crystaline substance. The key portion of MSM is the sulfur component.

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