MSM, a metabolite of DMSO (dimethylsulfoxide), is a naturally-occurring component of every living cell. MSM is a bioavailable form of sulfur, which is necessary for the proper function of the body's skin, hair, nails connective tissue, amino acid production, immune system, and healthy joints.* Sulfur is considered a macronutrient and must be consumed each day for healthy function and growth of the body.*