What is MSM? MSM stands for methylsulphonylmethane and is a suphur derivative. MSM keeps tissue soft and assists in keeping elastin in our skin. Elastin or the elasticity in our skin breaks down as we age. Some recent studies also have shown that MSM is helpful for certain kinds of melasma. The sulphur in this supplement also helps the body create keratin, which creates stronger nails and hair. What a wonder pill!! As always, check with your primary care provider before adding any new supplement to your diet.