Doctoru0026#39;s Best MSM promotes joint comfort and mobility by helping maintenance of healthy connective tissuenOptiMSM, the source of MSM used in Doctoru0026#39;s Best, is a patented, highly purified form of MSMnMSM helps keep skin, hair and nails healthy by promoting the production of keratinnDoctoru0026#39;s Best MSM is available in tablet, powder, capsule and veggie cap forms supplying 250g to 1500mg MSM per servingnNon-GMO and Gluten FreenBest MSM supplies pure crystalline MSM (methylsulfonylmethane), a naturally-occuring source of organic sulfur that is easily absorbed and used by the body. Taken up from the soil by plants, MSM found in foods is largely lost during food processing, storage and cooking. MSM supports organ and joint function by donating sulfur for maintenance of healthy connective tissue. MSM helps keep skin, hair and nails healthy by donating sulfur for products of keratin, a fibrous protein. Supports joint function.