PureMSM Sulpher Powder (methylsulfonylmethane) is a non toxic physiologically active sulphur compound that may be Enhanceful for connective tissue, cartilage, tendons, mucous membranes, nails, hair, and skin damage and repair. PureMSM Sulpher Powder is a wonderful alternative to capsules, completely bioavailable, mixes easily with your favorite beverage. PureMSM is 99.9% pure and provides benefits other brands don’t.