WHAT IS MSM (METHYL-SULFONYL METHANE)? MSM, full name Methyl-Sulfonyl Methane, is an organosulphur compound that can be found naturally in humans, animals & plants. MSM is used as a sulphur donor to make other chemicals within the body & is often combined with Glucosamine & Chondroitin. BULK POWDERS™ MSM (Methyl-Sulfonyl Methane) is comprised of 100% MSM powder. A quic…[1000]