MSM, methylsulfonylmethane (METH-əl-sul-FON-il-METH-ane) also known as dimethyl sulfone (DMSO2) and methyl sulfone, is an organic sulfur-containing compound important for optimal health.
MSM is made up of 34% sulfur—the fourth most abundant mineral in the human body. Sulfur is a core chemical element necessary for biochemical functioning and an elemental macronutrient for all organisms. Sulfur is also a vital building block of amino acids and connective tissue including joints, cartilage, skin, hair, and nails. MSM also provides methyl groups, which support many essential metabolic processes in the body.
Primarily marketed and sold as a dietary supplement, studies suggest MSM provides a variety of health benefits.