The nutritional supplement MSM has become much more popular in recent years, and for good reason: it has helped many people with arthritis and other musculoskeletal problems, grabbing much of the spotlight away from therapies like glucosamine and chondroitin.
MSM is a naturally-occurring, organic sulfur-containing molecule with a very simple structure. It is most often found in foods like milk, coffee, tea, and tomatoes. Its function is to supply the sulfur required to make amino acids such as cysteine and methionine.
