Nature's Harbor MSM Capsule 2250 mg supply a rich source of dietary sulfur. It is a naturally occurring form of Sulfur that is vital to maintaining a healthy body. The MSM sulfur compound plays an important role in the maintenance of soft and connective tissue. It helps provide proper assimilation of the amino acids Methionine and Cysteine. MSM may also help with the pain and inflammation associated with osteoarthritis and rheumatoid arthritis.