MSM 1000 mg 240 Caps by NOW is a dietary supplement designed to replenish the connective tissue and joint cartilage in the body. This formula contains an organic sulfur known as Methylsulphonylmethane or MSM. an ingredient that occurs naturally in fresh produce. seafood and meats. Since consuming processed foods results in less naturally occurring sulfur in the body. a supplement such as MSM 1000 mg 240 Caps by NOW helps to remedy this depletion.