An ordinary form of sulfur found in living organisms. MSM Powder by NOW is a natural supplement that supports the connective tissue and bolsters heart health. Research shows it is important in the maintenance and formation of various tissue types throughout the body. Because of this. it is taken to relieve symptoms caused by arthritis. osteoporosis. cramping. headaches. scleroderma. PMS. inflammation or bursitis. Others take it to help relieve digestion pains. including ulcers and constipation.