MSM (Methylsulphonylmethane) is a natural form of sulfur found in all living organisms. This natural compound, researched since 1979, provides the chemical links needed to form & maintain numerous different types of tissues found in the human body, including connective tissue such as articular cartilage.* While MSM is a natural component of almost all fresh fruits, vegetables, seafood & meat, food-processing methods reduce sulfur levels, making supplementation more important than ever. NOW® MSM is tested to meet a minimum 99.7% purity level. Do not eat freshness packet. Keep in bottle. As a dietary supplement, take two tablets 1-2 times daily with meals. If intestinal gas occurs, reduce dosage. Cellulose, Stearic Acid (vegetable source), Silica, Magnesium Stearate (vegetable source) & Vegetable Coating.