Awareness of the importance of antioxidants, especially in the increasingly toxic environments in which we live, has increased demand for products that protect against the damaging effects of reactive oxygen species (ROS) such as hydrogen peroxide and hydroxyl free radicals. These free radicals can be formed by our own metabolism (oxygen to burn fuel), and from external environmental factors such as pollutants, tobacco, smoke, drugs, xenobiotics, or radiation. N-acetyl cysteine (NAC) is a very efficient way to replenish glutathione, one of the body’s most potent antioxidants, and reduce the damaging effects of ROS. Scientific study has also shown a reduction in sick leave time when NAC has been administered to those suffering from chronic bronchitis. NOW® has added the essential trace minerals of molybdenum and selenium to further enhance the antioxidant potential of this formulation.Each capsule contains:N-Acetyl Cysteine 600 mgMolybdenum (from Sodium Molybdate) 50 mcgSelenium (as L-Selenomethionine) 25 mcgNon-Medicinal Ingredients: Veg Capsule (hypromellose, water), Stearic Acid (vegetable source), Citric Acid. Adult Dosage: Take 1 capsule daily with a protein containing meal.