NAC is a precursor to glutathione, a critical antioxidant scientifically proven to scavenge free radicals. NAC has the unique ability to maintain healthy lung tissue, support the body's natural defences and enhance cellular health and longevity. These qualities make NAC especially beneficial for active people, the elderly and those exposed to polluted environments. Medicinal IngredientsNon-Medicinal IngredientsRice powder, vegetarian capsule (carbohydrate gum [cellulose], purified water), vegetable grade magnesium stearate (lubricant).N-acetyl-L-cysteine (NAC) is a highly stable form of cysteine and is a precursor in the body to the critical antioxidant glutathione. It provides antioxidant support and is especially beneficial for active people, the elderly, and those exposed to polluted environments. Antioxidant for the maintenance of good health. Helps reduce oxidative stress during exercise, support immune function, and relieve symptoms of chronic bronchitis.