N-Acetyl-L-Cysteine is a powerful antioxidant which has also been shown to increase glutathione levels. Glutathione synthesis in the liver has an important function in metabolic clearing. NAC is highly absorbable and supplies the body with bioavailable Lcysteine, the limiting amino acid in new glutathione synthesis. Glutathione is both an antioxidant and a chelator of toxins, important for metabolic clearing. NAC is highly absorbable and stable to oxidation, which makes it an excellent way of increasing the body´s stores of reduced glutathione.Ingredients for Nutri N-Acetyl-L-Cysteine (NAC):One capsule of Nutri N-Acetyl-L-Cysteine (NAC) provides: N-Acetyl-L-Cysteine (NAC) 500 mg Other Ingredients: Ascorbyl Palmitate, Microcrystalline Cellulose, Vcaps (Hypromellose-HPMC & water) Directions for use of Nutri N-Acetyl-L-Cysteine (NAC): 1 capsule three times daily, after meals, or as directed.