As I mention in my book, N acetyl cysteine (NAC) is not found in food sources, but in the body, it converts into cysteine. NAC acts as a precursor to glutathione, a powerful What Is Glutathione? A Summary of Glutathione Lifespan Research Institute N Acetylcysteine A Biochemical Triumph Office for Science and Society McGill University NAC has direct antioxidant properties on oxidant species (e.g. OH ) Download Scientific Diagram The Use and Potential Benefits of N Acetylcysteine in Non Acetaminophen Acute Liver Failure: An Etiology Based Review