N acetylcysteine (NAC): from Clinical to Anti Aging Mitochon 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 Glutathione: Master Antioxidant, Reducing Oxidative Stress, and Detoxification Exploring the Evidence of N Acetyl Cysteine (NAC) for Mood Disorders Psychopharmacology Institute Glutathione vs. NAC: Why You Should Take NAC for Better Absorption