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 Chemical structures of N acetyl L cysteine, L cysteine and Download Scientific Diagram Genetic differences for NAC vs glutathione supplements? All About NAC (N acetylcysteine): What it is and what benefits it has Zenement NAC vs Glutathione: Comparing Antioxidant Powerhouses for Your Health IVDrips