All About NAC (N acetylcysteine): What it is and what benefits it has Zenement NAC vs. Glutathione and How They Work Invigor Medical Chemical structures of N acetyl L cysteine, L cysteine and Download Scientific Diagram 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