The mechanism of action of N acetylcysteine (NAC): The emerging role of H2S and sulfane sulfur species ScienceDirect NAC vs Glutathione: Comparing Antioxidant Powerhouses for Your Health IVDrips N acetylcysteine, the critical precursor for glutathione synthesis 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 NAcetylcysteine (NAC) is More Than Just an Antidote. NAC replenishes glutathione (GSH), breaks mucus disulfide bonds, and modulates glutamate. That's why it works in the liver, lungs, and brain. Owais Acetylcysteine Antioxidant & Mucolytic Agent APExBIO