N Acetyl Cysteine (NAC) 1MD Nutrition N ACETYLCYSTEINE (NAC) The mechanism of action of N acetylcysteine (NAC): The emerging role of H2S and sulfane sulfur species ScienceDirect All About NAC (N acetylcysteine): What it is and what benefits it has Zenement 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 N acetyl l cysteine averts ferroptosis by fostering glutathione peroxidase 4 ScienceDirect