Top 9 Health Benefits of NAC (N Acetyl Cysteine) The mechanism of action of N acetylcysteine (NAC): The emerging role of H2S and sulfane sulfur species ScienceDirect N Acetyl Cysteine (NAC) is a powerful antioxidant that supports the body's natural detoxification and anti inflammatory pathways. It works primarily by increasing glutathione, one of the body's most important protective molecules against oxidative N acetylcysteine (NAC): from Clinical to Anti Aging Mitochon N acetyl l cysteine averts ferroptosis by fostering glutathione peroxidase 4 ScienceDirect