Frontiers Dietary supplementation with N acetylcysteine confers a protective effect on muscle and liver in lipopolysaccharide challenged piglets How Long Does It Take for NAC Supplements to Work? Body Kitchen The mechanism of action of N acetylcysteine (NAC): The emerging role of H2S and sulfane sulfur species ScienceDirect 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 The mechanism of action of N acetylcysteine (NAC): The emerging role of H2S and sulfane sulfur species ScienceDirect