Gly NAc Caps 1.6 grams of N Acetyl Cysteine + Glycine per Serving Myoxcience Jarrow Formulas N A C Sustain 600 mg, Antioxidant Amino Acid, Liver and Lung Support, 60 Tablets Walmart.com 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