Gly NAc Caps 1.6 grams of N Acetyl Cysteine + Glycine per Serving Myoxcience NAC is a great supplement. It's awesome stuff to support healthy lungs. NAC is a known mucolytic. That is a fancy term meaning breaking up mucus. Now, research does show that NAC The 4 Big Benefits of NAC Supplements Plus Side Effects Gene Food L Glutathione VS NAC: Differences, Similarities, and Uses The Combined Antioxidant Effects of N Acetylcysteine, Vitamin D3, and Glutathione from the IntestinalNeuronal In Vitro Model Effects of N acetylcysteine, oral glutathione (GSH) and a novel sublingual form of GSH on oxidative stress markers: A comparative crossover study. ScienceDirect