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 NAC & Reduced L Glutathione 120 Capsules Zenement NAC (n acetyl l cysteine) 600 mg (Pure Encapsulations) NAC vs Glutathione: Comparing Antioxidant Powerhouses for Your Health IVDrips Pure Encapsulations NAC + Glycine Glutathione Support Ghama Health Top 9 Health Benefits of NAC (N Acetyl Cysteine)