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 Glutathione Vs NAC: Which is Best for Skin? Glutathione vs. NAC for Skin: Which is Better? Kaun hai Ultimate Celebrity #glowingskin Glutathione Getting the k'NAC'k of Parkinson's disease The Science of Parkinson's The Low Down on L Glutamine for Leaky Gut Repair Jenna Volpe, RDN, LD, IFNCP, CLT Functional Dietitian and Clinical Herbalist