Antioxidant Therapy for Idiopathic Pulmonary Fibrosis New England Journal of Medicine 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 Benefits: Top Uses for Your Health Nutrisense Journal Nutrition, Lifestyle, and Environmental Factors in Lung Homeostasis and Respiratory Health A Literature Review of Glutathione Therapy in Ameliorating Hepatic Dysfunction in Non Alcoholic Fatty Liver Disease Lung glutathione adaptive responses to cigarette smoke exposure Respiratory Research Springer Nature Link