Smoker lungs aren't a lost cause. NAC and mullein leaf is the stack nobody talks about. NAC thins mucus and bumps glutathione back up. Mullein calms inflamed airways so the morning cough Optimum Health GSH+: The Best Defense Against Smoke Damage and Lung Irritation Frontiers Inhibiting lung lining fluid glutathione metabolism with GGsTop as a novel treatment for asthma Glutathione Treatments: Part 2 Treating Common Health Conditions with GSH BioDesign Wellness Center Glutathione responsive biodegradable polyurethane nanoparticles for lung cancer treatment ScienceDirect Lung glutathione adaptive responses to cigarette smoke exposure Respiratory Research Springer Nature Link