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 LCS3 is a Glutathione Disulfide Reductase (GSR) and TXNRD1 Inhibitor Network of Cancer Research Glutathione peroxidase 3 localizes to the epithelial lining fluid and the extracellular matrix in interstitial lung disease Scientific Reports Targeting maladaptive glutathione responses in lung disease ScienceDirect Amazon.com: Powerful Lung Detox & Cleanse Mullein, Chlorophyll, Zinc Respiratory Support with Glutathione for Smokers & Vapors Easy Breathing by NDCO : Health & Household Glutathione, CoQ10 & Collagen for Lung Health Malook