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 Frontiers Glutathione: A Samsonian life sustaining small molecule that protects against oxidative stress, ageing and damaging inflammation Levels of Reduced Glutathione (GSH) in Plasma and Lungs of Control and Download Table JCI Insight Attenuation of lung fibrosis in mice with a clinically relevant inhibitor of glutathione S transferase Glutathione S transferases and their implications in the lung diseases asthma and chronic obstructive pulmonary disease: Early life susceptibility? ScienceDirect