Glutathione deficiency of the lower respiratory tract in patients with idiopathic pulmonary fibrosis European Respiratory Society 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 Full article: Role of glutathione in immunity and inflammation in the lung Lung glutathione and oxidative stress: implications in cigarette smoke induced airway disease American Journal of Physiology Lung Cellular and Molecular Physiology American Physiological Society