Is Kojic Acid Safe During Pregnancy? Liv Hospital I absolutely love NAC (N Acetyl Cysteine) for so many reasons! Not only is it fantastic for upper respiratory issues, but it also plays a crucial role in promoting glutathione, which is known as the Glutathione: Benefits and Supplements Update on the Pathogenesis of Chronic Obstructive Pulmonary Disease New England Journal of Medicine L Glutathione VS NAC: Differences, Similarities, and Uses Lung glutathione adaptive responses to cigarette smoke exposure Respiratory Research Springer Nature Link