HXN NAC Supplement, N acetyl cysteine, Glutathione for lungs Detox, with Vitamin C Tablet, (99% NAC Supplement) Support Immunity, Respiratory Health Supplements 60 Tablets : Amazon.in: Health & Personal Care NAC is a great supplement. It's awesome stuff to support healthy lungs. NAC is a known mucolytic. That is a fancy term meaning breaking up mucus. Now, research does show that NAC Frontiers Glutathione: A Samsonian life sustaining small molecule that protects against oxidative stress, ageing and damaging inflammation Nutrition, Lifestyle, and Environmental Factors in Lung Homeostasis and Respiratory Health Treatment of stable COPD: antioxidants European Respiratory Society