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 NAC Capsules Optimal Regeneration Support Combination ESN Glycine and Nacetylcysteine (GlyNAC) supplementation in older adults improves glutathione deficiency, oxidative stress, mitochondrial dysfunction, inflammation, insulin resistance, endothelial dysfunction, genotoxicity, muscle strength, and cognition Nature's Fusions Brain Support Neuro Nac NAC Ethyl Ester 50mg 60 Capsules GNC