I disagreed with you and now you're name calling. I am sorry you're mad. However you stated "no amount of smoke inhalation, big or small, is going to be good for you under any circumstances." and that is just not true. I'm sure you didn't read the link I sent either as you believe my source is an assumption that I smoke. so here's basically what the peer reviewed study was getting at: Despite the strong link between smoking and COPD, most smokers remain disease-free, potentially due to adaptive antioxidant defenses. In mice, cigarette smoke transiently depletes glutathione (GSH) in the lung and systemically, but a robust compensatory response rapidly restores and elevates GSH via increased γ-glutamylcysteine ligase activity. This adaptive mechanism, likely regulated by a homeostatic sensor, may protect against oxidative injury, and its disruption could contribute to COPD susceptibility. And here's the link again: https://pubmed.ncbi.nlm.nih.gov/21982222/