It may look trendy, but vaping is silently damaging your lungs. Behind the flavored puffs lie chemicals like diacetyl known to scar and narrow your airways permanently. The damage leads Dynamic Chemistry and Toxicity of E Cigarette Aerosols and Their Product Waste Chemical Research in Toxicology Common e cigarette chemical flavorings may impair lung function Harvard T.H. Chan School of Public Health Some e cigarettes contain chemicals that cause popcorn lung Vox