Vaping harms your health Cancer Institute NSW Popcorn lung: how vaping could scar your lungs for life Popcorn Lung: The Deadly Secret in Your Vape! Did you know that the sweet, tempting flavor in your e liquid could be hiding a chemical called Diacetyl? This chemical, which tastes Does Vaping Cause Lung Cancer? Can vaping damage your lungs? What we do (and don't) know Harvard Health Yes, vaping is toxic. A U.S. teen developed "popcorn lung" after secretly vaping for three years a permanent, life altering disease. Officially known as bronchiolitis obliterans, the condition scars the lungs' tiniest