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 Experts show that flavored e cigarettes cause irreversible lung damage. A U.S. teen developed "popcorn lung" after secretly vaping for 3 years a permanent, life altering disease. Officially known as bronchiolitis obliterans, the Can vaping damage your lungs? What we do (and don't) know Harvard Health Does Vaping Cause Lung Cancer? Which Vapes Cause Popcorn Lung Popcorn Lung Symptoms You Can't Ignore Australia How To Identify Popcorn Lungs