Popcorn Lung: A Dangerous Risk of Flavored E Cigarettes American Lung Association Diacetyl Popcorn Lung Lawsuit [2026 Update] Which E Juices Have Diacetyl? VanGo Vapes Popcorn lung: What is it, and who is at risk? Harvard Health Diacetyl: The Hidden Chemical That Changed Vaping and Food Safety Forever SMOKO E Cigarettes It's official. Flavored e cigarettes cause permanent lung damage. And doctors are already seeing it happen. In the United States, a teenager developed something called popcorn lung after secretly vaping for three years.