Does Vaping Cause Popcorn Lung? Dr Farsalinos E Liquid Study Finds Diacetyl Present 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 Acetoin is a precursor to diacetyl in e cigarette liquids ScienceDirect How do I figure out if my vape juice contains diacetyl or not? : r Vaping A Comprehensive Guide of Vaping LOST MARY