Health warning issued: Vaping linked to irreversible condition known as popcorn lung Doctors are now urging users to take the risk seriously before it's too late Full story and medical A Kernel of Truth: Diacetyl, Popcorn Lung and E Liquids Dinner Lady 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 Geek Bar Ingredients List Full Breakdown by Flavor (2026) VapeDeal.com