Is vaping safer than smoking? A pulmonologist weighs in. A Kernel of Truth: Diacetyl, Popcorn Lung and E Liquids Dinner Lady Diacetyl in Vape Juice: The Facts We Know Pod Salt UK From Randy Delatte Parish President Parents, comsidet teaching your kids this. Ever heard of popcorn lung? Most teens haven't. But it's real and it's connected to a chemical called diacetyl, still The Health Risks of Vaping 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.