Which E Juices Have Diacetyl? VanGo Vapes What vape products are still allowed under the new e cigarette policy? E Cigarettes and Vaping PPAC Central Did you know some flavored vapes contain diacetyl, a chemical linked to popcorn lunga rare, irreversible lung disease? It scars the small airways, making it hard to breathe. Symptoms can mimic Community Request Diacetyl Center for Research on Ingredient Safety