Processed Food Flavoring Additive 'Diacetyl' also in Vape Chemical Free Life Some E Cigarette Flavors May Be More Harmful Than Others The Atlantic 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 Flavors without Diacetyl Nature's Flavors Chemicals in e cigarettes may put users at risk Do Crystal Bar Vapes Have Diacetyl? Vapor Shop Direct