A Kernel of Truth: Diacetyl, Popcorn Lung and E Liquids Dinner Lady Do Crystal Bar Vapes Have Diacetyl? Vapor Shop Direct Community Request Diacetyl Center for Research on Ingredient Safety Vape Juice Without Diacetyl Freeman Vape Dr Farsalinos E Liquid Study Finds Diacetyl Present DYK? Vaping coats lungs with potentially harmful chemicals. This can include chemicals such as: Diacetyl: This food additive, used to deepen e cigarette flavors, is known to damage small passageways in the lungs.