A Kernel of Truth: Diacetyl, Popcorn Lung and E Liquids Dinner Lady Vapes are clouded in misconception . They contain many of the same toxic and cancer causing chemicals found in regular cigarettes. One of these ingredients is diacetyl, used in popcorn flavourings for its 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. worried about the Popcorn Lung diacetyl rumour (please read) Vaping Forum Planet of the Vapes BREAKTHROUGH NEWS: Doctors just announced that vaping has been conclusively linked to permanent lung disease. Sadly, many teens have already been diagnosed. Diacetyl, or 2,3 butanedione, is a flavouring agent that becomes a