Diacetyl: The Hidden Chemical That Changed Vaping and Food Safety Forever SMOKO E Cigarettes Gasping for Action A Watchdog Report Lab tests reveal popular e cigarette liquids contain harmful chemicals 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 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