It's official. Flavored e cigarettes cause permanent lung damage. And doctors are already seeing it happen. In the United States, a teenager developed something called popcorn lung after secretly vaping for three years. Harmful substances in e liquid flavorings what should you know? CHEMNOVATIC 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 E cigarettes & vaping statistics & facts Allen Carr's Easyway Diacetyl & Popcorn Lung EDGE Vaping