Vaping, Diacetyl, and Popcorn Lung: Is the Threat Real? 1 in 3 teens who vape say they get e cigarettes online, including through social media apps. (PMC study) Parents: Monitor online activity, start the conversation, and stay informed. Learn more at 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 A Warm, Buttery Flavor and a Risk of Irreversible Lung Damage