Popcorn Lung: The Deadly Secret in Your Vape! Did you know that the sweet, tempting flavor in your e liquid could be hiding a chemical called Diacetyl? This chemical, which tastes All About Vaping Frontiers Diacetyl and Other Ketones in e Cigarette Aerosols: Some Important Sources and Contributing Factors Risk assessment of inhaled diacetyl from electronic cigarette use among teens and adults ScienceDirect