Do Crystal Bar Vapes Have Diacetyl? Vapor Shop Direct Chemicals in e cigarettes may put users at risk Risk assessment of inhaled diacetyl from electronic cigarette use among teens and adults ScienceDirect E cigarette users could be at risk from dangerous 'popcorn lung' disease, Harvard research finds The Independent The Independent Does Vaping Cause Popcorn Lung? Africa Harm Reduction Alliance Does Diacetyl In Vaping Cause Popcorn Lung? SMOKO E Cigarettes