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 Popcorn Lung & Vaping: The Dangers Of Diacetyl Explained Which E Juices Have Diacetyl? VanGo Vapes A Kernel of Truth: Diacetyl, Popcorn Lung and E Liquids Dinner Lady Acetoin is a precursor to diacetyl in e cigarette liquids ScienceDirect Warning: Etomidate in Vapes Some vapes are laced with etomidate and other dangerous drugs. It can damage your brain, disrupt your heart function, and cause fatal breathing problems.