UC Davis study: Disposable vapes may be more toxic than cigarettes Years ago, vaping was thought to be a way to stop smoking. However, in the following decades other troubles come from vaping including very high levels of nicotine delivery, battery explosions PDF) Impacts of vaping and marijuana use on airway health as determined by exhaled breath condensate (EBC) They may look harmless and smell sweet but disposable vapes can release toxic metals at levels even worse than cigarettes. A UC Davis study found lead, nickel, and antimony inside