PDF) Impacts of vaping and marijuana use on airway health as determined by exhaled breath condensate (EBC) A new study from UC Davis found that disposable vapes have much higher concentrations of heavy metals like lead and nickel than traditional cigarettes. CBS Evening News Facebook Flavored tobacco sales restrictions and e cigarette use among California high school students Disposable e cigarettes more toxic than traditional cigarettes EurekAlert! 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 UC Davis study: Disposable vapes may be more toxic than cigarettes