Disposable e cigarettes more toxic than traditional cigarettes EurekAlert! 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 VibeSolano According to a new study from the University of California, Davis (UC Davis), it was revealed that popular single use e cigarettes emit Instagram Disposable Vapes Release More Toxic Metals Than Traditional Cigarettes: UC Davis Study The Epoch Times New study finds disposable vaping devices more toxic than traditional cigarettes