Lead in Vapes: Toxic Metals Found in Disposable E Cigarettes Technology Networks A new study from UC Davis found that disposable vapes have much higher concentrations of heavy metals like lead and nickel than traditional cigarettes. Best Delta 9 THC Disposable Vape Pen At Society Plant 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