Disposable E Cigarettes More Toxic Than Traditional Cigarettes UC Davis Vaping has been marketed as a healthier alternative to smoking. But, do you actually know what is in your vape? Turns out vapes contain heavy metals, cancer causing agents, and so many more Disposable vapes are more toxic than cigarettes, contain lead: Study Vaping: High lead and nickel found in illegal vapes BBC News Vaping exposes users to toxic metals like lead and uranium, study says