Disposable E Cigarettes More Toxic Than Traditional Cigarettes UC Davis New study finds disposable vaping devices more toxic than traditional cigarettes How harmful are electronic cigarettes? Vapes are harmful and can be highly addictive. Some disposable vapes have nearly tripled in nicotine strength in the span of only 5 years. Vaping exposes users to toxic metals like lead and uranium, study says AOL Deconstructing contemporary disposable vapes: A material and elemental analysis ScienceDirect