UC Davis study: Disposable vapes may be more toxic than cigarettes Disposable E Cigarettes More Toxic Than Traditional Cigarettes UC Davis Disposable vapes are more toxic than cigarettes, contain lead: Study When you vape, you aren't just inhaling vapor. Vape juice also contains addictive nicotine and other toxins! #EliminateTobaccoUse and keep e cigs out of your lungs. [Source: CDC] Understanding the Hidden Health Risks of Vaping UL Research Institutes