Disposable vapes are more toxic than cigarettes, contain lead: Study Vaping exposes users to toxic metals like lead and uranium, study says The devices, popular among teens, emit lead, nickel and antimony at concentrations that may exceed cancer and neurological risk thresholds. 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 Can you vape or smoke before or after plastic surgery? Kirby Plastic Surgery