Years ago, vaping was thought to be a way to stop smoking. However, in the following decades other troubles come from vaping including very high levels of nicotine delivery, battery explosions They may look harmless and smell sweet but disposable vapes can release toxic metals at levels even worse than cigarettes. A UC Davis study found lead, nickel, and antimony inside Potential health effects of electronic cigarettes: A systematic review of case reports ScienceDirect Mark Salazar Exposes Toxic Metals in Popular Disposable E Cigarettes Pharmacology and Toxicology