Vaping releases toxic chemicals, including heavy metals, as well as ultrafine particles that go deep into the lungs. These increase the risk of heart and lung disorders. The hidden dangers of vapes: Study reveals chemicals, risks and teen use Vaping and Electronic Cigarette (E Cigarette) Products Cattaraugus County Website Not just water vapor: why e cigarettes are so dangerous PUBLIC HEALTH INSIDER E Cigarettes and Vaping OHSU Gasping for Action A Watchdog Report Lab tests reveal popular e cigarette liquids contain harmful chemicals