E cigarette flavors are toxic to white blood cells, warn scientists Eliminating Tobacco Use in Washington Kids American Heart Association Why Isn't More Known About the Harmful Nature of Vaping? Pittman, Roberts & Welsh, PLLC Vaping exposes user to harmful levels of particulate matter, study suggests CUNY Graduate School of Public Health & Health Policy While vaping is not risk free, it is less harmful than tobacco Our World in Data 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.