Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA 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. New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking Vaping vs. smoking: what are the risks? Pacific Life Re Analysis suggests e cigarette use may be linked to lower rates of smoking How tobacco* impacts your health Mass.gov