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. E Cigarettes and Pregnancy Maternal Infant Health CDC New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking Fast facts on the effects of e cigarettes and vaping Vaping and Electronic Cigarette Toxicity Overview and Recommendations (Project VECTOR) Intrepid Lab