What science says about vaping risks The Examination What Does Vaping Do to Your Lungs? Johns Hopkins Medicine E cigarettes contain hazardous substances, addictive and harmful Avoiding Tobacco Smoke and E Cigarette Aerosol Is a Key Part of Asthma Management Asthma and Allergy Foundation of America 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.