Vaping, Environmental Toxicants Exposure, and Lung Cancer Risk Controversial Study Finds Toxic Chemicals in E Cigarette Vapor E Cigarette Reviews and Rankings New study shows higher formaldehyde risk in e cigarettes than previously thought What's really inside a vape? Many people think vaping is just flavored vapor, but the aerosol from e cigarettes can contain harmful substances that go straight into the lungs. According to the Formaldehyde in e cigarettes expert responds Science Media Centre Electronic cigarette aerosol contains 6 times less formaldehyde than tobacco cigarette smoke Nicorex