Cancer Risk Boosted by Formaldehyde in E Cigarettes Some e cigarettes deliver a puff of carcinogens Vapes don't produce harmless water vapor. They can contain addictive nicotine, cancer causing chemicals like acetaldehyde and formaldehyde, and heavy metals that don't belong in your body. Live Vape Free is a text 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 Vapes? Exposing Another Chemical Scare Your vape isn't producing formaldehyde, either Vapour.com Electronic Cigarettes, E Cigs, and E Liquids for Vaping Vapour