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 Frontiers Carbonyl Emissions in E cigarette Aerosol: A Systematic Review and Methodological Considerations E cigarettes can emit formaldehyde at high levels under conditions that have been reported to be non averse to users Scientific Reports Your vape isn't producing formaldehyde, either Vapour.com Electronic Cigarettes, E Cigs, and E Liquids for Vaping Vapour 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 Cancer Risk Boosted by Formaldehyde in E Cigarettes