Formaldehyde in Electronic Cigarette Liquid (Aerosolized Liquid) 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 E cigarettes 'expose smokers to more formaldehyde than regular tobacco' South China Morning Post Print and Download About Vaping Prevention Resources HHS.gov Composition of electronic cigarette aerosol Wikipedia