E cigarettes 'expose smokers to more formaldehyde than regular tobacco' South China Morning Post 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 Print and Download About Vaping Prevention Resources HHS.gov High Levels of 'Hidden' Formaldehyde Found in E Cigarettes Promises Behavioral Health