Print and Download About Vaping Prevention Resources HHS.gov Vapes don't produce harmless water vapor. They can contain addictive nicotine, cancer causing chemicals like acetaldehyde and formaldehyde, as well as heavy metals that don't belong in your body. Live Vape Free is Is Formaldehyde in Vapes? Sikary Vape Official Website E cigarette vapor has cancer causing chemical formaldehyde CBS News Nicotine Vapes: the Chemicals They Contain, What They Can Do to You Business Insider