Print and Download About Vaping Prevention Resources HHS.gov Formaldehyde in Electronic Cigarette Liquid (Aerosolized Liquid) E cigarettes can emit formaldehyde at high levels under conditions that have been reported to be non averse to users Scientific Reports E cigarettes examined: Do they contain formaldehyde? Formaldehyde exposure from 3 e cigarette formats tested well below WHO quality guidelines EurekAlert! Is Formaldehyde Contained in Vapes?