Formaldehyde in e cigarettes expert responds Science Media Centre E cigarettes can emit formaldehyde at high levels under conditions that have been reported to be non averse to users Scientific Reports Formaldehyde in Electronic Cigarette Liquid (Aerosolized Liquid) Jenna L. Ruggiero, Lindsey M. Voller, Javed A. Shaik, Sara Hylwa, 2022 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 Electronic cigarette aerosol contains 6 times less formaldehyde than tobacco cigarette smoke Nicorex