Vapoter ou fumer : quel est le mieux pour la sant ? Naturacig 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 can emit formaldehyde at high levels under conditions that have been reported to be non averse to users Scientific Reports Formaldehyde levels in e cigarettes were previously 'underestimated', researchers find The Pharmaceutical Journal Cigarette lectronique vapoteuse et effets sur la sant Cancer Environnement