Do E Cigarettes Contain Formaldehyde? VapeMountain.com La cigarette lectronique serait cancrigne, faut il avoir peur ? What's REALLY in your cigarette or vape? You're not just inhaling nicotine. Cigarettes contain arsenic, ammonia, and formaldehyde yes, the same stuff used to embalm bodies. Vapes? Heavy metals, toxic chemicals, Is Formaldehyde In Cigarettes Clearing The Air: Do Vapes Still Contain Formaldehyde Cigarettes Vs Vape Australia New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking