New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking 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, Toxic Taxidermy The Real Cost Composition of electronic cigarette aerosol Wikipedia E cigarettes can emit formaldehyde at high levels under conditions that have been reported to be non averse to users Scientific Reports Cigarette lectronique Wikipdia