E cigarettes can emit formaldehyde at high levels under conditions that have been reported to be non averse to users Scientific Reports 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, New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking E Cigarettes and Secondhand Aerosols Smoke Free At Home NM