Daily exposure to formaldehyde and acetaldehyde and potential health risk associated with use of high and low nicotine e liquid concentrations 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, Join the battle to end vaping! What's in a Vape? High School