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, What Does Vaping Do to Your Lungs? Johns Hopkins Medicine Teen Vaping: What Parents Can Do Children's Hospital Colorado 5 Vaping Facts You Need to Know Johns Hopkins Medicine Is smoking or vaping worse for you? It depends who's asking BBC Science Focus Magazine Almost one million Brazilians regularly use e cigarettes : Revista Pesquisa Fapesp