Vaping is often marketed as a safer alternative to smoking, but many vape products contain nicotine, harmful chemicals, and heavy metals that can harm developing brains and lungs. E Cigarettes, Vapes, and other Electronic Nicotine Delivery Systems (ENDS) FDA How Many Teens Using E cigarettes Show Evidence Of Same Toxic Chemicals As Smokers: Study ABC News Australia Dangerous Chemicals In Vapes Listed E Cigarettes and Vaping OHSU