High concentrations of flavor chemicals are present in electronic cigarette refill fluids Scientific Reports 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 and Vaping OHSU What's really inside a vape? Many people think vaping is just flavored vapor, but the aerosol from e cigarettes can contain harmful substances that go straight into the lungs. According to the JUUL E Cigarettes Harrison County Health Department How Many Teens Using E cigarettes Show Evidence Of Same Toxic Chemicals As Smokers: Study ABC News Australia Dangerous Chemicals In Vapes Listed