E Cigarettes and Vaping OHSU 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. How Many Teens Using E cigarettes Show Evidence Of Same Toxic Chemicals As Smokers: Study ABC News Australia Dangerous Chemicals In Vapes Listed Vaping and the Brain: Effects of Electronic Cigarettes and E Liquid Substances The Journal of Neuropsychiatry and Clinical Neurosciences