Psychiatry.org Vaping is Unhealthy. Tips and Resources to Help Quit. 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. Scripps Health E cigarettes remain the most commonly used tobacco product among middle and high school students in the United States, according to the Instagram E Cigarettes & Vaping, Chemical Safety Chemical Insights