Vaping and E Cigarettes ADAPP 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 and Secondhand Aerosols Smoke Free At Home NM Health effects of electronic cigarettes Wikipedia E cigarettes contain hazardous substances, addictive and harmful 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.