Many vapes contain not only cancer causing chemicals and heavy metals, but also huge amounts of nicotine, making it easier than ever for younger people to get addicted. Protect your lung health and Teens Are 'Juuling' At School. Here's What That Means FDA warns Juul, says it marketed vapes as less harmful than regular cigarettes without agency authorization The Washington Post Vaping Ban: Is This the Beginning of the End for Juul? GQ Evidence update on the cancer risk of vaping e cigarettes: A systematic review