Frontiers Direct health implications of e cigarette use: a systematic scoping review with evidence assessment Psychiatry.org Vaping is Unhealthy. Tips and Resources to Help Quit. What Does Vaping Do to Your Brain? University of Nevada, Reno Vaping has become common, but it's important to know what you're inhaling. Many e cigarettes contain nicotine, heavy metals like nickel and lead, and chemicals that can harm your lungs and overall health. Health Effects Vaping Information, Solutions & Interventions Toolkit Stanford Medicine Anti Vape Campaign