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. E Cigarettes: Know the Health Risks Department of Health Known Health Effects of E Cigarette Use Kansas Health Institute Vaping nicotine and mental health Let's Talk about VAPING for Children and Teens! Jacques Memorial School Johns Hopkins Medicine Team Proposes Ways to Regulate and Better Manage E Cigarette Use Johns Hopkins Medicine