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: Good Idea? Bad Idea? BU Today Boston University Vaping Forward South Bronx Coalition E Cigarettes: Know the Health Risks Department of Health Print and Download About Vaping Prevention Resources HHS.gov Health effects and known pathology associated with the use of E cigarettes ScienceDirect