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: Decoding What's Behind The Vapor Vaping Electronic cigarette use increasing among Airmen > Hill Air Force Base > Article Display Health risks of e cigarettes emerge E Cigarettes and Vaping OHSU