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, Vaping and the Risks of Severe Lung Disease Canyonlands Healthcare E Cigarette or Vaping Associated Lung Injury New England Journal of Medicine Health Effects of Smoking on Your Body Vaping May Increase Respiratory Disease Risk by More Than 40 Percent SPH Cardiopulmonary Impact of Electronic Cigarettes and Vaping Products: A Scientific Statement From the American Heart Association Circulation