E Cigarettes and Lung Health American Lung Association E Cigarettes: Know the Health Risks Department of Health 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. Lung cancer risks persist with e cigarette use after quitting tobacco smoking Public Health Consequences of E Cigarettes Does vaping (using e cigarettes) make a difference to our health and are there harms with second hand vaping? iHealth Facts