Your Body Immediately After Vaping an E Cigarette 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. Harmful Effects of Vaping Chart Health Edco Scripps Health E cigarettes remain the most commonly used tobacco product among middle and high school students in the United States, according to the Instagram