Is the Increase in Teen Vaping Affecting Lung Cancer Rates? Cancer Therapy Advisor What Does Vaping Do to Your Lungs? Johns Hopkins Medicine 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. Adverse outcome pathway (AOP) framework for predicting toxic mechanisms in E cigarette induced lung injury ScienceDirect