Is the Increase in Teen Vaping Affecting Lung Cancer Rates? Cancer Therapy Advisor Is vaping a safe alternative to smoking? A1AD Support 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. Disposable ecigs expose users to much higher levels of toxic metals than earlier generations of ecigs or cigarettes Stanton Glantz blog