Stop Smoking E Cigarettes CardioSmart American College of Cardiology The evidence is clear: Young E cigarette users suffer from respiratory symptoms American Lung Association E cigarettes: Facts, stats and regulations 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: How they work, risks, and research Express Tobacco Blue E Cig 45 Pack VaporFi