E Cigarettes: Know the Health Risks Department of Health Frontiers Direct health implications of e cigarette use: a systematic scoping review with evidence assessment Vaping and E Cigarettes ADAPP 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 are not a healthier alternative to cigarettes. They contain nicotine and many harmful ingredients that can cause cancer and heart disease. Since these products are relatively new, we don't know all Impact of vaping on respiratory health The BMJ