Health effects and known pathology associated with the use of E cigarettes ScienceDirect 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. Your Body Immediately After Vaping an E Cigarette While vaping is not risk free, it is less harmful than tobacco Our World in Data Ban on vaping: reality check or turf war? RTD