The Dangers of Vaping How E Cigarettes Affect Student Health Emerging Phenomenon of Electronic Cigarettes Page 3 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 and Eco Consequences Frontiers Direct health implications of e cigarette use: a systematic scoping review with evidence assessment