Infographic: Dangers of E cigarettes & Toxicity UPMC HealthBeat E Cigarettes and Pregnancy Maternal Infant Health CDC 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. Frontiers Direct health implications of e cigarette use: a systematic scoping review with evidence assessment e cigarettes HSE Health and Wellbeing