The Dangers of Vaping and Oral Nicotine Use Among Youth Dangers of Vaping: Why E Cigarettes Are Harmful to Health Infographic: E cigarettes & Cardiovascular Disease World Heart Federation 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. Vaping Forward South Bronx Coalition E Cigarettes and Vaping Tear Pad Health Edco