Bonne Vap Hauconcourt Magasins DO YOU KNOW ABOUT VAPING? Alerting to the Dangers of E Cigarettes : Johns Hopkins Center for Innovative Medicine The Dangers of Vaping: Six Facts to Know Holland Hospital Scripps Health E cigarettes remain the most commonly used tobacco product among middle and high school students in the United States, according to the Instagram 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.