E Cigarette Market Size, Industry Analysis, Share, Forecast 2034 5 Vaping Facts You Need to Know Johns Hopkins Medicine How Much Nicotine Is in a Geek Bar? Strength & Content Guide Exposure to e cigarette advertising and young people's use of e cigarettes: A four country study Nicotine is especially addictive for young people and can make it harder to learn and focus. Nicotine withdrawal can worsen stress and mental health symptoms. Learn more about the risks of vaping