While e cigarettes don't use tobacco, they're not risk free for teens. Vape juice contains nicotine and other chemicals that harm developing brains, cause lung problems and increase the risk of addiction. A Geisinger Vape Flavors and Vape Juice: What You Need to Know Johns Hopkins Medicine E Cigarettes, Vapes, and other Electronic Nicotine Delivery Systems (ENDS) FDA JUS E Liquid Wholesale VapeRanger Wholesale what is e juice