First comparison of dangers of tobacco cigarettes, e cigarettes and waterpipes Known Health Effects of E Cigarette Use Kansas Health Institute Nonnicotine vapes may be marketed as safe, but many still contain chemicals, have unknown health effects, and aren't FDAregulated. Teens are using them more ofteneven alongside nicotine vapes. No ecigarette is risk free. e Cigarettes, Vaping and the Risks of Severe Lung Disease Canyonlands Healthcare