Restored CDC E Cigarettes (Vapes) Smoking and Tobacco Use CDC Most e cigarettes (vapes) contain nicotinethe addictive drug in regular cigarettes, cigars, and other tobacco products. Nicotine can harm the adolescent brain which continues developing until about New concern about e cigarettes: They make smoking seem 'normal' again Los Angeles Times One more danger of e smoking E Cigarettes Vaping with Juul & Other Electronic Cigarettes E Cigarettes Vaping with Juul & Other Electronic Cigarettes