What's in an E Cigarette? American Lung Association Scientists Offer New Evidence E Cigarettes Could Kill You Most e cigarettes contain nicotine, which is highly addictive. Putting maximum limits on the nicotine strength of e cigarettes, along with evidence based tobacco control strategies, may help reduce youth e cigarette use and increase quitting UK Vaping for Smoking Cessation: Evidence Based Success Stories SMOKO E Cigarettes The effect of e cigarettes on smoking cessation and cigarette smoking initiation: An evidence based rapid review and meta analysis Tobacco Product Use among U.S. Adults, 20232024 NEJM Evidence