What's in an E Cigarette? American Lung Association What You Should Know About E cigarettes and EVALI CASAA UK Vaping for Smoking Cessation: Evidence Based Success Stories SMOKO E Cigarettes 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