E Cigarettes (Vapes) Smoking and Tobacco Use CDC FDA clears first menthol e cigarette for adults E Cigarettes The evidence keeps piling up: e cigarettes are definitely safer than smoking Science The Guardian 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 riskfree.