The evidence keeps piling up: e cigarettes are definitely safer than smoking Science The Guardian E Cigarette How E Cigarettes Work, Health Risks & Teen Use 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. E Cigarettes May Pump Out The Same Kind Of Addictive Nicotine Found In Tobacco Laden Cigarettes