E cigarettes contain hazardous substances, addictive and harmful 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. Health effects of electronic cigarettes Wikipedia FDA hazy on e cigarettes' safety CNN.com Juul claimed its e cigs are 'totally safe,' but the case against vaping keeps building MarketWatch Electronic Cigarettes are they safe ? Health BeatHealth Beat