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