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. How safe are e cigarettes? FDA hazy on e cigarettes' safety CNN.com Don't Go Up in Smoke: E Cigarette Safety Electrical Safety Foundation International Don't Assume E Cigarettes Are Safe: What You Need to Know Before Vaping