E cigarettes examined: Do they contain formaldehyde? Should Nicotine Warnings Be on All E Cigarettes? New Infographic Sheds Light on the Truth Behind the Vaping and E Cigarettes Newswire Should I take up e cigarettes in order to stop smoking? Vaping 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.