Health effects of electronic cigarettes Wikipedia Myth: Vaping is harmless. Fact: Vapes contain nicotine and other chemicals that can harm your lungs and make it harder to quit for good. In California, vapes are now one of the 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, Vapes, and other Electronic Nicotine Delivery Systems (ENDS) FDA