Harmful Effects of Vaping Chart Health Edco Infographic: Dangers of E cigarettes & Toxicity UPMC HealthBeat Latest Cochrane Review finds high certainty evidence that nicotine e cigarettes are more effective than traditional nicotine replacement therapy (NRT) in helping people quit smoking Cochrane 5 Vaping Facts You Need to Know Johns Hopkins Medicine 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.