Most smokers wrongly believe vaping is at least as harmful as smoking UCL News UCL University College London Vaping is often marketed as a safer alternative to smoking, but many vape products contain nicotine, harmful chemicals, and heavy metals that can harm developing brains and lungs. To learn more about the health effects of vaping and asthma, visit https: bit.ly 45dizbM. 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. Want to quit smoking? Vaping is not the answer