Public Health Consequences of E Cigarettes E cigarettes: 'cancer risk close to zero' Bhekisisa Want to quit smoking? Vaping is not the answer 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. 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. No, vapes aren't 95% less harmful than cigarettes. Here's how this decade old myth took off