E cigarettes become more common, but there is uncertainty about long term health effects RiverBender.com 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. E Cigarettes Fact Sheet Center for Public Health and Tobacco Policy The Truth About E Cigarettes: What Parents, Teens & the Public Should Know Pine Rest Newsroom