Vaping weed is popular, but there are many unknowns about its safety : NPR Is vaping vitamins a good idea? The Hill Many people believe that vaping is less harmful than smoking, but that's a common misconception. In fact, in addition to nicotine, vapes can contain toxic chemicals that could be linked to cancer, Vaping and Serious Illness: What You Need to Know Together by St. Jude Best of 2014: The 12 vape pens we loved the most this year, reviewed The Denver Post Evidence update on the cancer risk of vaping e cigarettes: A systematic review