Troubling Case Links Vaping to Aggressive Lung Cancer The research looked at the chemical composition of "vape smoke" and assessed its cancer risk using data from published animal studies. Read more French watchdog flags heart, lung and cancer risks as vape use grows RFI 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,