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, Can vaping cause cancer? The evidence suggests it might. The Washington Post Vaping may not contain tobacco, but that doesn't mean it's harmless. E cigarettes still expose your lungs to nicotine and a mix of chemicals that have been linked to lung disease, heart issues, Vaping and the Brain: Effects of Electronic Cigarettes and E Liquid Substances The Journal of Neuropsychiatry and Clinical Neurosciences Health Issues What's the Harm? Texas DSHS