E Cigarettes and Vaping OHSU A Comprehensive Review of the Harmful Compounds in Electronic Cigarettes JUUL E Cigarettes Harrison County Health Department 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. Vaping and the Brain: Effects of Electronic Cigarettes and E Liquid Substances The Journal of Neuropsychiatry and Clinical Neurosciences