The Chemistry of Vaping Products and Cigarettes: A Comprehensive Review Issuu The Danger of Chemicals Used in Vape Liquid The Science Blog Small device. BIG impact. Vapes are NOT harmless and many contain nicotine that can hook the brain in seconds, plus chemicals and metals that can damage the lungs. The earlier Massachusetts new vaping campaign done with student input masslive.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.