Identification of Cytotoxic Flavor Chemicals in Top Selling Electronic Cigarette Refill Fluids Scientific Reports Gasping for Action A Watchdog Report Lab tests reveal popular e cigarette liquids contain harmful chemicals High concentrations of flavor chemicals are present in electronic cigarette refill fluids Scientific Reports The more you know, the safer the choices you can make. E cigarettes and vape pens are not harmless. Many contain nicotine and other chemicals that can impact brain development, lung health, Disturbing Trends with E Cigarettes in Schools