Metals found in disposable e cigarette vapor could pose health risks American Chemical Society Study: Potent sweetener neotame found by researchers in popular vapes How disposable vapes have become a prominent part of young people's lives UEA Disposable vapes spew toxic metals at higher levels than cigarettes, study finds Disposable vapes are more toxic than cigarettes, contain lead: Study China e cigarette titan behind 'Elf Bar' floods the US with illegal vapes Reuters