The Anatomy and Chemistry of a Disposable Vape Covalent MAHSC funded study reveals vaping's impact on young people's physical fitness Health Innovation Manchester Turns out the disposable nicotine delivery systems are, as suspected, worse than the real thing, according to a new study from researchers at UC Davis. Disposable Vapes Release Toxic Metals, Lab Study Says Disposable E Cigarettes More Toxic Than Traditional Cigarettes UC Davis