F.D.A. Opens Door to More Flavored E Cigarettes The New York Times New Study Highlights Risks of Metals (lead, nickel, and antimony) in Disposable E cigarettes UC Davis Poulin Research Group Disposable vapes are more toxic than cigarettes, contain lead: Study Vaping as a teenager is a gateway to smoking, study suggests Bigger, stronger, and cheaper: Disposable e cigarettes have more nicotine and are more accessible than ever