Study: Potent sweetener neotame found by researchers in popular vapes Study: Partial Flavor Ban on Vapes Had Addiction Consequences for American Students UW CTRI UWMadison A new study from UC Davis found that disposable vapes have much higher concentrations of heavy metals like lead and nickel than traditional cigarettes. CBS Evening News Facebook Deconstructing contemporary disposable vapes: A material and elemental analysis ScienceDirect Tobacco is Changing: E Cigarettes Wisconsin Department of Health Services