Why are disposable vapes bad for the environment? Sky News 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. Study Finds Powerful Sweetener in Vapes Marketed to Teens Powers Health Fruit flavored vapes and a nighttime dry cough what's the connection? Study: Potent sweetener neotame found by researchers in popular vapes