Trends in long term vaping among adults in England, 2013 23: population based study The BMJ Vapes are harmful and can be highly addictive. Some disposable vapes have nearly tripled in nicotine strength in the span of only 5 years. Disposable vapes are more toxic than cigarettes, contain lead: Study The Synthetic Nicotine Loophole Fueling a Return to Teenage Vaping The New York Times Disposable E Cigarettes More Toxic Than Traditional Cigarettes UC Davis Study links youth vaping to increased metal exposure, raising public health concerns