Study: Teens who vape are more likely to smoke in the future UPI.com Teens Who Vape Are More Likely to Start Smoking SPH A study of 5,000 students has found teenagers who vape are more likely to have poor mental health. Experts say being curious with teenagers can help open conversations about vaping and teaching More than 2 million US teens use e cigarettes, a quarter of them daily, CDC and FDA find CNN Teen Vaping Statistics: Overview, Key Facts and Shocking Trends