 There is plenty of evidence that many smokers use vaping to reduce or quit smoking. In fact, adolescent smoking has continued to fall as adolescent vaping has increased. Another anti-vaping argument is that it has negative mental or social health consequences. Studies like electronic cigarette use and mental health, the Canadian population-based study, suffer from the same issues as studies linking vaping to future smoking. It's easy to show that vapors have more psychological and social issues than non-vapors, but that's only an association. An obvious alternative explanation is that troubled kids are more likely to vape, either as a form of self-medication, or because they have less regard for adult opinion and rules, or perhaps because they are less supervised or have less to lose by acting in a deviant way.