E-cigarettes are battery powered devices that turn a liquid containing nicotine into vapor that’s inhaled. They are billed as an alternative to real tobacco products. But a new study in the Journal of The American Medical Association shows teens who use e-cigarettes are more likely than others to take up smoking cigarettes and other tobacco products later on.

            Dr. Stephen Thornton, a toxicologist at The University of Kansas Hospital, isn’t surprised by the study, and says much more research is needed before deciding whether minors should be allowed to use them.

            In the video below, he talks about whether e-cigarettes are an alternative to regular cigarettes, whether they’re dangerous, the problem with the refills not being regulated, why more research is needed, and whether he’d let his own children use them.