Pediatritians suggest parents talk to their kids about electronic cigarettes, as well as how dangerous nicotine is.

Nicotine in electronic cigarettes may be responsible for turning teens into regular smokers and vapers.

Researchers surveyed 181 high school students from Los Angeles who vaped. Those who used e-cigs with higher plant toxin concentrations were more likely to keep smoking e-cigs and regular tobacco cigarettes later on, according to a study published today in JAMA Pediatrics.

Studies have shown that young people who vape are more likely to pick up the smoking habit. But why this happens isn’t entirely clear. Today’s study shows that tobacco concentrations may play a role.