Volkow, the director of the National Institute on Drug Abuse, It is urgent that teens understand the possible effects of vaping on overall health, the development of the teen brain and the potential for addiction. Vaping May Lead to Use Of Other Substances In 2014, the New England Journal of Medicine published a study on teen e-cigarette use, written by husband-and-wife team Eric and Denise Kandel, who are the originators of the "gateway drug" hypothesis
With fewer people lighting up in wealthy nations, nearly 80 percent of the worlds 1 billion smokers live in low- and middle-income countries
In contrast, EC-only users had a 40% lower risk of symptom worsening compared to dual users, though the likelihood of symptom improvement was not significantly different
The survey also found that 30.7 percent of teenagers who used e-cigarettes started smoking within six months
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