Teen Vaping Increases Nicotine Levels, Study Finds

A new study published in *JAMA Psychiatry* reports a dramatic rise in nicotine exposure among U.S. teenagers, with average urine levels of the nicotine metabolite cotinine nearly tripling over a span of just a few months in late 2024. The research, which tracked urinary cotinine concentrations in a large cohort of adolescents, found that the increase coincided with a surge in the use of vape devices that deliver higher nicotine concentrations. The data suggest that teens are now receiving heavier doses of nicotine than previously recorded, raising concerns about the potential for increased addiction and adverse health effects.

The study’s authors point out that the rise in cotinine levels reflects both greater frequency of vaping and the availability of products containing higher nicotine content. They note that the pattern aligns with recent regulatory changes that have expanded the market for flavored and high‑nicotine e‑liquids, which are particularly appealing to younger users. While the research did not directly assess clinical outcomes, the authors emphasize that sustained high nicotine exposure during adolescence can interfere with brain development and increase the risk of long‑term dependence.

Health experts caution that the findings underscore the need for stricter controls on nicotine concentrations in vape products and more robust public‑health campaigns targeting youth. The study’s authors call for further research to monitor the long‑term consequences of heavy nicotine exposure in this vulnerable population, while policymakers consider measures to curb the accessibility of high‑nicotine vaping devices to minors.