Researchers from the University of California San Diego reported on April 10 that local sales bans on flavored tobacco in California are associated with a reduction in youth vaping over time and do not lead to increased cigarette smoking. The findings were published in JAMA Health Forum and are based on an analysis of more than 2.8 million middle and high school students.
The issue is significant as electronic nicotine delivery systems, or e-cigarettes, have been widely used by adolescents across the United States. National data show that youth vaping peaked in 2019 when over a quarter of high school students reported using e-cigarettes, though usage has since declined. However, frequent use remains common among current users, raising concerns about nicotine dependence and long-term health risks.
To assess the impact of flavor restrictions, researchers analyzed responses from over 2.8 million students who participated in the California Healthy Kids Survey between 2017 and 2022. Students attending schools in areas with flavored tobacco bans were compared to those without such policies using a dynamic difference-in-differences design method that tracked changes over several years.
Results showed that youth vaping rates were lower where flavored tobacco bans existed: 6.2% of students reported current e-cigarette use compared to 7.7% in areas without a ban. Over time, these policies were associated with sustained declines in youth vaping rates but did not affect cigarette smoking rates among young people.
The researchers said delayed reductions may reflect how policies evolve and enforcement strengthens after initial adoption. Many jurisdictions expanded definitions or added enforcement provisions after passing their initial laws; resources for enforcement also increased after California’s statewide ban took effect following voter approval in 2022.
Giovanni Appolon, MPH, first author of the study and doctoral candidate at UC San Diego - San Diego State University Joint Doctoral Program in Public Health said: "Local policies gave us a valuable window into how flavored tobacco restrictions may influence youth behavior over time." Appolon continued: "As more jurisdictions adopt these policies, continued monitoring will help determine how enforcement, policy design and community context shape their public health impact."
