In a nationally representative study of 162,532 US 8th, 10th, and 12th graders, dose-dependent associations between cannabis use frequency and adverse academic, impulsivity, and emotional outcomes were observed even among monthly users, with stronger effects in those under 16.
Parents, school counselors, pediatricians, and policymakers concerned about adolescent cannabis use.
Even monthly use linked to worse outcomes; stronger effects under age 16
What the researchers found
Compared to non-users, even noncurrent and monthly cannabis users had greater odds of poor academic performance (aOR 1.30-2.20), poor impulsivity and self-regulation (aOR 1.26-2.19), and adverse emotional states (aOR 1.1-1.42). A consistent dose-response trend was observed across all adverse categories except low social engagement. Younger users (<16) showed greater susceptibility.
Why it matters
Published in Pediatrics, this study challenges the notion that occasional cannabis use is harmless for teens. The dose-response pattern starting at monthly use and the heightened vulnerability of younger adolescents strengthen the case for early prevention.
The numbers in context
162,532 respondents. Mean age 16.0. 26.2% cannabis users: 4.6% near-daily, 3.6% weekly, 4.8% monthly, 13.2% noncurrent. Effect sizes: academic (d=0.39-0.44), impulsivity (d=0.43-0.55), emotional (d=0.33-0.40), social engagement (d=0.03-0.18). Younger users (<16) showed greater susceptibility for academic and emotional indicators.
How the study worked
Cross-sectional analysis of 162,532 respondents from the 2018-2022 Monitoring the Future surveys (US nationally representative 8th, 10th, and 12th graders). Cannabis use frequency categorized as nonuse, noncurrent, monthly, weekly, and near-daily. Demographically adjusted odds ratios calculated for cognitive, social, and emotional indicators.
What this study cannot tell us
Cross-sectional design cannot establish causality. Associations may reflect pre-existing differences between users and non-users. Self-reported cannabis use may be underreported. Effect sizes were small to moderate. Survey cannot capture cannabis potency or product type.
How to read the evidence
Strong: very large nationally representative sample across multiple years with dose-response analysis, published in Pediatrics.
When this study was published
Published 2026. Data from 2018-2022.
The bigger picture
This is one of the largest studies examining dose-dependent cannabis effects in adolescents. The finding that even low-frequency use is associated with measurable differences, combined with greater vulnerability in younger teens, supports age-based prevention messaging.
Questions still open
- Do the associations reflect cannabis effects or pre-existing vulnerability? Would longitudinal tracking of the same individuals show worsening trajectories? How do product type and potency modify these associations?
Common questions
Is occasional cannabis use harmful for teenagers?
Are younger teens more affected by cannabis?
Read the original research
Cannabis Use Among US Adolescents.
Pediatrics, 157(1)
Citation
Sultan, Ryan S; Zhang, Alexander W; Becker, Timothy D; Sethaputra, Panijaya; Simon, Kevin M; Huang, Yiting; Levin, Frances R; Levy, Sharon; Olfson, Mark. (2026). Cannabis Use Among US Adolescents.. Pediatrics, 157(1). https://doi.org/10.1542/peds.2024-070509
Explore the wider topic
- How to Talk to Your Teenager About Weed (Without Losing Them)
- My Kid's Friends Smoke Weed: A Parent's Guide
- I Smoke Weed But Don't Want My Kids To: Navigating the Hypocrisy
- Quitting Weed as a Parent: Why It Is the Hardest and Most Important Quit
- Quitting Weed as a Teen or Young Adult
- My Kid Is Smoking Weed: A Parent's Guide