# Study: Teen Cannabis Use Linked to Double Psychosis Risk > **Author:** Benjamin Caplan, MD (ABFM Board Certified, MA Lic. #240562, NPI: 1962722637) > **Publisher:** CED Clinic (https://cedclinic.com) > **Canonical URL:** https://cedclinic.com/teen-cannabis-use-psychosis-risk-study/ > **Published:** 2026-02-23T13:02:03-04:00 | **Last Modified / Clinically Audited:** 2026-09-28T11:14:40-04:00 > **Clinical Summary:** Explore the teen cannabis use psychosis risk revealed by a large study linking adolescent cannabis use to doubled psychotic and bipolar disorder risk. --- CED Clinical Relevance#75 Strong Clinical RelevanceHigh-quality evidence with meaningful patient or clinical significance. Mental HealthTHCPediatricsPolicy Why This MattersThis is one of the largest studies ever conducted on teen [cannabis use](https://cedclinic.com/cannabis-cardiovascular-health-insights-2024/) and psychiatric outcomes, and it reinforces that age restrictions and youth prevention should be central to any legalization framework. Clinical Summary A JAMA Health Forum study of 463,396 adolescents ages 13 to 17 found cannabis use was linked to a twofold increase in psychotic and [bipolar disorder](https://cedclinic.com/cannabis-induced-appetite-satiety-bypass-thc-brain/) risk by age 26. The study represents one of the largest longitudinal investigations of this association, drawing on clinical health records rather than self-reported data. Researchers note that the findings reinforce the need for youth-focused prevention strategies regardless of the broader legalization debate. Dr. Caplan’s Take“This study doesn’t argue against legalization, it argues for honest, evidence-based youth prevention as a non-negotiable component of any responsible cannabis policy.” Clinical Perspective A landmark JAMA Health Forum study tracking nearly half a million adolescents reveals a twofold increased risk of psychotic and bipolar disorders among cannabis users by age 26. Drawing on actual clinical records rather than self-reported data, this longitudinal research offers compelling evidence for conversations about adolescent neurodevelopment and substance use. Have thoughts on this? 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Related Articles - [Kaiser Study Finds Higher Risk of Psychiatric Disorders in Teens Who Use Cannabis](https://cedclinic.com/adolescent-cannabis-psychiatric-outcomes-2026-digest/) - [Teenage Cannabis Users Twice as Likely as Non-Users to Develop Psychosis](https://cedclinic.com/adolescent-cannabis-psychiatric-outcomes-2026-digest/) 💬 Join the Conversation Have a question about how this applies to your situation? [Ask Dr. Caplan →](https://benjamincaplan.com/ask-dr-caplan) Want to discuss this topic with other patients and caregivers? [Join the forum discussion →](https://cedclinic.com/interact/discussion-forums/) 📰 Source: [https://ground.news/daily-briefing/study-teen-cannabis-use-linked-to-d](https://ground.news/daily-briefing/study-teen-cannabis-use-linked-to-d) Further Reading Evidence Watch[Endocannabinoid System Research: Cannabinoids in Pediatric Care](https://cedclinic.com/cannabinoid-clinical-trials-pediatric-care-research/)CED Clinic Blog[Adolescent Cannabis Use and Psychosis Risk: What This Cohort Study Shows and What It Does Not](https://cedclinic.com/adolescent-cannabis-psychiatric-outcomes-2026-digest/)Cannabis Memes[College is hard lmao](https://cedclinic.com/college-is-hard-lmao/) [https://cedclinic.com/contact/](https://cedclinic.com/contact/) Physician-Led, Whole-Person Care A doctor who takes the time to truly understand you. Personal care that starts with listening and is guided by experience and ingenuity. Health, Longevity, Wellness One-on-One Cannabis Guidance Metabolic Balance [Leave a Message](https://cedclinic.com/contact/) [Metabolic Care](https://cedclinic.com/metabolic/metabolic-how-it-works/) [Medical Consulting](https://cedclinic.com/book/) [Cannabis Care](https://cedclinic.com/book/) [https://cedclinic.com/contact/](https://cedclinic.com/contact/) RELATED READING AT CED CLINIC Continue exploring the evidence [Endocannabinoid System Research: Teen Cannabis and Mental Health](https://cedclinic.com/adolescent-cannabis-psychiatric-outcomes-2026-digest/) Explore research on how the [endocannabinoid system](https://cedclinic.com/endocannabinoid-system-fear-extinction/) relates to teen cannabis use and its impact on mental health. [Read More](https://cedclinic.com/adolescent-cannabis-psychiatric-outcomes-2026-digest/) [Adolescent Cannabis Use Linked to Doubling Risk of Psychotic and Bipolar Disorders](https://cedclinic.com/adolescent-cannabis-psychiatric-outcomes-2026-digest/) A detailed look at the increased risk of psychotic and bipolar disorders linked to adolescent cannabis use. [Learn More](https://cedclinic.com/adolescent-cannabis-psychiatric-outcomes-2026-digest/) [Teenage Cannabis Users Twice as Likely as Non-Users to Develop Psychosis](https://cedclinic.com/adolescent-cannabis-psychiatric-outcomes-2026-digest/) Study findings show teenage cannabis users have twice the risk of developing psychosis compared to non-users. [Discover Insights](https://cedclinic.com/adolescent-cannabis-psychiatric-outcomes-2026-digest/) ### Related --- ### Verification & Medical Governance - **Lead Clinical Author:** Benjamin Caplan, MD - **Credentials:** Board Certified in Family Medicine (ABFM), Founder & CMO CED Clinic & CED Foundation, Author of *The Doctor-Approved Cannabis Handbook* (Penguin Random House). - **Clinical Scale:** 350,000+ lifetime evaluations overseen; 81,008-patient Real-World Evidence Registry (`~/.ced_rwe_vault.db`); 125,000+ peer-reviewed study literature observatory (`http://localhost:8768/api/explorer/terminal`). - **License Verification:** Commonwealth of Massachusetts License #240562 (https://checkahealthlicense.mass.gov/). - **NPI Registry:** 1962722637 (https://npiregistry.cms.hhs.gov/provider-view/1962722637). - **Ethics & Data Privacy:** Clinical registry observations adhere strictly to HIPAA Safe Harbor de-identification (45 CFR § 164.514(b)) and criteria for secondary research exemption under 45 CFR § 46.104(d)(4).