# A Huge Study Finds a Link Between Cannabis Use in Teens and Psychosis Later – NPR > **Author:** Benjamin Caplan, MD (ABFM Board Certified, MA Lic. #240562, NPI: 1962722637) > **Publisher:** CED Clinic (https://cedclinic.com) > **Canonical URL:** https://cedclinic.com/large-scale-adolescent-cannabis-study-psychosis-link/ > **Published:** 2026-02-23T17:34:10-04:00 | **Last Modified / Clinically Audited:** 2026-09-28T11:14:31-04:00 > **Clinical Summary:** This large-scale adolescent cannabis study highlights the link between teen cannabis use and increased psychosis risk, emphasizing brain development concerns. --- CED Clinical Relevance #78 Strong Clinical Relevance High-quality evidence with meaningful patient or clinical significance. Mental HealthSafetyResearchPediatricsTHC Why This Matters If you are a parent, caregiver, or young adult considering cannabis, this research underscores why medical guidance, age-appropriate restrictions, and honest conversations about brain development should be part of any decision about use. Clinical Summary Large-scale longitudinal research continues to reinforce what clinicians in [cannabis medicine](https://cedclinic.com/essential-oils-industrial-hemp-antimicrobial-benefits/) have long recognized: the adolescent brain is uniquely vulnerable to cannabinoid exposure, and early use is associated with elevated risk of psychotic disorders in adulthood. This does not mean cannabis inevitably causes psychosis, but it does mean that age of onset, frequency of use, and genetic predisposition are critical variables that deserve serious clinical attention. Responsible cannabis medicine has always drawn a bright line around adolescent use, and studies like this strengthen the evidence base for that position. Dr. Caplan’s Take “This is not anti-cannabis news, this is pro-brain-development news, and any physician worth their license should be able to hold both truths at once.” Clinical Perspective A new large-scale longitudinal study adds significant weight to what cannabis clinicians already factor into every adolescent-adjacent conversation: the developing brain and THC do not mix well. Following over 400,000 teens into adulthood, the research found elevated psychosis risk among those who used cannabis during adolescence, reinforcing the importance of age as a core variable in risk assessment. ️ This is not a prohibition argument — it is a precision medicine argument, and it demands that we get serious about screening, dosing guardrails, and honest education for young people. In my clinic, we have always treated [adolescent cannabis exposure](https://cedclinic.com/cannabis-impairment-testing-arizona-marijuana-dui-laws/) as a red-flag topic, and data like this validates that clinical instinct. The real takeaway for patients and families is simple: cannabis can be medicine for the right person at the right time, and adolescence is rarely that time. Have thoughts on this? 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[Join the forum discussion →](https://cedclinic.com/interact/discussion-forums/) 📰 Source: [https://www.npr.org/2026/02/23/nx-s1-5719338-e1/a-huge-study-finds-a-link-between-cannabis-use-in-teens-and-psychosis-later](https://www.npr.org/2026/02/23/nx-s1-5719338-e1/a-huge-study-finds-a-link-between-cannabis-use-in-teens-and-psychosis-later) 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 [A huge study finds a link between cannabis use in teens and psychosis later – WBAA](https://cedclinic.com/cannabis-youth-psychosis-risk-study-insights/) Explore another comprehensive study reinforcing the connection between [adolescent cannabis use](https://cedclinic.com/adolescent-cannabis-use-and-anxiety-research/) and later psychosis risk. [Read More](https://cedclinic.com/cannabis-youth-psychosis-risk-study-insights/) [Teens Who Use Cannabis Face Higher Risk Of Mental Disorders, Study Finds – Forbes](https://cedclinic.com/teen-cannabis-use-mental-health-risks-study/) This article discusses the broader mental health risks associated with teen [cannabis use](https://cedclinic.com/cannabis-cardiovascular-health-insights-2024/), including psychosis and other disorders. [Learn More](https://cedclinic.com/teen-cannabis-use-mental-health-risks-study/) [Teen Marijuana Use Doubles Chances of Future Psychotic Disorders, Study Finds](https://cedclinic.com/adolescent-cannabis-use-psychotic-risk-study/) A focused study highlighting how teen marijuana use significantly increases the likelihood of developing psychotic disorders later. [Discover Insights](https://cedclinic.com/adolescent-cannabis-use-psychotic-risk-study/) ### Related --- ### Verification & Medical Governance - **Lead Clinical Author:** Benjamin Caplan, MD - **Credentials:** Board Certified in Family Medicine (ABFM), Former CMO Canna Care Docs (250,000+ patients supervised), 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).