Teen Marijuana Use Linked to Mental Health Risks

Science News Today | 2 Min News | The Daily News Now! · Jun 28, 2026 · 1m

New research tracking over 463,000 teens from adolescence to age 26 reveals a chilling link: marijuana use during those formative years doubles the risk of developing serious mental health disorders like psychosis and bipolar disorder by young adulthood. Using real-world health records, scientists found cannabis use often preceded diagnoses by years, suggesting causation—not just correlation. Even occasional use mattered, and with increasingly potent products flooding the market, the public health implications are urgent. The study also highlights a troubling disparity—teens on Medicaid and…