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Commercialising Cannabis Drives Up Use and Mental Health Problems โ€” Decriminalisation Doesn't

The GuardianยทThursday, 18 June 2026

A new international study reviewed cannabis policy changes between 2000 and 2025 and found that commercial sale of cannabis increased both the number of users and rates of psychosis. Decriminalising possession or strictly regulating access did not appear to push usage higher. The findings draw a sharp distinction between different types of cannabis policy reform.

Why It Matters

As drug policy debates evolve globally, this research gives policymakers and the public clearer data on what type of reform actually changes behaviour โ€” relevant as India continues to debate its own approach to cannabis.

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