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Stronger Weed, Higher Risk? Potent THC Linked to Psychosis and Addiction

State legislatures are debating potency caps for legal cannabis products, balancing public health concerns against industry opposition as research links high-potency THC to psychosis.
A systematic review of 99 studies published in the Annals of Internal Medicine in 2025 found strong associations between high-concentration THC products and increased risks for psychosis, schizophrenia, and cannabis use disorder.
Connecticut lawmakers recently reinstated a THC cap on flower, while Washington state Democratic Rep. Lauren Davis has repeatedly proposed safeguards to limit high-potency concentrates, citing safety risks.
The National Cannabis Industry Association argues that blanket caps could push users toward illicit markets, favoring accurate labeling and public education campaigns instead.
Public safety concerns stem from incidents like an Oklahoma case where a young child ingested a 1,000 mg edible, fueling debate over balancing market access with consumer protection.

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Stronger weed, higher risk? Potent THC linked to psychosis and addiction

A sweeping review of nearly 100 studies has raised concerns about the mental health impacts of high-potency cannabis products. Researchers found strong links to psychosis, schizophrenia, and cannabis use disorder, while results for anxiety and depression were mixed and sometimes contradictory. Although the findings confirm that higher THC concentrations pose risks, the evidence still isn’t clear enough to offer firm clinical guidance, leaving sc…

7 days ago·United States

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