Marijuana linked to mental health risks in young adults, growing evidence shows

New research, involving millions of people worldwide over decades, adds to worries that heavy use of high-potency cannabis could exacerbate the mental health crisis in the U.S.

Over the last decade of diagnosing countless young patients with new psychotic disorders, one striking result has stuck out for New York City psychiatrist Dr. Ryan Sultan.

“Of all the people I’ve diagnosed with a psychotic disorder,” he said, “I can’t think of a single one who wasn’t also positive for cannabis.”

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