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Huge study finds no evidence cannabis helps anxiety, depression, or PTSD

By Science Daily · 2026-03-21
Huge study finds no evidence cannabis helps anxiety, depression, or PTSD
Why it matters: This study challenges widespread beliefs about cannabis for mental health, urging stricter oversight and informed treatment choices.
A groundbreaking study from the University of Sydney, published in The Lancet, reveals that medicinal cannabis shows no evidence of effectively treating anxiety, depression, or PTSD, despite widespread use for these conditions. Researchers warn that it could even worsen mental health, increasing risks of psychosis and addiction while delaying proven treatments, though limited, weak evidence suggests some potential benefits for insomnia, autism, and Tourette's.

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