this post was submitted on 17 Aug 2026
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Mental Health

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Heavy cannabis users have been found to have nearly four times the odds of developing schizophrenia or psychosis compared to non-users, according to a Kings College Meta-Analysis (pmc.ncbi.nlm.nih.gov)
submitted 2 days ago by floofloof@lemmy.ca to c/mentalhealth@lemmy.world
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[โ€“] kikutwo@lemmy.world 22 points 2 days ago (1 children)

Although this meta-analysis shows a strong and consistent association between cannabis use and psychosis, a causal link cannot be unequivocally established.

[โ€“] givesomefucks@lemmy.world 15 points 2 days ago

a causal link cannot be unequivocally established

To clarify, we can't even attempt to prove causation due to users self selecting to use cannabis, especially at high dosages at young ages.

So it's not like people try to find causation and failed, we ethically can't even do the experiments required to see if there's causation. Because to do that modern scientists would have to pull the same experiments the CIA did with LSD in the 60s.

We'd have to dose people (kids really) who don't want dosed or even really know it's happening.

So we can't say the absence of proven causation means anything.