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Judging by studies on long term use of other mind-altering drugs, I would expect psilocybin to similarly cause decline in cognitive abilities after prolonged use.

Unfortunately (or maybe fortunately), I could not find studies on effect of specifically psilocybin on cognitive abilities.

And please, don't bring up EmoIQ and other non-reasoning related stuff. This is not what the concern is about.



If anything shrooms would be contributing to neurogenesis[0] not destroying brain cells. Opposite to alcohol which is well known to destroy brain cells.

[0] https://en.wikipedia.org/wiki/Neurogenesis


I see you share the sentiment. Well,

> Injection of PSOP, 25I-NBMeO or ketanserin resulted in significant dose-dependent decreases in number of newborn neurons in hippocampus

> At the low doses of PSOP that enhanced extinction, neurogenesis was not decreased, but rather tended toward an increase

(in mice) https://pubmed.ncbi.nlm.nih.gov/23727882/

The way I read it large doses definitely decrease neurogenesis and low doses look like they slightly increase, but the authors are uncertain.

That putting aside that neurogenesis changes caused by the substance might be affecting the actual intelligence either way.




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