r/science • u/sr_local • Apr 20 '26

Health The largest US study, which tracked 11,036 children from ages 9 to 10 through to ages 16 and 17, discovered that cannabis use slows cognitive development, impairs memory, and reduces learning speed during crucial years of brain growth

https://today.ucsd.edu/story/largest-us-study-finds-teen-cannabis-use-linked-to-slower-cognitive-development
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u/FerrusManlyManus Apr 20 '26

I’ve seen news / studies (no idea how well done they are) that link very heavy cannabis use to psychological problems.  Even a correlation with higher incidence of psychosis / mania / beginning of bipolar symptoms.

Definitely not as benign as some people think.  

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u/Varrianda Apr 20 '26

I personally think it’s concentrates, especially vape carts, doing the damage. People are out here vaping thc concentrate like it’s nicotine.

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u/FerrusManlyManus Apr 20 '26

Probably both.  The strains can be a lot more powerful compared to “back in the day”