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7 unexpected takeaways from the newest research on cannabis and brain effects

Recent studies suggest moderate adult cannabis use may not harm cognition, while heavy or early use is tied to brain changes and higher psychosis risk.

Summary by Ground News
Stephen Lankenau has spent years studying how people use cannabis in everyday life. As director of Drexel University’s Medical Cannabis Research Center, he has watched legalization spread, products grow stronger and daily use become increasingly common.

2 Articles

The Washington PostThe Washington Post
Reposted by
The Seattle TimesThe Seattle Times
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7 unexpected takeaways from the newest research on cannabis and brain effects

Whether it’s used in adolescence, midlife or older age may make a big difference.

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  • 100% of the sources lean Left
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The Washington Post broke the news on Thursday, June 18, 2026.
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