Story perspectives

Study Links Cannabis Use to Bigger Brains, Better Cognition

2/12/2026

Summary

Story summary

A study of 26,362 older adults finds that greater lifetime cannabis use links to larger brain volumes and improved cognition.
The researchers focus on regions with high cannabinoid receptor density, especially the hippocampus.
Moderate use generally aligns with better performance, though some high-use individuals show benefits in specific areas.
Increased cannabis use correlates with lower posterior cingulate volume, prompting questions about implications.

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Story summary

A study of 26,362 older adults finds that greater lifetime cannabis use links to larger brain volumes and improved cognition.
The researchers focus on regions with high cannabinoid receptor density, especially the hippocampus.
Moderate use generally aligns with better performance, though some high-use individuals show benefits in specific areas.
Increased cannabis use correlates with lower posterior cingulate volume, prompting questions about implications.