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1 published articleBuilding this topic
Consumer HealthObservationalCannabis

Does Cannabis Shrink Your Brain?

A viral claim turns cannabis brain research into a one-line shrinkage scare. The evidence is messier: blood flow, activation, volume, cognition, age, dose, and heavy-use patterns are not interchangeable.

VV Signal Score

58

Early or context-dependent

Sources
10
Studies
7
Claims
7
AHA marijuana brain healthAmen marijuana SPECT perfusionDunedin long-term cannabis
16 min readRead->

Research map

View related studies

Research records connected to this topic through topic tags, source records, and timeline events.

Tier 3Observational study

Gowin cannabis fMRI

Brain Function Outcomes of Recent and Lifetime Cannabis Use

Observational study from 2025 in JAMA Network Open, translated into key findings, limitations, and consumer relevance.

JAMA Network Open / 2025->

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Brain Function Outcomes of Recent and Lifetime Cannabis Use

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