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Brain Imaging Study Reveals Cannabis Impact on Working Memory

Heavy cannabis users had 63% lower brain activity in working memory regions, indicating lasting cognitive effects in young adults, researchers found in the largest fMRI study to date.

Summary
Your brain’s "mental workspace" might be taking a hit. The largest cannabis brain-imaging study ever conducted shows a significant decline in working memory for heavy users.

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GreenState broke the news in on Monday, February 16, 2026.
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