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Men's Brains Shrink Faster, But Women Face More Alzheimer's

10/15/2025

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Summary

Story summary

An international study published in the Proceedings of the National Academy of Sciences finds that men's brains shrink faster than women's with age.
The researchers analyzed 12,500 MRI scans from nearly 4,700 healthy adults and observed greater volume loss in brain regions including the postcentral cortex.
Despite this, women are diagnosed with Alzheimer's disease nearly twice as often as men, and researchers cite hormonal, genetic, or environmental factors.

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Story summary

An international study published in the Proceedings of the National Academy of Sciences finds that men's brains shrink faster than women's with age.
The researchers analyzed 12,500 MRI scans from nearly 4,700 healthy adults and observed greater volume loss in brain regions including the postcentral cortex.
Despite this, women are diagnosed with Alzheimer's disease nearly twice as often as men, and researchers cite hormonal, genetic, or environmental factors.