# UK researchers find environment shapes how brain ages globally  
**Published:** 2026-04-20T15:12:28.000Z  
**Source:** [Kentucky Health News](https://kyhealthnews.net/2026/04/20/global-study-involving-uk-shows-where-people-live-may-impact-how-the-brain-ages/)  
**AI-generated:** yes (claude-haiku-4-5-20251001)  
**Canonical:** https://feeds.lexingtonky.news/article/uk-researchers-find-environment-shapes-how-brain-ages-globally

LEXINGTON, Ky. — A groundbreaking global study involving researchers at the [University of Kentucky](https://www.uky.edu/) shows that where people live — and the air they breathe, green space they can access, and social conditions they experience — significantly impacts how their brains age biologically.

[The research, published in Nature Medicine](https://kyhealthnews.net/2026/04/20/global-study-involving-uk-shows-where-people-live-may-impact-how-the-brain-ages/), examined data from 18,701 people across 34 countries and found that combined environmental and social factors were more predictive of brain aging than individual clinical diagnoses such as Alzheimer's disease.

The [UK Sanders-Brown Center on Aging](https://medicine.uky.edu/departments/behavioral-science) contributed unique brainwave data spanning more than two decades to the international effort. The study examined what researchers call the "exposome" — the full range of environmental, social and contextual factors people experience throughout their lives, including air pollution, climate patterns, access to green space, water quality, poverty, education, inequality and civic participation.

When modeled together, these 73 environmental and social factors explained up to 15 times more variance in brain aging than any single exposure alone, according to the study. Physical environmental factors such as higher air pollution, extreme temperatures and limited access to green space were most strongly linked to structural changes in the brain, particularly in regions central to memory, emotional regulation and autonomic functions.

"Brain health is shaped not only by biology and individual choices, but also by the broader environments people live in," said Yang Jiang, a professor in the UK Department of Behavioral Science and affiliated faculty member at Sanders-Brown. Jiang's lab was the only group in the United States contributing electroencephalogram data to the brain aging study.

The research suggests that strategies focusing solely on individual lifestyle choices may be insufficient. "Strategies that reduce air pollution, expand green spaces, strengthen education and reduce inequality may also support healthier brain aging," the study authors wrote.

The findings carry important implications for public health policy, suggesting that brain health is a global issue shaped as much by environmental conditions and social equity as by clinical interventions.

## Sources

- [Kentucky Health News](https://kyhealthnews.net/2026/04/20/global-study-involving-uk-shows-where-people-live-may-impact-how-the-brain-ages/)
- [UKNow article: UK contributes to global study showing where people live may impact how the brain ages](https://uknow.uky.edu/research/uk-contributes-global-study-showing-where-people-live-may-impact-how-brain-ages)
- [Nature Medicine journal publication: The exposome of brain aging across 34 countries](https://www.nature.com/articles/s41591-026-04302-z)

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This article was generated by AI (claude-haiku-4-5-20251001) based on source material from Kentucky Health News, enriched with 2 web searches. The original source is available at https://kyhealthnews.net/2026/04/20/global-study-involving-uk-shows-where-people-live-may-impact-how-the-brain-ages/.