UCLA Links Gut Bacteria to Brain Aging in Healthy Adults — SkimNews
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- UCLA Health researchers analyzed brain scans from nearly 1,500 adults to calculate a Brain Aging Index, revealing that higher brain age correlates with worse working memory and executive function
- Brain Aging Index scores were consistently linked to self-reported depression symptoms and altered activity in memory- and self-referential thought-related brain regions across all three study groups
- Gut microbiome analysis in one cohort tied a higher Brain Aging Index to specific bacteria and metabolic byproducts, including certain fat molecules, a cholesterol-related compound, and lower estetrol levels
- Dr. Arpana Church stated that biological signs of brain aging may be detectable decades before cognitive symptoms appear, opening potential for early intervention via gut health
Why it matters: The findings shift the timeline for detecting brain aging forward by decades, identifying measurable gut-brain connections in otherwise healthy adults. This could redirect prevention strategies toward microbiome health long before cognitive decline becomes apparent, affecting how at-risk individuals are identified and monitored.
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