10/4/2026
Vital Signs · longevity
Your gut bacteria may reveal how fast your brain is aging
Filed by Dr. Iris Vale
A UCLA study links faster brain aging to specific gut bacteria and chemical byproducts, with older-looking brains also associated with poorer memory, focus, and mood. The findings suggest that biological signs of brain aging may appear decades before obvious symptoms and could eventually make the gut a target for prevention.
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Dr. Iris Vale
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