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flag Aging in mice links gut bacteria changes to memory loss via vagus nerve inflammation, with potential treatments under study.

flag A new study in mice links aging-related cognitive decline to changes in the gut microbiome that disrupt gut-brain communication via the vagus nerve. flag As mice age, certain gut bacteria increase and produce metabolites that trigger inflammation, impairing nerve signaling and reducing memory function. flag Transferring microbiomes from old to young mice caused memory deficits, while removing gut bacteria or stimulating the vagus nerve reversed these effects. flag Findings suggest targeting gut health or nerve activity could help prevent memory loss, though human studies are needed to confirm these results.

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