Does dementia start in the mouth?

Does dementia start in the mouth?

March 2, 2026 · 13 min

About this episode

The episode explores the connection between oral microbes and the onset of dementia.

A number of studies in which the brain tissue of people who have died of dementia have revealed the presence of microbial species such as Porphyromonas gingivalis, Fusobacterium nucleatum, and Tannerella forsythia--all oral microbes. This is an example of translocation, i.e., the migration of microbes from one body site to another. But does this cause or accelerate dementia? This remains an unsettled issue. However, if you have had an oral microbiome test and you have one or more of th...

People in this episode

Host: William Davis

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Mentioned in this episode

Organizations: Porphyromonas gingivalis, Fusobacterium nucleatum, Tannerella forsythia

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