What Your Dentist Hasn't Told You About Alzheimer's

What Your Dentist Hasn't Told You About Alzheimer's

NOvaFor most of us, brushing is about fresh breath and avoiding cavities. But a growing body of research suggests your mouth may matter for something much bigger: your brain.


The Oral-Brain Connection

Your mouth hosts roughly 700 species of bacteria in a delicate balance. When that balance tips, a state called dysbiosis, harmful species take over and drive gum disease.¹ And inflamed, bleeding gums let oral bacteria slip into the bloodstream.


One bacterium in particular has caught researchers' attention: Porphyromonas gingivalis, the main driver of chronic gum disease. In a landmark 2019 study published in Science Advances, scientists detected its toxins (called gingipains) in over 90% of Alzheimer's brains examined, and the toxin levels tracked with the severity of brain damage.²

Lab and animal studies show P. gingivalis can trigger the same changes seen in Alzheimer's: amyloid plaque buildup, neuroinflammation, and blood-brain barrier disruption.³

How Sure Are We?

Not entirely. The strongest direct test, a 2021 trial of a drug designed to block gingipains, missed its main goals overall, though it helped a subgroup with severe gum infection.⁴ Recent reviews call P. gingivalis a likely contributor to Alzheimer's in susceptible people, not a proven cause.⁵


But the broader message is solid: chronic oral inflammation is bad news for the rest of your body, and gentler oral care is probably wise.


Where Tablets Come In

Toothpaste tablets are anhydrous, so they don't need synthetic preservatives. That also means formulators can skip ingredients like SLS, a harsh foaming agent linked to mouth ulcers in susceptible people.


Our tablets are built around xylitol (which selectively reduces cavity-causing bacteria),⁶ nano-hydroxyapatite (a remineralizer used in Japan since the 1980s), and zinc citrate for breath and gum health. No SLS, no parabens, no synthetic preservatives.


We can't promise any toothpaste protects your brain. Nobody can honestly make that claim yet. But given where the science is heading, formulating with what your mouth doesn't need feels like the right direction.



References

  1. Borsa, L., Dubois, M., Sacco, G., & Lupi, L. (2021). Periodontal microorganisms and Alzheimer disease: A causative relationship? Periodontology 2000. https://pubmed.ncbi.nlm.nih.gov/35244967/

  2. Dominy, S. S., et al. (2019). Porphyromonas gingivalis in Alzheimer's disease brains: Evidence for disease causation and treatment with small-molecule inhibitors. Science Advances, 5(1). https://doi.org/10.1126/sciadv.aau3333

  3. Liu, S., Butler, C. A., Ayton, S., Reynolds, E. C., & Dashper, S. G. (2024). Porphyromonas gingivalis and the pathogenesis of Alzheimer's disease. Critical Reviews in Microbiology, 50(2), 127 to 137. https://doi.org/10.1080/1040841X.2022.2163613

  4. Detke, M., et al. (2021). GAIN trial of atuzaginstat (COR388), Phase 2/3 results. https://alzheimersnewstoday.com/news/cortexyme-gain-trial-atuzaginstat-potential-benefit-alzheimers-patients-severe-gum-disease/

  5. Shawkatova, I., Durmanova, V., & Javor, J. (2025). Alzheimer's disease and Porphyromonas gingivalis: Exploring the links. Life, 15(1), 96. https://doi.org/10.3390/life15010096

  6. Newton, J. T., et al. (2020). A systematic review and meta-analysis of the role of sugar-free chewing gum on Streptococcus mutans. BMC Oral Health. https://pmc.ncbi.nlm.nih.gov/articles/PMC8082871/

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