Dr. Katie ToThe Wellness Dentist, CEO and Founder of Center for Wellness Dentistry and Wellness Dentist Institute.

Your Mouth Is Not an Island: The Mouth-Body Connection

21 Jul 2026 · 1 min

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1:10

In this educational video, Dr. Katie To explains how oral health directly influences overall health through five key mechanisms. She describes how periodontal bacteria can enter the bloodstream, travel to distant sites including the brain, and have been identified in Alzheimer's plaques. She highlights the bidirectional relationship between gum disease and diabetes, noting that gum inflammation worsens insulin sensitivity and high blood sugar impairs gum healing. Dr. To emphasizes that chronic gum inflammation contributes to systemic inflammatory load, which underlies many diseases. She advocates for "wellness dentistry"—preventive and therapeutic dental care aimed at reducing oral bacterial burden and inflammation—to help the body protect itself, reinforcing the central message that the mouth is not an isolated organ.

Chapters

Your mouth is not an island. Let's talk about the mouth-body connection. This is the science that changes how you think about your health. There are 5 ways that your oral health is actually forming who you are. Periodontal bacteria, it goes in the bloodstream, and you can't keep your bacteria in your mouth only. It's going to go through the bloodstream, go to your big toe, go across the— some of them, some of the bacteria go across the blood-brain barrier with the blood. Gingivalis is one of the most common gum pathogens, and it has been found in the Alzheimer's plaque. I always said plaque is plaque, the plaque in the arteries, the plaques in the brain, they are finding these bacteria are a significant factor causing. If you have really elevated blood sugar, uh, fasting insulin levels are high, uh, gum disease and diabetics, uh, those are definitely bidirectional. The bacteria get in there, they decrease the healing, and they increase your insulin sensitivity. You end up having some issues with not being able to clear sugar in the blood. If you have gum disease, you, uh, or chronic gum inflammation, you are basically elevating your inflammatory load. Everything is— all disease processes are basically start with inflammation. If we can eliminate that with wellness dentistry, you can actually help the body protect itself. Your mouth is not an island.