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

How Saliva Testing Reveals What Blood Work Misses

25 Jun 2026 · 1 min

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In this brief presentation Dr. Katie To explains how saliva testing provides clinicians with actionable information that standard blood work often misses. The saliva report can reveal a high burden of oral infections, which can explain patient fatigue and why conventional medications may be ineffective if they target the wrong bacteria. Additionally, saliva testing combined with X‑ray imaging can uncover hidden metal dental work that is invisible to the naked eye. Functional and integrative doctors value these insights because they allow them to address upstream sources of illness—such as infections and metal exposure—thereby supporting the body’s downstream healing processes.

Chapters

We give them report on saliva testing. Having that report, the medical doctor can say, wow, I can see that they having a lot of infections going on. No wonder they feel fatigued. No wonder that the medication we put them on not working because it's not the right bacteria. We send them saliva testing where showing if you have a metal filling or any metal, it will show up on the X-ray, which a naked eye could not see just by screening or looking at the mouth. Functional doctors love that because now they actually can address or help patients address the upstream and then therefore support the whole system and address the problem downstream.