Dr. Katie To joined Sean Kelly on the Digital Social Hour to make the case that teeth are not inert bone but living organs wired into the brain, gut, hormones, and immune system. A biological wellness dentist, she has spent her career pushing back against the idea that oral health stops at brushing and flossing.
The conversation moves from her own experience with chronic mercury exposure in dentistry to the everyday habits — mouth breathing, tap water, the wrong floss routine — that quietly shape whole-body health. It's a wide-ranging, practical look at prevention over patchwork.
About Dr. Katie To
Dr. Katie To practices biological dentistry, an approach that treats the mouth as an entry point to systemic health rather than an isolated set of problems to patch. Her work centers on identifying hidden sources of inflammation and toxicity — from amalgam fillings to jaw infections — before they show up as symptoms elsewhere in the body.
She has spoken openly about her own health scare tied to mercury exposure in dental practice, an experience that shaped her focus on safer materials and root-cause prevention. Dr. Katie To's perspective draws on the mounting research linking oral bacteria and inflammation to conditions far outside the mouth, including heart health, fertility, and cognitive decline.
What Dr. Katie To and Sean Kelly Talked About
- Why every tooth functions as a living organ tied to the rest of the body
- The case against mercury (amalgam) fillings and why many countries have banned them
- How hidden jaw infections and oral bacteria can quietly drive inflammation and fatigue
- Why mouth breathing raises cavity risk even with a healthy diet
- The overlooked link between tongue ties, posture, and chronic pain
- What water pick versus floss actually does for the oral microbiome
- A simple, natural approach to toothpaste and daily oral care
- Why biohacking can't fix a mouth that's fundamentally out of balance
Why This Conversation Matters
For anyone who has treated dental visits as routine maintenance, this conversation reframes the mouth as one of the most important systems in the body. Dr. Katie To's blend of personal experience and clinical insight makes a compelling case for paying closer attention to a part of health most people overlook entirely.
▶ Watch the full episode on YouTube
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About Sean Kelly & the Digital Social Hour
Sean Kelly is an entrepreneur and the host of the Digital Social Hour, one of the fastest-growing interview podcasts in the world, where he sits down with entrepreneurs, athletes, creators, and cultural voices for candid, long-form conversations. The show draws over 100 million views a month across platforms. Explore more guest features on SeanKelly.io.
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