83. Is Your Child’s Gut Wrecking Their Teeth, Immunity, and Brain, with Dr. Elisa Song
The only pediatric doctor formulated probiotic and supplement for kids:
The test for your child's microbiome:
If you've ever done everything "right" for your kids, clean eating, good hygiene, regular checkups, and still watched them struggle with cavities, ear infections, big tonsils, or just getting sick over and over again, this conversation is going to stop you in your tracks. Because the answer isn't in the toothbrush. It isn't in the antibiotic. It starts in the gut, and it shows up everywhere.
What You'll Learn in This Episode:
- Why tooth decay in children is not a hygiene problem but a sign that the immune system and microbiome are out of balance, and what to do about it.
- How the oral microbiome and gut microbiome are in constant conversation, and why disrupting one affects the other, and ultimately the whole child.
- What early warning signs like mouth breathing, enlarged tonsils, frequent ear infections, and bad breath are actually telling you about your child's gut health.
- Which foundational lab tests Dr. Song recommends for children and teenagers, including why fasting insulin and cholesterol are two markers most pediatricians aren't checking but probably should be.
- The three microbiome champion food categories most kids are missing, and the key nutrients almost every child needs more of, even the healthy eaters.
About Dr. Elisa Song: Dr. Elisa Song is a Stanford, NYU, and UCSF-trained integrative pediatrician, pediatric functional medicine expert, and the founder of Healthy Kids Happy Kids. She is the author of the Healthy Kids Happy Kids book and the creator of a clinically backed pediatric supplement line designed to fill both the nutritional and microbiome gaps in children's diets. She is also the Chief Medical Officer for Tiny Health, a microbiome testing company with age-appropriate reference ranges for babies and children. Dr. Song has spent over two decades helping families prevent and reverse chronic childhood illness by getting to the root.
Key Insights:
One of the most important reframes in this conversation is that cavities are not a brushing problem. They are a terrain problem. When the oral microbiome is off, when pathogenic bacteria are overpowering the beneficial ones, decay follows. And the oral microbiome doesn't exist in isolation. It's in constant crosstalk with the gut, the immune system, the sinuses, and even the developing brain. So when a child has a mouthful of cavities despite a health-conscious home, the question to ask isn't what are they eating. It's what is their body doing with it.
Dr. Song and Dr. Carver also dig into something that doesn't get nearly enough airtime in conventional pediatrics, which is that chronic childhood symptoms like enlarged tonsils, mouth breathing, frequent ear infections, and recurring congestion are immune signals, not just developmental quirks. They are the body asking for help. And in many cases, the gut microbiome is the place to start looking for answers.
Perhaps the most powerful moment in this episode is the conversation around autoimmunity starting decades before a diagnosis. Research shows that autoimmune antibody rates in teenagers have been rising steadily since the 1980s. These kids don't have a disease yet, but their immune system is already raising its hand. The encouraging news, and both Dr. Song and Dr. Carver are clear about this, is that we can course correct. Supporting the gut microbiome, optimizing nutrition, and calming the nervous system are not just wellness trends. They are genuinely preventive medicine.
Resources Mentioned: [Placeholder: Add any books, tools, or links mentioned in this episode, including Dr. Song's book Healthy Kids Happy Kids and the Tiny Health microbiome test.]
Connect With Dr. Elisa Song:
Website: healthyhappykids.com
Instagram: @healthykids_happykids
The only pediatric doctor formulated probiotic and supplement for kids:
Test your child's microbiome:
FREE How to Reverse Gum Disease in 6 Weeks:
Connect With Dr. Rachaele Carver:
Join the 6-Week Gum Disease Course
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Disclaimer: This podcast is for educational purposes only. Information discussed is not intended for diagnosis, curing, or prevention of any disease and is not intended to replace advice given by a licensed healthcare practitioner. Opinions from guests are their own, and this podcast does not condone or endorse opinions made by guests. This podcast and its guests may have direct or indirect financial interests associated with products mentioned.
