29: Gut Health Starts in the Mouth: Exploring the Gut-Brain Axis and Functional Solutions

28 Apr 2025 · 57 min
Episode

28 Apr 2025 · 57 min

0:00

Podcast (recorded April 28, 2025) hosted by Aaron Hartman, MD with Becky Hartman. This Q&A episode links oral health to gut and systemic health (oral bacteria can 'seed' the GI tract), defines SIBO (small intestinal bacterial overgrowth) and describes how breath and oral signs can indicate upper-GI or systemic issues. Aaron emphasizes gut production of key neurotransmitters (claims: ~90% serotonin, ~50% dopamine produced in gut) and the importance of diet as the primary driver of gut–brain health. Practical clinical guidance includes: recognize histamine/mast cell reactions from fermented foods (hives, flushing, tachycardia, anxiety, GI upset), use home stomach-acid tests (betaine HCl challenge, sodium-bicarbonate burp timing) before assuming high acid, tapering off PPIs slowly and supporting gut lining (glutamine, zinc carnosine, demulcents), and common pitfalls when doing the 5R gut-repair approach (not starting with real food, reintroducing foods too quickly). Testing recommendations cited: comprehensive stool panels (Doctor's Data, Genova GI Effects, GI360), blood titers for viral reactivation, and targeted metabolic labs (e.g., TMAO referenced). The episode also discusses probiotic supplement quality issues, distinguishing fermented vs pickled foods, diet paradigms (carnivore as an elimination approach; concerns about long-term data), and links between gut health and female reproductive conditions (PCOS/endometriosis) including environmental endocrine disruptors. Barriers to wider adoption of functional medicine (training, reimbursement) are noted.

Questions this episode answers

Small Intestinal Bacterial Overgrowth (SIBO).

Betaine hydrochloride challenge test and the sodium-bicarbonate (baking soda) burp-timing test.

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