What if supporting a healthier brain starts with paying attention to your gut and "Why Probiotics Alone Won't Fix Your Digestive Problems."

Your digestive tract has its own nerve network, your “second brain”, and it’s constantly communicating with the brain in your head. That conversation connects digestion, stress, immune activity, and the environment supporting your nervous system.

In this episode of From the Source with Dr. Gary, we build on our discussion of neuroplasticity to explore the gut–brain connection and why it matters for healthy aging.

Discover:
• How the enteric nervous system works with “fight or flight” and “rest and digest.”
• Why your gut microbiome is a living garden that needs consistent nourishment.
• How fiber, protein, essential fats, and key nutrients support gut and nervous system function.
• How ultra-processed foods may reinforce cravings—and how healthier patterns can be practiced.
• Why stress and digestive discomfort can become a repeating loop.
• When recurring gas, bloating, or indigestion deserves a closer look through individualized assessment and testing.

From childhood development to memory, mood, focus, and healthy aging, we explore practical ways to support the body that supports your brain.

Find the source. Simplify the solution. Restore your health.

TESTING & PERSONALIZED SUPPORT

Free Strategy Call with Dr. Gary
Discuss your symptoms, goals, and which testing options may fit your needs:
https://calendar.app.google/NNmcFNUu2A1Mtuow5

Food Sensitivity Testing
Results are reviewed alongside your symptoms and health history:
https://us.fullscript.com/j/dbrodeur/TGFiczo6U3RvcmVmcm9udDo6SXRlbS0zMzQ4Mw==

Hair Tissue Mineral Analysis (HTMA)
Measures minerals and certain potentially toxic elements in hair as part of an individualized assessment:
https://us.fullscript.com/j/dbrodeur/TGFiczo6U3RvcmVmcm9udDo6SXRlbS0zMzQ4NA==

GI-MAP Stool Testing
Measures selected microorganisms and markers related to digestion and intestinal health:
https://us.fullscript.com/j/dbrodeur/TGFiczo6U3RvcmVmcm9udDo6SXRlbS0zMzQ3OQ==

GI-MAP Plus Zonulin
Adds a marker sometimes used when investigating intestinal permeability; results alone do not diagnose “leaky gut”:
https://us.fullscript.com/j/dbrodeur/TGFiczo6U3RvcmVmcm9udDo6SXRlbS0zMzQ5MA==

RESEARCH & FURTHER READING

Hough and colleagues. The Addicted Brain: How Processed Foods Hijack Reward Pathways. Pharmacological Research, 2026.
https://pubmed.ncbi.nlm.nih.gov/41525853/

N-3 (Omega-3) Fatty Acids: Effects on Brain Dopamine Systems and Potential Role in the Etiology and Treatment of Neuropsychiatric Disorders.
https://pmc.ncbi.nlm.nih.gov/articles/PMC6563911/

Wenzel and colleagues. Short-Chain Fatty Acids Alone or in Combination Regulate Select Immune Functions of Microglia-Like Cells. Laboratory research exploring possible mechanisms.
https://doi.org/10.1016/j.mcn.2020.103493

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https://www.fromthesourcewithdrgary.com/