Episode 121: Insulin Resistance. Why Your Autoimmune & Thyroid Symptoms Aren’t Improving
If you’ve been diagnosed with Hashimoto’s thyroiditis or another autoimmune condition, and your symptoms aren’t improving, this episode will help you understand why. In this episode of the Metabolic Health Series, we uncover how insulin resistance may be the missing piece behind persistent fatigue, brain fog, weight gain, and ongoing thyroid symptoms.
You’ll learn how insulin resistance disrupts the immune system and drives chronic inflammation, creating the perfect environment for autoimmune disease progression. We break down the science behind impaired T4 to T3 conversion, elevated reverse T3, and why thyroid antibodies (like TPO antibodies) continue to rise, even when your TSH is within range. This explains why so many people with thyroid conditions still feel unwell despite being told everything looks “fine.”
This episode answers questions like:
“Why do I still feel tired with Hashimoto’s?”
“Can insulin resistance cause autoimmune disease?”
“What causes high thyroid antibodies?”
“Why is my TSH normal but I feel hypothyroid?”
“How does inflammation affect thyroid function?”
“Can metabolic syndrome cause autoimmune disease?”
This episode will give you the clarity you need to connect your symptoms and advocate for deeper testing. If you’re struggling with unresolved thyroid or autoimmune symptoms, you’ll walk away understanding what’s been overlooked, and how addressing insulin resistance can help restore energy, improve metabolic health, and support long-term healing.
DISCLAIMER: The content in this podcast and related website is not intended to be a substitute for medical advice. It is not intended to be used to diagnose or treat, instead it is designed to help educate and inspire. Always seek the advice of a professional medical practitioner or qualified health practitioner. Never ignore or disregard advice given to you based on information in this podcast or related website and do not delay in seeking medical advice.
Timestamps:
[02:47] - How Insulin Resistance Drives Autoimmune Disease (Biological Mechanisms)
Understand how insulin resistance triggers immune dysfunction through chronic inflammation, cytokines (TNF-alpha, IL-6), and TH17/Treg imbalance, key drivers of autoimmune conditions.
[06:30] - Insulin Resistance and Thyroid Function Explained
Learn how metabolic dysfunction impacts thyroid health, including impaired T4 to T3 conversion, increased reverse T3, and why symptoms persist despite “normal” thyroid labs.
[10:45]- Hashimoto’s & Why Metabolic Testing Is Essential
Why Hashimoto’s thyroiditis cannot be fully managed without assessing insulin resistance, thyroid antibodies, and the metabolic drivers behind ongoing symptoms.
[14:10] - The Autoimmune–Metabolic Connection (RA, Lupus, Psoriasis)
Explore how insulin resistance contributes to autoimmune diseases like rheumatoid arthritis, lupus, and psoriasis through shared inflammatory pathways.
[18:20]- Functional Medicine Approach to Autoimmune & Thyroid Health
What a comprehensive metabolic assessment looks like, including fasting insulin, HOMA-IR, thyroid markers, inflammation, gut health, and nutrient deficiencies.
“Managing the autoimmune condition without addressing the metabolic environment is treating the fire without addressing the accelerant. The metabolic immune axis is so consistently present in the patients I work with and so consistently under-addressed in their care that I consider it one of the most significant gaps in contemporary autoimmune and thyroid medicine.”
Essential learnings from this episode…
Insulin resistance is a major driver of autoimmune disease. It creates a chronic inflammatory environment that disrupts immune regulation, shifting the body toward autoimmune activation rather than immune balance.
Thyroid symptoms can persist even with “normal” lab results. Standard tests often miss key issues like poor T4 to T3 conversion and elevated reverse T3, leaving many patients symptomatic without clear answers.
Hashimoto’s is not just a thyroid condition, it’s metabolic and immune-driven. Without addressing insulin resistance and inflammation, thyroid antibodies can continue to rise, and symptoms may not improve long-term.
Chronic inflammation links metabolic dysfunction and autoimmunity. Cytokines like TNF-alpha and IL-6, elevated in insulin resistance, play a direct role in worsening autoimmune disease activity.
Conditions like rheumatoid arthritis, lupus, and psoriasis are strongly connected to insulin resistance and metabolic syndrome, not just isolated immune dysfunction.
A full metabolic assessment is essential for real progress. Testing fasting insulin, HOMA-IR, thyroid markers, inflammation, gut health, and nutrients provides a complete picture, and a more effective path to healing.
EPISODE 121
Important links & mentions from this episode
The Optimal You 7 Day Reset (£7.99)
Episode 120: Insulin Resistance: The Hidden Cause of Fatigue, Brain Fog & Weight Gain
Goode Health Clinic Functional Medicine Packages
Take the FREE MitoImmune Health Assessment
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