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In this episode of Reality Check with Jessica and Jillian, Jessica and Jillian break down how thyroid physiology actually works and why thyroid symptoms are often about far more than one lab marker or one gland. They unpack what your thyroid labs may actually be telling you, why women are so often told their thyroid is “normal” while still dealing with fatigue, brain fog, constipation, weight gain, hair thinning, cold intolerance, poor recovery, and fat loss resistance, and how to think about thyroid function through a broader clinical lens.
This conversation walks through the full thyroid process, including brain signaling, thyroid hormone production, T4 to T3 conversion, hormone transport, cellular availability, and autoimmune activity. It also explains why TSH is only one piece of the picture and why markers like free T4, free T3, reverse T3, TPO antibodies, thyroglobulin antibodies, cholesterol, ferritin, inflammation markers, liver enzymes, and broader metabolic context can all matter when a woman feels hypothyroid but her basic labs are dismissed as fine.
Jessica and Jillian also cover the difference between conventional and functional thyroid interpretation, including how conventional medicine is often screening for overt disease while functional interpretation is looking more closely at whether the body is actually operating well. They explain why thyroid health is deeply connected to liver function, gut health, nutrient absorption, stress physiology, chronic dieting, low carbohydrate intake, inflammation, and autoimmune patterns like Hashimoto’s.
This episode also gets into the low T3 pattern often seen in women who are under-fueled, overtrained, chronically stressed, or poorly recovered, and why that can create thyroid-related symptoms even when the gland itself is not the only issue. You’ll hear why thyroid interpretation should never stop at one number, why antibodies matter long before overt hypothyroidism develops, and why good lab interpretation is about understanding the physiological pattern rather than reacting to one isolated marker.
If you have ever been told your thyroid is normal but still feel exhausted, inflamed, metabolically stuck, or disconnected from your body’s usual response, this episode will give you a more accurate framework for understanding the bigger picture behind thyroid symptoms, hormone dysfunction, and metabolism.
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