Thyroid Dysfunction Explained: Why Symptoms Persist Despite Normal Lab Results

Persistent fatigue, weight gain, brain fog, and cold intolerance can occur even when TSH and standard thyroid labs appear normal. This guide explains T4-to-T3 conversion, reverse T3, stress physiology, nutrient deficiencies, and how a root-cause approach evaluates thyroid dysfunction beyond basic testing.

Functional medicine, Hormone Health, Hormones, Thyroid Health, Women's HealthMartina SturmJanuary 12, 2026Denver Sports and Holsitic MedicineThyroid Dysfunction, Normal Thyroid Labs, Persistent Thyroid Symptoms, Reverse T3, T4 to T3 Conversion, HPT Axis, Subclinical Hypothyroidism, Functional Thyroid Evaluation