Normal Thyroid Labs but Still Cold, Tired, and Foggy?
Your TSH is fine. Your T4 is fine. You are cold, exhausted, and foggy, and your bloodwork says your thyroid is perfect. You are not imagining it. Thyroid hormone can be sitting in your blood and still failing to work inside your cells, where the test cannot reach. Here is the mechanism, the readout you can measure yourself, and what actually moves it.