high trh and tsh but klow t3 and t4 Hypothalamic Pituitary Thyroid Axis. Interactions between TRH, TSH, T3, Thyroid Stimulating Hormone (TSH) –
Thyroid Stimulating Hormone (TSH) SiPhox Health Guidelines for Thyroid Testing FLOW CHART OF THYROID FUNCTION TESTS Here's your Flow Chart of Thyroid Function Tests a clear, stepbystep visual to help understand how doctors interpret results and narrow down possible thyroid problems. TSH Thyroid Stimulating Hormone
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