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Thyroid Function Tests

Meaning

A panel of blood assays used in clinical practice to assess the functional status of the thyroid gland and the regulation of the hypothalamic-pituitary-thyroid axis. These tests typically measure levels of Thyroid-Stimulating Hormone (TSH), free and total thyroxine (T4), and free and total triiodothyronine (T3). The comprehensive analysis of these markers provides critical insight into metabolic rate, energy homeostasis, and the presence of thyroid dysfunction.