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biological

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TSH

TSH TSH, or thyroid-stimulating hormone, is a key hormone in the hypothalamic-pituitary-thyroid axis and is highly sensitive to changes in thyroid balance.

TSH, or thyroid-stimulating hormone, is a key hormone in the hypothalamic-pituitary-thyroid axis and is highly sensitive to changes in thyroid balance. Because it often shifts before FT3 or FT4 do, it is commonly used as a primary screening marker of thyroid dysfunction in clinical and research settings.