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Thyrotropin

Thyrotropin, also known as Thyroid Stimulating Hormone (TSH) is a very important hormone produced by the pituitary gland. One of the pituitary gland's main jobs in your body is to regulate the level of thyroid hormone in the blood by secreting more or less Thyrotropin.  Thyrotropin or TSH is released from the pituitary gland and travels to the thyroid gland where it stimulates the thyroid to make more thyroid hormone (T3 or T4).  Thyroid hormones (T3 and T4) are very important to such things as body metabolism in people of all ages and to growth and maturation in children.   


A Thyrotropin test (TSH) is often conducted to screen for and help diagnose thyroid disorders such as hypothyroidism or hyperthyroidism:  


High levels of Thyrotropin or Thyroid stimulating hormone (TSH) are seen in hypothyroidism.  Your pituitary gland makes more TSH when you have low thyroid hormone levels as it is trying to tell your thyroid gland to make more thyroid hormone. 


Low levels of Thyrotropin or Thyroid stimulating hormone (TSH) are seen in hyperthyroidism.  Your pituitary gland makes less TSH when you already have high levels of thyroid hormones in your blood. 

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