Frequently asked question: What is TSH?

TSH is thyroid-stimulating hormone, thyrotropin. TSH is a hormone that is produced by the pituitary (a gland in the brain). TSH ensures that the thyroid gland synthesizes enough thyroid hormone (T4 and T3). If you do not have enough thyroid hormone in your body, the pituitary gland makes more TSH, so that the thyroid gland works harder and makes more thyroid hormone. If you have too much thyroid hormone in your body, the pituitary gland makes less TSH, so that the thyroid gland works slower and makes less thyroid hormone. Purpose: to test the function of the thyroid gland.

Relevant medical information