Serum TSH Levels

Serum TSH (thyroid-stimulating hormone) levels measure the amount of TSH in your blood, which is produced by the pituitary gland to regulate your thyroid gland. TSH helps control the production of thyroid hormones that influence your metabolism, energy, and overall health. An abnormal TSH level can indicate thyroid dysfunction: high TSH may suggest hypothyroidism (underactive thyroid), while low TSH could point to hyperthyroidism (overactive thyroid). Doctors use TSH tests to diagnose thyroid conditions, monitor treatment effectiveness, and guide appropriate management.