What is TSH (thyroid-stimulating hormone)?
TSH, or thyroid-stimulating hormone, is a hormone produced by the pituitary gland that plays an important role in the body's hormone system. TSH stimulates the thyroid gland to produce the hormones thyroxine T4 Free and triiodothyronine (T3). These hormones are important for regulating the body's energy balance, metabolism and heat regulation.
Why analyze TSH?
The TSH levels in the blood can be measured to diagnose various thyroid diseases and to check that the treatment of these diseases is effective.
What can a low value of TSH due to?
A low value of TSH can be due to the body producing too much of the hormones thyroxine (T4) and triiodothyronine (T3). This can be a sign of hyperthyroidism, which is an overactive thyroid gland.
What can a high value of TSH due to?
A high value of TSH can be due to the body producing too little of the hormones thyroxine (T4) and triiodothyronine T3 Free. This could be a sign of hypothyroidism, which is an underactive thyroid gland.