TSH- thyroid stimulating hormone is produced by pituitary gland which is a gland at the base of your brain. TSH hormone regulates the thyroid hormone levels in your body. TSH stimulates thyroid gland for thyroid hormone production and thyroid gland produces and releases 2 thyroid hormones as T3- triiodothyronine and T4-thyroxine.
Thyroid gland is a small, butterfly shaped gland in front of your neck, below the Adam’s apple. Thyroid hormones are important for your metabolic rate. Thyroid hormones have important functions in your body;
Thyroid hormone functions in body
- Metabolic rate
- Carbohydrate metabolism
- Cholesterol level
- Heart rate
- Body temperature
- Baby growth- brain growth during pregnancy
- Energy production
- Bone development
- Blood pressure
TSH- thyroid stimulating hormone is produced in pituitary gland and arrives to thyroid gland, stimulates thyroid gland for thyroid hormone production. TSH hormone regulates the levels of thyroid hormones in your blood.
T3 is the active type thyroid hormone and does the main part of the work. Body converts T4 –throxine to T3 for body usage. TSH stimulates and tells thyroid gland how much T4 will be produced.
TSH level increases or decreases in opposite direction of thyroid hormones. If your thyroid hormones level are low TSH level increases to tell thyroid gland produce more thyroid hormones. If your thyroid gland produces too much thyroid hormones TSH level decreases to reduce production.
TSH normal levels
- Newborn ( under 4 days) : 1-39 mU/L ( miliunits per liter)
- Children: 7-6.4 mU/L
- Adult: 0.4-4.2 mU/L