The TSH test, or Thyroid-Stimulating Hormone test, is a blood test used to assess the functioning of the thyroid gland. The thyroid gland, located in the neck, produces hormones that play a crucial role in regulating metabolism, energy production, and the functioning of various organs. TSH is a hormone produced by the pituitary gland that stimulates the thyroid to produce thyroid hormones, primarily T4 (thyroxine) and T3 (triiodothyronine).

Sample type:  Blood
Preparation:  Fasting is not required.

Price: $37


The TSH (Thyroid-Stimulating Hormone) test is a vital tool in assessing the health of the thyroid gland, a small but powerful organ with a significant impact on metabolism and overall well-being. Produced by the pituitary gland, TSH plays a pivotal role in regulating the thyroid’s hormone production, influencing energy levels, metabolism, and various bodily functions.

  • The reference range for TSH levels can vary slightly between laboratories, but in general, normal levels are typically between 0.4 and 4.0 milliunits per liter (mU/L).
  • High TSH levels may indicate hypothyroidism, a condition where the thyroid is underactive and not producing enough hormones.
  • Low TSH levels may suggest hyperthyroidism, an overactive thyroid that produces an excess of thyroid hormones.
  • Normal TSH levels within the reference range generally indicate normal thyroid function.
  • The TSH test is commonly used to diagnose and manage thyroid disorders, such as hypothyroidism and hyperthyroidism.
  • It is often used in conjunction with tests for thyroid hormones (T4 and T3) to provide a comprehensive assessment of thyroid function.
  • The TSH test is also used to monitor individuals receiving thyroid hormone replacement therapy.