Thyroid Stimulating Hormone (TSH)

The Thyroid Stimulating Hormone (TSH) test measures the level of TSH in the blood. TSH is produced by the pituitary gland and plays a crucial role in regulating the thyroid gland’s production of hormones, T3 (Triiodothyronine) and T4 (Thyroxine), which control the body’s metabolism, energy production, and growth.

Purpose of the Test:

•Diagnose thyroid disorders: Detects hypothyroidism (underactive thyroid) or hyperthyroidism (overactive thyroid).

•Monitor thyroid treatment: Ensures appropriate dosing of thyroid hormone replacement therapy or medications for hyperthyroidism.

•Screen for thyroid dysfunction: Commonly part of routine health checkups, especially in individuals at risk for thyroid issues.

Conditions Indicated by Abnormal TSH Levels:

•High TSH Levels (Hypothyroidism): The thyroid gland is underactive and not producing enough T3 and T4. Common causes include Hashimoto’s thyroiditis or iodine deficiency.

•Low TSH Levels (Hyperthyroidism): The thyroid gland is overactive, producing excess T3 and T4. Common causes include Graves’ disease or thyroid nodules.

Key Notes:

•TSH levels are often paired with T3 and T4 tests for a complete thyroid profile.

•Regular monitoring is recommended for individuals with thyroid disorders or on thyroid medications.