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Thyroid Test Panel with TSH (Thyroid Stimulating Hormone) Popular

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About Our Thyroid Test Panel with TSH (Thyroid Stimulating Hormone)

Note: Fasting is not required for this test.

The thyroid is an endocrine gland that not only controls metabolism, but also secrete hormones that are necessary for growth and development. These hormones stimulate the metabolism of nearly every tissue in the body.

Our Thyroid Panel with TSH measures the following four thyroid levels:

  • T3 uptake (Triiodothyronine) - T3 is the active form of T4. This hormone informs cells to use digested food as energy, rather than store it as fat.
  • T4 (Total Thyroxine) - A total T4 test measures the T4 that has bonded to protein and the free (unbonded) T4 in the blood.
  • T7 (Free Thyroxine Index) - This measurement is a calculation of T4 and T3 uptake.
  • TSH (Thyroid Stimulating Hormone) - TSH is a hormone secreted by the pituitary gland. TSH stimulates the thyroid to produce thyroxine (T4) and ultimately triiodothyronine (T3).

This blood test is used to evaluate the thyroid's function and/or symptoms of an overactive thyroid (hyperthyroidism) or an under active thyroid gland (hypothyroidism). Hashimoto's thyroiditis is the most common cause of hypothyroidism, and is often tested for with numerous thyroids tests, including TSH, Free T4 and Anti-Thyroid Antibody tests.


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