Thyroid Panel
Thyroid Panel
Thyroid Panel
Thyroid Panel
Thyroid Panel
Thyroid Panel
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Thyroid Panel

Thyroid Panel

T4 and T3 are hormones produced by the thyroid gland. They help control the rate at which the body uses energy, and are regulated by a feedback system. TSH from the pituitary gland stimulates the production and release of T4 (primarily) and T3 by the thyroid. Most of the T4 and T3 circulate in the blood bound to protein. A small percentage is free (not bound) and is the biologically active form of the hormones.

Laboratory tests can measure either total amount of hormone (bound plus unbound) or just the free portion. The free T4 test is thought by many to be a more accurate reflection of thyroid hormone function and, in most cases, its use has replaced that of the total T4 test. However, some professional guidelines still recommend the total T3 test so either free T3 or total T3 may be ordered by a health practitioner.

Methodology
    Immunoassay (IA)
Clinical Significance
    For diagnosis of hypothyroidism and hyperthyroidism.
Alternative Names
    Thyroid Function Panel, T3, T4, Thyroxine
Regular price $ 149.00