What We Test
The following are included in this test:
TSH: Produced by the pituitary gland, TSH acts on the thyroid gland to stimulate
production of the thyroid hormone thyroxine (T4).
Free T4 – Thyroxine: The predominant hormone produced by the thyroid gland, T4 is
converted to its active form, T3, within cells.
Total T4 – Thyroxine: Total T4 includes both free T4 and protein-bound T4, and is an
indicator of the thyroid gland’s ability to synthesize, process and release T4 into the
bloodstream.
Free T3 – Triiodothyronine: T3 is the active thyroid hormone that regulates the metabolic
activity of cells.
TPOab – Thyroid Peroxidase Antibodies: Thyroid peroxidase is an enzyme involved in
thyroid hormone production. The body produces antibodies, including TPOab, that attack
the thyroid gland in autoimmune thyroiditis and Hashimoto’s. Testing TPOab levels can
diagnose these conditions.
Tgbn – Thyroglobulin: A protein rich in tyrosine, the residues of which when bound to
iodine become the building blocks of T3 and T4. If iodine levels are low, thyroglobulin
accumulates, thus high levels indicate insufficient iodine for healthy thyroid function.
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