Thyroid Function Tests

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Related tests: TSH, total T4, total T3, free T4, free T3, Thyroid Antibodies, Calcitonin, Thyroglobulin

At a Glance

Why Get Tested?

To help evaluate thyroid gland function, to help diagnose thyroid disorders and to monitor the response to treatment.

When to Get Tested?

As part of a health checkup or when symptoms suggest hypo- or hyperthyroidism due to a condition affecting the thyroid; following commencement of treatment for disorders of the thyroid gland.

Sample Required?

A blood sample taken from a vein in your arm

Test Preparation Needed?

None needed; however, certain medications can interfere with the tests included in the panel, so tell your doctor about any drugs that you are taking.