Test Description

Why get tested?

The thyroid panel consists of tests to analyze the functioning of the thyroid gland which is one of the main glands in the body that controls several functions. The thyroid gland in the body synthesizes hormones that are necessary for many functions in the body. The thyroid panel diagnoses the main disorders of the thyroid gland: hyperthyroidism and hypothyroidism. Moreover, the thyroid function panel is used to determine the effectiveness of levothyroxine therapy. This therapy supplements or replaces thyroid hormones that are absent or reduced because of hypothyroidism, goiters, thyroid nodules, or thyroid cancer.
What is being tested?

 The standard thyroid panel measures the following three hormones:

• Total T3 (triiodothyronine) or Free T3

• Free T4 (thyroxine)

• TSH (thyroid stimulating hormone)

Preparation needed?

Before having the thyroid panel, make sure to discuss with the healthcare practitioner any over-the-counter or prescription medications that you take. The tests have to take place before taking any dose of thyroid hormones for the treatment of thyroid diseases. However, no further preparation is necessary for the thyroid panel.

Fasting required?

No