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Comprehensive Thyroid Panel


  1. Thyroid Stimulating Hormone (TSH)
  2. Total T4
  3. Free T4
  4. Free T3
  5. Thyroid Peroxidase Antibodies (TPO)


The thyroid gland is responsible for regulating how your body uses energy through the production of hormones critical to proper cell and system functioning.

There are three main hormones in the thyroid system that should be balanced:

  1. TSH: Thyroid Stimulating Hormone is the most important of the hormones in the thyroid system, this stimulates or acts on the thyroid gland, telling it how much of the actual thyroid hormones need to be made.
  2. T4: Hormone is produced by the thyroid and travels throughout the body and is converted into T3.
  3. T3: The active form of T4.  This is the hormone that goes into the cells and controls their function throughout the body.

A thyroid hormone panel screens for thyroid function and can help diagnose potential thyroid disease by examining your body’s production, levels, or usage of the different thyroid hormones.  There are two types of thyroid and thyroid hormone-related disorders:

  1. Hypothyroidism (underactive thyroid) – symptoms may include fatigue, weight gain, a short attention span, and numbness or cold intolerance.
  2. Hyperthyroidism (overactive thyroid) – symptoms may include weight loss, persistent vomiting, increased blood pressure, hair loss, or a persistently fast heart rate.


If there is a thyroid level imbalance in your body, you may be more susceptible to everything from osteoporosis and heart disease to infertility and fatigue.

Thyroid disorders are more common in women and they often occur with changes in other hormone levels, such as with pregnancy or with older age.


Test Details

The Comprehensive Thyroid Panel is the most complete of the three thyroid panels.  This panel will look at all levels of the various Thyroid Hormones, as well as an estimate of how well they are being taken in or used by the body; but will also include a test for a type of antibodies seen in certain autoimmune diseases of the Thyroid system.  This panel includes the following tests:

  1. Thyroid Stimulating Hormone (TSH)
  2. Total T4
  3. Free T4
  4. Free T3
  5. Thyroid Peroxidase Antibodies (TPO)

Learn More


Am I required to fast?

No, fasting is not required. There are no dietary or medicinal restrictions to take this test.

What is the sample required?

A simple venous blood draw.

Is a doctor's order required?

No. You do not need to provide a doctor’s order to get lab testing done at Any Lab Test Now.

Do I need to make an appointment?

No. You can walk in for same day testing. We make it easy for you by offering work-friendly hours.

If I have questions about my tests results who should I contact?

We recommend you share your results with your physician.