Dr. Thomas Panel #2 Blood Test

Quick Facts

• Sample: Blood
• Fasting: Fasting (except water) for at least 8 hours is required.
• Turnaround: 8-10 business days. May take longer based on weather, holiday, or lab delays.

What's Included

• Tri-iodothyronine (T3): Measures total T3, a thyroid hormone that helps regulate energy use and metabolism.
• Reverse T3, Serum (LC/MS/MS): Measures reverse T3, an inactive form of T3 that may increase during illness or physical stress.
• Tri-iodothyronine (T3), Free: Measures unbound T3, the active thyroid hormone available for use by the body.
• Thyroxine (T4), Free (Direct): Measures unbound T4, a thyroid hormone that the body can convert into active T3.
• Thyroid-stimulating Hormone (TSH):  A hormone produced by the pituitary gland that regulates thyroid hormone production. Helps evaluate thyroid function and identify potential thyroid disorders.
• Thyroglobulin Antibody (TAA): Measures antibodies that attack thyroglobulin, a protein the thyroid uses to make hormones. This test helps detect autoimmune thyroid conditions.
• Thyroid Peroxidase (TPO) Antibodies: Measures antibodies that attack thyroid peroxidase, an enzyme needed to make thyroid hormones. This test helps detect autoimmune thyroid conditions, such as Hashimoto’s disease.

Benefits

• Measures key thyroid hormones, including T3, free T3, free T4, and TSH.
• Includes reverse T3, a marker of thyroid hormone balance and stress response.
• Checks two thyroid antibodies, TPO and thyroglobulin, that relate to autoimmune thyroid conditions.
• Combines hormone and antibody results to give you a fuller view of thyroid health.
• Gives you information to discuss with your healthcare provider.

Who Is This Test For?

• You have symptoms such as fatigue, weight changes, or mood changes.
• You have a family history of thyroid disorders or autoimmune diseases.
• You are being monitored for thyroid conditions or undergoing thyroid treatment.
• You want to look more closely at thyroid hormones and thyroid antibodies together.

How It Works

1. Order Your Test Online
2. Visit a Local Lab
3. Get Results Online

FAQ

1. Do I need to fast or prepare for this test?

Yes. Fasting (except water) for at least 8 hours is required before your blood draw.

2. How quickly will I get results?

Plan on 8-10 business days. May take longer based on weather, holiday, or lab delays.

3. What can my results tell me?

Think of this panel as two lenses on the thyroid. The hormone tests show how much thyroid hormone is circulating and how the body is regulating it, while the antibody tests show whether the immune system is targeting thyroid proteins. Looking at both together offers context that either group alone would not.

4. How do I interpret the results?

Meaning comes from the pattern across all seven results, not from any single number. Each marker answers a different question, so values will not necessarily move together. Your symptoms, medical history, medications, and how you prepared for the draw all add context. One abnormal or normal value cannot confirm or rule out a condition on its own. Review your full set of results with a qualified healthcare provider.

Disclaimer: Reference ranges may vary by laboratory. Listed ranges are general guidelines and may differ from those used by the performing lab. Always consult your healthcare provider for interpretation.

5. What should I do if my results are abnormal?

Try not to draw conclusions from one flagged value. Share your complete results with a qualified healthcare provider, who can interpret them alongside your health history and any patterns across the panel. Your provider will decide whether any further evaluation makes sense for you.

Pre-test preparation

• Fasting (except water) for at least 8 hours is required.