Quick Facts
- Sample: Blood
- Fasting: No fasting is required. Stop biotin consumption at least 72 hours prior to collection. Collection should not occur during or after administration of heparin.
- Turnaround: 2-3 business days. May take longer based on weather, holiday, or lab delays.
What's Included
Thyroid Panel with TSH
- T3 Uptake: Measures thyroid hormone-binding capacity and helps evaluate thyroid function when used alongside total T4.
- T4 (Thyroxine), Total: Measures the total amount of thyroxine in the blood, including both bound and unbound forms, to help assess thyroid function.
- Free Thyroxine Index (T7): A calculated value derived from total T4 and T3 uptake that helps estimate free thyroid hormone levels.
- Thyroid-Stimulating Hormone (TSH): Measures the hormone produced by the pituitary gland that regulates thyroid hormone production. Helps evaluate thyroid function and identify potential thyroid disorders.
T3, Free
T4, Free
Thyroid Peroxidase (TPO) Antibodies
Thyroid Peroxidase (TPO) Antibodies: Detects antibodies against thyroid peroxidase, an enzyme involved in thyroid hormone production. Helps identify autoimmune thyroid conditions, including Hashimoto's thyroiditis.
Thyroglobulin Antibodies (TAA)
Benefits
- Evaluates overall thyroid hormone production and activity.
- Assesses pituitary gland function through TSH measurement.
- Detects thyroid antibodies linked to autoimmune thyroid conditions.
- Supports monitoring of existing thyroid treatment.
- Provides a broad, detailed view of thyroid health in one panel.
Who Is This Test For?
- Individuals experiencing possible signs of thyroid imbalance.
- Those wanting a detailed evaluation of thyroid hormone levels.
- People monitoring existing thyroid treatment or management.
- Individuals with other autoimmune conditions who want thyroid involvement assessed.
- Those seeking a broader thyroid antibody and hormone evaluation.
How It Works
- Order Your Test Online
- Visit a Local Lab
- Get Results Online
FAQ
1. What is the purpose of this panel?
This panel provides a detailed look at thyroid function by combining hormone measurements (TSH, Total T4, Free T4, Free T3, T3 Uptake, and Free T4 Index) with thyroid antibody testing (TPO and Thyroglobulin Antibody). Together, these markers help evaluate thyroid and pituitary function and possible autoimmune activity. This panel does not diagnose a condition on its own.
2. When might I consider ordering this panel?
You may consider this panel if you want a broader thyroid evaluation, are following up on previous thyroid results, or are monitoring an existing thyroid treatment plan. It may also be useful for people with autoimmune conditions who want thyroid involvement evaluated.
3. Do I need to fast or prepare before this test?
Fasting is not required. Stop taking biotin at least 72 hours before collection, and do not collect the sample during or after heparin administration.
4. How quickly will I get results?
Results are typically available in 2–3 days. Weather, holidays, or laboratory delays may extend this timeframe.
5. How do I interpret the results?
Thyroid results are often most meaningful when viewed as a pattern across multiple biomarkers rather than as individual values. Hormone and antibody levels can interact, so a healthcare provider is best placed to interpret your complete results in context.
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.
6. What should I do if my results are outside the expected range?
Share your results with your healthcare provider. They can determine whether further testing, monitoring, or follow-up care is appropriate for your situation.
7. How often should I get tested?
Testing frequency depends on your health history and goals. Follow your healthcare provider’s guidance on an appropriate testing schedule.
Pre-test preparation
No fasting is required. Stop biotin consumption at least 72 hours prior to collection. Collection should not occur during or after administration of heparin.
Do not stop prescribed medication unless instructed by your healthcare provider.
