Quick Facts
- Sample: Blood
- Fasting: No fasting required. Stop biotin consumption at least 72 hours prior to collection. Collection should not occur during or after heparin administration.
- Turnaround: 1-2 business days. May take longer based on weather, holiday, or lab delays.
What's Included
Thyroid Panel with TSH
- 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 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.
T3, Free
T4, Free
Benefits
- Evaluates thyroid function through six key biomarkers.
- Helps identify an underactive or overactive thyroid state.
- Includes both bound and free thyroid hormone measures.
- Supports assessment of possible binding protein disorders.
- Offers fast turnaround with minimal preparation.
Who Is This Test For?
- Individuals wanting a more comprehensive thyroid function assessment.
- People whose prior thyroid results seemed inconsistent with symptoms.
- Individuals interested in evaluating binding protein-related factors.
- Those wanting to review both bound and free thyroid hormones.
- People following up on thyroid concerns with a healthcare provider.
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 comprehensive look at thyroid function by combining a core thyroid panel (TSH, T3 Uptake, Total T4, and Free T4 Index) with Free T3 and Free T4 testing. Together, these biomarkers help evaluate thyroid hormone levels and possible underactive or overactive thyroid states. This panel is not a standalone diagnostic tool.
2. When might I consider ordering this panel?
You may consider this panel if you want a broader thyroid assessment than a basic panel provides, including a review of bound and free thyroid hormone levels. It may also be useful when previous thyroid results appear inconsistent with clinical observations or when discussing possible binding-protein-related factors with a healthcare provider.
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 1–2 days. Weather, holidays, or laboratory delays may extend this timeframe.
5. How do I interpret the results?
Patterns across TSH, T3 Uptake, Total T4, Free T4 Index, Free T3, and Free T4 are often more meaningful than one value alone. Review the full set of results with a healthcare provider to understand what they may mean in your individual 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 or follow-up is appropriate based on your health history.
7. How often should I get tested?
Testing frequency depends on your health needs and goals. Retest as directed by your healthcare provider, especially when monitoring thyroid hormone levels over time.
Pre-test preparation
No fasting is required. Stop biotin consumption at least 72 hours prior to the collection. Collection should not occur during or after administration of heparin.
