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 days. May take longer based on weather, holiday, or lab delays.
What's Included
Thyroid Panel with TSH
- TSH (Thyroid Stimulating Hormone): Produced by the pituitary gland to stimulate thyroid hormone production, helping identify an underactive or overactive thyroid state.
- T3 Uptake: Evaluates the number of blood proteins that carry thyroid hormones throughout the body.
- T4 (Thyroxine), Total: A hormone made by the thyroid that helps maintain metabolism and other body functions.
- Free T4 Index (T7): A calculated value comparing the amount of unbound (free) T4 to T4 bound to proteins in the blood.
Additional Thyroid Markers
- Free T3 (Triiodothyronine, Free): Evaluates thyroid function and helps assess abnormal binding protein disorders.
- Free T4 (Thyroxine, Free, Direct): May be used when binding globulin issues are suspected or when other results seem inconsistent with clinical observations.
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 test?
This panel offers 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 identify an underactive or overactive thyroid state. This panel is not a standalone diagnostic tool.
2. Who would benefit from this test?
This panel may benefit individuals wanting a broader assessment of thyroid function than a basic panel provides, including those interested in reviewing both bound and free thyroid hormone levels. It may also be useful for people wanting to evaluate possible binding protein related factors as part of a conversation with a healthcare provider.
3. When should I order this panel?
You may consider ordering this panel for a more comprehensive thyroid function screening, or if you want to evaluate both bound and free thyroid hormone levels. It may also be useful when previous thyroid results seemed inconsistent with clinical observations, as part of an ongoing discussion with your healthcare provider.
4. Do I need to fast before this test?
No fasting is required. Stop biotin consumption at least 72 hours prior to collection. Collection should not occur during or after administration of heparin.
5. How quickly will I get results?
Results are typically available in 1-2 days. Turnaround may take longer based on weather, holidays, or lab delays.
6. How do I interpret the results?
Patterns across your TSH, T3 uptake, total T4, Free T4 Index, Free T3, and Free T4 results are often more meaningful than any single value on its own. Reviewing these results together with a healthcare provider can help you better understand what they mean for you.
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.
7. What should I do if my results are abnormal?
If any of your results fall outside the expected range, share them with your healthcare provider. They can help determine whether further testing or follow-up is appropriate based on your individual health history.
8. How often should I get tested?
Testing frequency depends on your individual health needs and goals. Retest as directed by your healthcare provider, especially if you are monitoring thyroid hormone levels over time.
9. Why early detection matters
Regular thyroid monitoring may support earlier awareness of changes in hormone levels over time. Staying informed about your thyroid function can help guide conversations with your healthcare provider, though this panel does not guarantee detection of any specific condition.
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.
