Free T3 & Free T4
T3 الحر و T4 الحر
Sample Type
🧪 Blood
Results In
⏱ 24 Hours
Fasting
✅ Not Required
Parameters
📊 2
What is Free T3 & Free T4?
Measures the unbound (free) forms of thyroid hormones T3 and T4, providing a more accurate assessment of thyroid function than total T3/T4 levels.
Why is this test important?
Free hormones are the biologically active forms. Free T4 is the primary thyroid screening test alongside TSH. Free T3 is particularly useful in diagnosing T3 thyrotoxicosis.
How to Prepare
No fasting required. Inform your doctor about any thyroid medications.
Test Parameters & Normal Ranges
| Parameter | Normal Range | Unit |
|---|---|---|
| Free T3 | 2 – 4.4 | pg/mL |
| Free T4 | 0.8 – 1.8 | ng/dL |
Frequently Asked Questions
Do I need to fast before my blood test?▼
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Medical Disclaimer: The information on this page is for educational purposes only and should not be considered medical advice. Always consult your physician or qualified healthcare provider for diagnosis and treatment. Test results should be interpreted by a qualified medical professional.