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Thyroxine Free (Free T4) (FT4)

Measures the unbound (active) portion of thyroxine that can enter tissues, giving a clearer picture when binding proteins are abnormal.

฿156.00

Measures the unbound (active) portion of thyroxine that can enter tissues, giving a clearer picture when binding proteins are abnormal.

Blood

15 min at lab

Results: 1 day

Typical Use

Used with TSH to diagnose and monitor thyroid disorders, especially when pregnancy, liver disease, or certain medicines may alter thyroid-binding proteins.

Preparation

Wear clothing that allows easy access to your arm

Arrive well-hydrated

Continue regular medications unless advised otherwise by your doctor

Markers Tested

Free T4 (ng/dL)

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