Free Thyroxine

Free T4 measures the free, unbound thyroxine levels in your bloodstream. Free T4 is typically elevated in hyperthyroidism, and lowered in hypothyroidism. Free or unbound T4 levels represent the level of hormone available for uptake and use by cells. Because the free levels of T4 represent immediately available hormone, free T4 is thought to better reflect the patient’s hormonal status than total T4.

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Am I required to fast?

No, fasting is not required. There are no dietary or medicinal restrictions to take this test.

Is a doctor's order required?

No. You do not need to provide a doctor’s order to get lab testing done at Any Lab Test Now.

Do I need to make an appointment?

No. You can walk in for same day testing. We make it easy for you by offering work-friendly hours.

If I have questions about my tests results who should I contact?

We recommend you share your results with your physician.

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Constant Upset Stomach?

Free Thyroxine

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