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Reverse T3 (rT3) Test

The reverse T3 blood test is used to help determine if an individual has sick euthyroid syndrome. Reverse T3 (rT3) is a byproduct of thyroid hormone metabolism. Reverse T3 is biologically inactive and does not stimulate thyroid hormone receptors. If you suspect of thyroid dysfunction usually the thyroid tests that are completed are TSH, T3, and T4. The reverse T3 is added to gather more information regarding your thyroid health.

Test Details

The test result will show a numeric value of your reverse T3.

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FAQs

Am I required to fast?

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

WHAT IS THE SAMPLE REQUIRED?

A simple venous blood draw.

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 primary care physician or with your specialist (Endocrinologist).