T3 Reverse Test

The reverse T3 test measures the rT3 blood level.

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T3 Reverse Test FAQ

What is Reverse T3?

Reverse T3 is an inactive variant of T3 produced when the body is under stress or during periods of illness or malnutrition. It increases in conditions such as sick euthyroid syndrome and some studies suggest that it may be related to weight gain.

What is a Reverse T3 Test?

A Reverse T3 test is a blood test that checks your Reverse T3 levels.

What type of specimen will I submit?

This T3 Reverse Test is a blood test.

Do I need to fast to take this test?

Fasting is not necessary.

How long does it take to get test results?

It typically takes 6 business days or less.

Accesa Labs does not provide medical advice, diagnosis or treatment. All users should consult with a medical provider for specific health concerns.

Last updated on November 10, 2017

T3 Reverse Test for $99

rT3 Blood Test - More Information

The reverse T3 test, sometimes known as rT3 or reverse triiodothyronine, is a blood test that measures the reverse T3 level. Reverse T3 is a less common form of T3, a hormone produced by the thyroid gland.

Reverse T3 is a hormone produced from the metabolism of T4, or thyroxine. There is some controversy within the medical community as to whether reverse T3 is of value as an adjunct to standard hypothyroidism testing. In particular, many functional medicine practitioners believe that elevated reverse T3 levels result from chronic stress in the body and, consequently, on the thyroid gland. In these situations, an elevated reverse T3 level may represent a form of hypothyroidism that is not identifiable by T4 or TSH testing, particularly when symptoms are present.

The T3 reverse test can be performed with a simple blood draw at a Quest Diagnostics lab near you. Once your T3 lab report is available, it can be downloaded. As can be seen on the sample reverse T3 lab report, the results will be reported as a number and can be compared against the reference range provided by the lab.

T3 Reverse Test at Guaranteed Prices.
Our T3 Reverse Test price includes the following:
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How It Works
1. Order Online
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2. Visit Lab
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