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Reverse T3

NOTE: Multiple lab options. Use our Lab Locator to find closest.

Reverse T3

Laboratory: LabCorp
Reverse T3
Laboratory: Quest Diagnostics

Under normal conditions, the body converts T4 to T3 and RT3 in specific ratios. In certain circumstances, the amount converted to RT3 rises, such as when the body is under stress, as in cases of serious or acute illness or physical injury. Increased levels of RT3 have been noticed in severe trauma, severe infection, starvation, anorexia, as well as after surgery. RT3 levels alone may not be indicative of a thyroid condition, so this test may be ordered with other thyroid hormones such as TSH, T4 and T3.

1. Purchase Tests

Choose the test you want (be sure to pick the laboratory you want to use).

Pay by credit card or PayPal®.

You pay directly and we do not bill your insurance.

(Note: A $10 laboratory fee is added to your total when you purchase one or more blood tests.)

2. Visit a Lab

After purchasing your testing you will receive an email with your lab requisition.  Bring this form to the laboratory.

NOTE: Be sure to visit the appropriate laboratory! 

If you choose LabCorp only visit a Labcorp location. 
If you choose Quest Diagnostics only visit a Quest location!

Find Your Lab Location.

No appointment is needed, but making one can minimize your wait time. 

If you have selected the option to have an At Home Test Kit delivered to you, you will receive your test kit in the mail within 5 to 7 business days. (Not all tests are available as At Home Test Kits.)

3. Get Results

We’ll email you when your results are ready. Sign into your account to view and download your result reports.

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