Reverse T3
Reverse T3

Reverse T3

Reverse T3 - the controversial hibernation hormone
Vacutainer Collection by Healthcare Professional Only
Order by 3pm m-f for same day dispatch
Biomarkers Included: 1 - See below for details
Minimum Turnaround Time in working days: 15
Inclusions: Reverse T3
Lab Code: BH215
Free Delivery
Regular price£99.00
Collect 990 Pathology Points worth £9.90 to put towards future testing.

Thank you - 1% from your order total goes towards Our Charity of the Month

A Phlebotomy Only Thyroid Test

The inclusion of Reverse T3 in this blood test means that it is unavailable for fingerprick (microtainer) collection. However we do offer different options for accessing phlebotomy services through this website as part of your online order, or if you already have your own arrangements in place you can simply select this at checkout. If you're unsure about how to access this test or how the procedure works please watch this short video.

Sample Collection Options for your Reverse T3 Test

Phlebotomy - Self Arrange

Cost Dependent on Service

If you already have access to a Friendly Health Care Professional our Reverse T3 Blood Test uses a Standard Vacutainer Kit.

Visit a Partner Clinic

Adds £30 to your Kit Order

We have partnered with Superdrug Pharmacies and Circle Health Hospitals in order to provide you with Accredited Phlebotomy Services.

Find a Clinic

Nurse Home Visits

Adds £55 to your Kit Order

Let our Nurses come to your home or place of work - we cover Mainland England, Wales, Scotland and Northern Ireland. Fully Accredited .

Learn More

Reverse T3 may be raised at times of acute or chronic stress or illness and it is suggested its presence may interfere with the action of Free T3 on the body. There is controversy about the role of Reverse T3 in thyroid illness. Conventional endocrinologists (hormone specialists) generally believe that knowledge of the level of this substance does not influence thyroid treatment decisions. The alternative view however is that Reverse T3 is effectively 'antithyroid'. Free T3 is the active thyroid hormone that stimulates the body's energy system (metabolism). Reverse T3 is a mirror image - it is taken up by cells, and when incorporated it blocks the effect of T3. In this model, Reverse T3 is effectively a hibernation hormone - in times of stress and chronic illness it lowers energy release from the cells. In this scenario, a normal thyroxine level measured when Reverse T3 is high may mask hypothyroidism.

Please be aware that Reverse T3 samples are sent to USA for analysis so turnaround time is prolonged. This test is available as a vacutainer sample collection option. You can choose to visit a Circle Hospital or Superdrug venue to give the sample, or have a Nurse Home Visit. Select your preferred option at checkout.

Special Instructions:
Laboratory Notes: Reverse T3

Thyroid Resources

Navigating Hypothyroidism Diagnosis
Thyroid Blood Tests - Fingerprick or Whole Blood?
Testing for an Overactive or Underactive Thyroid
Quick and Reliable.

There's a reason that over 30% of Blue Horizon Kit requests are from patients that have used us before.

Blue Horizon Blood Test Reviews


Extremely efficient service from beginning to end. Procedure carried out quickly and efficiently. Results were very swift. Will be using again.

Lisa Underhill-Price

Impressed with speed of despatch after ordering. Kit and instructions very easy to understand and follow. Posted back to lab Monday morning, results received Wednesday morning, Thanks, may well be back soon.

Paula Loftus

As always, a superb service by all the BH team. Fast, efficient but very thoughtfuland caring of medical conditions, and associated patient mindset.. highly reccomended .cg

Chris Gomez

Utterly patient, kind and helpful, kit arrived next day, as did my results. 5 stars well-deserved.

Dell Finniam

Great service and product. The turn around is brilliant (mostly - there was a glitch during the early part of the Covid pandemic, but that seems to be resolved now). Tests are recognised by the medical profession so I am able to use the results to get the treatment I need without further tests.

Alexis Faulkner

I had various questions which they answered via email/webchat and the timing of getting a kit, sending it back and getting the results was good.

Bruce Robins

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