Reverse T3 Lab Test

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reverse-t3
$65.12

First time customer? Read How Discounted Labs Works 

IMPORTANT NOTICE ABOUT DISCOUNTED LABS SERVICES: We currently serve the following states:

Alabama, Arizona, California, Colorado, Connecticut, Florida, Georgia, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, North Carolina, New Mexico, Ohio, Oregon, Pennsylvania, South Carolina, Tennessee, Texas, Utah, Virginia, Washington, and West Virginia.

Other states will be added in the coming months, so please subscribe to our newsletter on the website footer to be notified.

You will earn 65 Points for purchasing this product.

The reverse T3 test has to be done at the same time you do the free T3, and you then measure the ratio between the two by dividing the RT3 into the Free T3. The body produces the benign RT3 naturally to rid itself of excess of T4, but in some cases, such as high or low cortisol, RT3 is produced in excess which can clog cell receptors from receiving T3. FT3 is usually twenty or more times higher than RT3.

The reverse T3 (rT3) test has to be done at the same time you do the free T3, and you then measure the ratio between the two by dividing the RT3 into the Free T3. The body produces the benign RT3 naturally to rid itself of the excess of T4, but in some cases, such as high or low cortisol, RT3 is produced in excess which can clog cell receptors from receiving T3. FT3 is usually twenty or more times higher than RT3.

 The rT3 level tends to follow the T4 level: low in hypothyroidism and high in hyperthyroidism

· Increased levels of rT3 have been observed in starvation, anorexia nervosa, severe trauma and hemorrhagic shock, hepatic dysfunction, postoperative states, severe infection, and in burn patients (i.e., "sick euthyroid" syndrome)

· This appears to be the result of switchover in deiodination functions with the conversion of T4 to rT3 being favored over the production of T3

· The Journal of Clinical Endocrinology & Metabolism states that “the T3/rT3 ratio is the most useful marker for tissue hypothyroidism and as a marker of diminished cellular functioning.

 

NOTE: If you are taking biotin, please stop it 72 hours before the blood draw since it may interfere with hormone blood tests.

 


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IMPORTANT: Discounted Labs only serves these states: Find a Location 

Please read the following frequently asked questions before placing an order: FAQs

 

HOW DOES DISCOUNTEDLABS.COM WORK?

  1. Go to the "Find a Location" page to find the closest lab location. No need to make an appointment since walk-ins are welcomed. Once you have identified your closest location, go to step 2.

    NOTE: We serve all states in the U.S. except New York, New Jersey, and Rhode Island. Residents of those states need a written lab order from an in-state provider. Individuals cannot obtain a blood draw in neighboring states.
  2. Go to "Choose a Test" and add your selection (s) in the shopping cart. If you prefer to save money on bundled tests, we have created "Lab Test Panels" that can help you decide what to order.

  3. If you have a discount coupon code, add it to your cart.

  4. A $8 lab processing fee will be added to your total.

  5. Pay using a credit card.

  6. You will receive an order confirmation and instructions email on how to download your lab request.

  7. Print lab request form that you downloaded.

  8. Take that form to the closest Quest Diagnostics location with a picture ID. Get your blood drawn.

  9. You will receive an email when the results are ready for you to download.

    Note: You cannot place an order under someone else's profile. The profile person's name will appear on the lab order form.

    If you have questions, please review our FAQ Page.

    If you have further questions, please email [email protected].

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