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Thyroid Binding Globulin – TBG

$89.00 $119.00

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Our thyroid binding globulin test will help determine the cause of abnormal T4 levels. Thyroid binding globulin does bind T3 in the blood but mainly T4. If large amounts of thyroid binding globulin are present, the body will not have enough free, or usable, T4 to function properly.

Thyroid Binding Globulin is Increased by:

  1. estrogens, including birth control pill, premarin and environmental estrogens
  2. tamoxifen
  3. pregnancy
  4. perphenazine
  5. liver disease, including hepatitis
  6. genetic factors

Thyroid Binding Globulin is Decreased by:

  1. chronic liver disease
  2. nephrosis (kidney)
  3. glucocorticoids
  4. androgens/anabolic steroids (e.g. cortisone shots)
  5. acromegaly (enlarged tissue due to increased growth hormone)

What’s Being Tested:

  • Thyroid Binding Globulin (TBG)

Fasting: No

Specimen: Blood(Draw Location | How It Works | FAQs)

comments: Excited to be able to order an OAT without a dr order

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Chris Garcia

comments: Your customer service is excellent - responsive and goes the extra mile. Worked with Rachel, who was terrific. The website lagged a lot, but may be new year's eve traffic. Also, a coupon supposed to expire on 1/1/22 did not work when ordered on 12/31/21. Overall however, your service and availability of labs, which is most important, is excellent.

Carolyn Boyd

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