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TBG (Thyroxine Binding Globulin)

$87.00 $57.50
Thyroxine-binding globulin (TBG), a glycoprotein produced in the liver, binds both thyroxine (T4) and triiodothyronine (T3) with high affinity. Because TBG accounts for 76% of plasma protein thyroxine-binding activity, an increase or decrease in its circulating level alters total concentrations of T4 and T3 in blood, leading to potential confusion with true thyroid gland dysfunction. A number of diseases and medications, as well as inherited alterations in TBG gene expression, can change the serum TBG concentration. Measurement of TBG is useful in distinguishing quantitative TBG derangements from thyroid dysfunction. This analyte is elevated with estrogen therapy (especially oral contraceptive agents), during pregnancy and or hepatitis. Serum TBG may be decreased in cirrhosis, in the nephritic syndrome and by androgens.
  • Tests Included:

  • Est. 9 days Turnaround

  • Specimen type:

TBG (Thyroxine Binding Globulin)
  • Test Code: 870
  • CPT Code: 84442
  • Alternate Name: Thyroxine Binding Globulin
  • Test Instructions : None Required
  • Fasting: No
  • Methodology: Immunoassay (IA)
  • Results In: 9

    Note: Turn around times on results are an estimate and are not guaranteed. The lab may need additional time due to holidays, confirmation/repeat testing, etc. You can contact us to discuss when your results should be ready and we will contact the lab on your behalf immediately.

Measuring the amount of TBG in your blood
  • Step 1

    Order
    Your Tests

    Doctor’s order provided & Same Day Testing.

  • Step 2

    Go to
    Local Lab

    Your specimen will be collected for you at a local testing center.

  • Step 3

    Get
    Results

    Results sent electronically in 2-3 days* More complex tests take longer.

  • Step 4

    Make
    Better Decisions

    Use your lab results to help make better health decisions. Knowledge is nothing if it isn’t used.

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