Lab Testing

Product Description

Please note, this test is performed by LabCorp and will not require a physical test kit to complete your draw. DHA Laboratory will send you a list of local LabCorp Patient Service Centers, patient prep instructions and a requisition form via email. Please print the requisition form and bring that in with you to LabCorp to complete your draw. If you have any questions about the tests, the testing process, or need help with your lab order at any time, please feel free to contact DHA Laboratory at T: (847) 222-9546 / E: info@dhalab.com

**Note: All laboratory testing requires an authorizing physician. DHA Laboratory offers a patient direct program that partners you with an authorizing physician. If you have any additional questions regarding the availability of testing, please contact our laboratory by telephone or email.**

Sample Type: Serum

Turnaround Time: 1 Week

Performing Laboratory: LabCorp

Thyroxine binding globulin (TBG) is the high-affinity serum binding protein for thyroxine and triiodothyronine. Normally, the thyroid adjusts to changing concentrations of TBG by producing more, or less, thyroid hormone to maintain a constant level of metabolically important free hormone.

Elevated TBG levels are associated with influences such as pregnancy, genetic predisposition, oral contraceptives, and estrogen therapy. TBG levels can decrease with androgenic or anabolic steroids, large doses of glucocorticoids, hypoproteinemic states, liver disease, nephrotic syndrome, and congenital TBG variants.