Service Description

The Thyroid-Binding Globulin (TBG) test measures the level of TBG, a protein that binds thyroid hormones in the blood, helping regulate hormone availability and activity. Why it’s done: To evaluate thyroid hormone transport and availability To help diagnose thyroid disorders or hormone imbalances To investigate abnormal thyroid hormone levels despite normal TSH To support monitoring of thyroid therapy or hormone replacement To assess overall endocrine health Specimen Type: Blood draw Turnaround Time: Typically 2–5 business days Collection Available: In-office or mobile blood draw services