Thyroxine Binding Globulin (TBG) test is a blood test that measures the levels of thyroxine-binding globulin in the blood. TBG is a protein that binds to thyroid hormones in the bloodstream and helps transport them to different parts of the body. A TBG test is usually ordered as a part of the evaluation of thyroid function. The test is particularly useful in assessing thyroid function in people with suspected thyroid disorders, such as hyperthyroidism or hypothyroidism. Abnormal levels of TBG in the blood can indicate an underlying thyroid problem or other health conditions, such as liver disease or hormonal imbalances. The TBG test is a simple and safe procedure that can provide important information about a person’s thyroid health.
