TBG; THYROXINE BINDING GLOBULIN

THE THYROXINE-BINDING GLOBULIN (TBG) TEST MEASURES THE LEVEL OF A PROTEIN IN YOUR BLOOD THAT CARRIES THYROID HORMONES. TBG HELPS TRANSPORT THYROXINE (T4) AND TRIIODOTHYRONINE (T3), THE PRIMARY HORMONES PRODUCED BY THE THYROID GLAND, THROUGHOUT YOUR BODY. THESE HORMONES REGULATE METABOLISM AND OTHER IMPORTANT BODILY FUNCTIONS. A TBG TEST IS USED TO ASSESS THYROID FUNCTION, PARTICULARLY WHEN TOTAL T4 AND FREE T4 LEVELS ARE ABNORMAL. IT HELPS DETERMINE IF THE THYROID GLAND ITSELF IS FUNCTIONING PROPERLY OR IF THE ISSUE LIES WITH THE AMOUNT OF TBG AVAILABLE TO TRANSPORT THE HORMONES.