Specimen: Blood

Results: 1-3 business days

Description:  T3 uptake is an indirect measure of the quantity of thyroxine binding proteins (thyroid binding prealbumin, albumin, and TBG) in plasma. It is directly proportional to the degree of saturation of the binding proteins by thyroxine. T3U is decreased during pregnancy, with supra-normal doses of estrogen, early in acute hepatitis, and with genetic TBG excess. It is increased by anabolic hormones and glucocorticoids, the nephrotic syndrome, and genetic TBG deficiency.

*Please note: The result turn around time is an estimate only and not guaranteed. The reference lab may need additional time due to conditions with the weather, confirmation or repeat testing, or equipment maintenance and other reasons out of our control.