T3RU
T3 Uptake isn’t a direct measure of T3—it reflects how much thyroid-binding protein (mostly TBG) is available in your blood. High uptake means less binding protein (more free hormone available), and low uptake means more binding protein (less free hormone). It’s mainly used to help calculate Free Thyroxine Index (FTI) and to interpret T4 levels more accurately. Useful for spotting binding protein imbalances from estrogen, liver issues, or stress.solve real problems with clean design and honest materials.
$6.50 USD