LabwiseT3 Uptake%
T3 uptake is an older test of thyroid hormone binding proteins, used to calculate the free thyroxine index.
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What T3 Uptake measures
T3 uptake is an older test of thyroid hormone binding proteins, used to calculate the free thyroxine index.
If your T3 Uptake is low
A lower T3 uptake is commonly associated with higher binding proteins, as in pregnancy or with estrogen.
Commonly associated with
- Pregnancy or estrogen
- Underactive thyroid
If your T3 Uptake is high
A higher T3 uptake is commonly associated with lower binding proteins or an overactive thyroid.
Commonly associated with
- Overactive thyroid
- Low binding proteins
Typical reference range
| Group | Typical range |
|---|---|
| Adults | 24 – 39 % |
Typical adult values used by many US labs. Your own report prints the range your lab validated for its method, and that range is the one that counts. Labwise always uses the printed range first.
If it is within range
Your T3 uptake is within the range printed by your lab.
Also listed as
Thyroid Hormone Binding Ratio, T-Uptake
Related tests
This page is general information about what a laboratory test measures and what results outside a reference range are commonly associated with. It is not medical advice, does not diagnose any condition and does not replace your clinician. Discuss your results with your healthcare provider.