T3 Uptake


Decreased: Pregnancy, estrogens, hyperproteinemia, acute intermittent porphyria.
Increased: Androgens, hyperproteinemia, stress, acute liver disease.
This assay is a measure of available thyroid hormone binding sites and should be interpreted with thyroxine levels.

T3 Uptake


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  • Fasting Required: NO
  • Preferred Specimen: Serum
  • Reference Range(s): 22-35 %
  • Turnaround Time: 3 Days
  • Test Code: 861