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.
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- WHAT IT TESTS: Measures T3 levels.
- WHY TAKE IT: Assess thyroid function.
- REQUIRES FAST? No.