FT3
Also Known As: Thyroxine (T4) and triiodothyronine (T3)
Consult for FT3 at
Samyak.
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About the Test
Description:
T4 is made by the thyroid gland and converted to T3 by the liver. These hormones control energy production (metabolic rate) in tissues.
Clinical Significance:
As follow up to an abnormal TSH test. Laboratory tests may measure either the total hormone or free hormone (not bound to protein)
More about Tests
Learn more about laboratory testing
Target Levels (where applicable)
REFERENCE INTERVALS FOR ADULTS:
FT3: 1.71-3.71 pg/ml
FT4: 0.70-1.48 ng/dl.
What is being checked
INCREASE IN: Hyperthyroidism
DECREASE IN: Hypothyroidism