About the TOTAL THYROXINE (T4)
Adjunct to TSH/FT4 in thyroid disorders.
Sample Required
Blood (venous sample).
Fasting Requirement
No fasting required.
Why is this Test Done?
- Adjunct to TSH/FT4 in thyroid disorders.
General Reference Range
- ~5–12 µg/dL
What Abnormal Results Mean
Elevated/low with changes in binding proteins; free T4 more specific.





