Laboratory test
Total thyroxine (T4)
Test code · ИМ.003
Total T4 measures the combined amount of free and protein-bound thyroxine, one of the main thyroid hormones.
- Specimen
- Blood serum
- Turnaround time
- 1–2 days
Collection points for the selected city
About the test
Total T4 measures the combined amount of free and protein-bound thyroxine, one of the main thyroid hormones. The test helps assess thyroid hormone production and clarify changes in TSH. It is used for investigation and treatment monitoring as directed by a doctor.
TSH, symptoms, medicines and the test method are considered when drawing conclusions. Changes in transport proteins, including during pregnancy, may affect total T4 without a corresponding change in thyroid function.
Why it is ordered
- Assess thyroid hormone production.
- Clarify TSH results and monitor treatment.
How to prepare
Before taking the test, check the preparation and specimen collection requirements with the laboratory. Tell your doctor about medicines and recent treatment. Do not stop prescribed medicines on your own.
Where to have the test
All collection pointsCheck whether the test can be taken at your chosen collection point.
Happy Clinic
Rasul Dent
We will help you prepare for your visit
We will answer questions about services and the testing process.