What is this test?
Transferrin is a protein from the liver that carries iron into the blood.
Why might it be ordered?
- To clarify iron deficiency or overload.
- As part of an evaluation of anemia, nutritional status, liver disease, or inflammation.
What sample is needed?
A healthcare professional collects a venous blood sample. Depending on the method, the laboratory uses serum or plasma.
How should you prepare?
Tell the laboratory about all medicines, hormone treatments, vitamins and supplements you take. Do not stop or change treatment unless your clinician tells you to. Follow any instructions about fasting and the time of collection.
How should you understand the result?
Transferrin is usually interpreted with iron, ferritin, and transferrin saturation. Inflammation and liver disease can alter the value independently of iron stores. Your result is interpreted using the reference interval on the laboratory report and in the context of your symptoms, medical history and other test findings.
Sources and editorial status
This patient-facing text is an editorial draft. It should be approved by a laboratory physician before official publication.