What is this test?
Ferritin is an iron storage protein and most often serves as a reference for iron stores in the body.
Why might it be ordered?
- For fatigue, anemia, hair loss or other signs of possible iron deficiency.
- To assess iron overload or monitor iron therapy.
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?
Low ferritin usually supports depleted iron stores. Elevated ferritin can be present with inflammation, infection, liver disease, or iron overload. 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.