Transferrin Blood Test
Transferrin is the primary transport protein for iron in the blood. When iron levels drop, the body compensates by producing more transferrin to maximise iron transport from dietary absorption and storage sites. Conversely, iron overload suppresses transferrin production. Measuring transferrin alongside serum iron, ferritin and transferrin saturation provides the most accurate assessment of your iron status. Regular testing is important for anyone at risk of iron imbalance.
Why Test Transferrin?
Transferrin is an essential component of a complete iron panel and should be tested if you have low dietary iron intake, heavy periods, a history of anaemia or haemochromatosis, or unexplained fatigue, dizziness and pale skin. It is also valuable for monitoring changes in iron status resulting from dietary adjustments, supplementation or medical treatment. Pregnancy and athletic activity further increase the importance of testing.
What Do High Transferrin Levels Mean?
High transferrin is most commonly a sign of iron deficiency. When the body's iron stores are low, the liver produces more transferrin to try to capture and deliver every available iron molecule. This is a compensatory response and should be investigated alongside other iron markers.
What Do Low Transferrin Levels Mean?
Low transferrin may indicate iron overload (haemochromatosis), chronic inflammation, malnutrition, liver disease or kidney disorders. The body reduces transferrin production when there is already excess iron available. Results must be interpreted in the context of a full iron panel.
Symptoms to Watch For
- Fatigue and weakness
- Pale skin
- Dizziness
- Shortness of breath
- Frequent headaches
- Brittle nails and hair
Who Should Get Tested?
- People with low dietary iron intake
- Women with heavy periods or who are pregnant
- Athletes, especially endurance runners
- Those with a personal or family history of anaemia or haemochromatosis
- People experiencing unexplained fatigue, pallor or dizziness
- Anyone already testing ferritin or serum iron who wants a complete picture
How to Prepare for Your Test
Avoid iron supplements for 24 hours before the test. Take the test in the morning before 10 am. Note your menstrual cycle day if applicable. Bring valid ID.
Order Your Blood Test
Test your Transferrin levels with an accredited Swedish laboratory. Results within days, reviewed by Wellth.
Frequently Asked Questions
Why does transferrin rise when iron is low?
Is transferrin the same as TIBC?
Can transferrin be affected by factors other than iron?
Reviewed by
Wellth Team
Wellth
Our content is written and reviewed by Wellth, and fact-checked against peer-reviewed research and current Swedish clinical guidelines.
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The information on this page is provided for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment. Wellth provides health information and testing services but is not a substitute for clinical care. Always consult a qualified healthcare provider if you have questions about a medical condition. If you are experiencing severe or urgent symptoms, contact your doctor or call 1177 Vårdguiden. Blood test results should be interpreted by a qualified healthcare professional in the context of your complete medical history.