Transferrin is the protein that carries iron in the blood.
- Normal range (adults)
- 200–360 mg/dL (2–3.6 g/L)
- Sample
- Blood
- Fasting
- Not usually needed
- Also called
- Serum Transferrin, TRF, Iron Transport Protein
Transferrin normal range
| Group | mg/dLConventional units: US, South Asia | g/LSI units: UK, Europe, Australia, international |
|---|---|---|
| Adults | 200–360 | 2–3.6 |
Your report may use either unit system; labs in the Gulf often print both. Ranges also vary slightly between laboratories, so the range printed on your own report is the one to go by.
Why is the Transferrin test done?
It is part of iron studies.
What does a high Transferrin level mean?
High transferrin usually means iron deficiency.
Common causes
- Iron deficiency
- Pregnancy
- Estrogen pills
Diet and lifestyle tips
- Iron-rich foods with vitamin C
What does a low Transferrin level mean?
Low transferrin can be due to inflammation, malnutrition or liver disease.
Common causes
- Chronic inflammation
- Malnutrition
- Liver or kidney disease
Diet and lifestyle tips
- Adequate protein and calories
When should you see a doctor?
Interpret with ferritin and serum iron.
Last updated
This page is for general education and is not a diagnosis. Normal ranges differ between laboratories, so always compare your result with the reference range printed on your own report, and discuss abnormal results with your doctor.