Transferrin
Transferrin is the main protein in the blood that binds to iron and transports it throughout the body. It reflects the body's capacity to transport iron.
Category: Iron Studies
Also known as: transferrin, serum transferrin, tf, transferin
Reference range: 200–360 mg/dL (Source: ABIM)
Standard unit: mg/dL
High values may indicate
High transferrin levels may indicate iron deficiency, as the body increases transferrin production to capture more available iron.
Low values may indicate
Low transferrin levels may indicate iron overload, chronic inflammation, liver disease, malnutrition, or nephrotic syndrome.
Frequently asked questions
- What is a normal Transferrin level?
- A typical reference range for Transferrin is 200–360 mg/dL (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Transferrin measured in?
- Transferrin is most commonly reported in mg/dL. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Transferrin reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Transferrin over time?
- Yes. Upload results from any lab and BloodId charts your Transferrin over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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