Transferrin Saturation
Transferrin saturation measures the percentage of transferrin that is carrying iron. It helps assess whether too much or too little iron is being transported in the blood.
Category: Iron Studies
Also known as: transferrin saturation, tsat, iron saturation, transferrin sat, % saturation, FE/TIBC, Iron Satn, Iron/Iron binding capacity.total
Reference range: 20–50 % (Source: ABIM)
Standard unit: %
High values may indicate
High transferrin saturation may indicate hemochromatosis (iron overload), iron poisoning, or hemolytic anemia.
Low values may indicate
Low transferrin saturation may indicate iron deficiency anemia, chronic disease, or inadequate dietary iron intake.
Frequently asked questions
- What is a normal Transferrin Saturation level?
- A typical reference range for Transferrin Saturation is 20–50 % (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 Saturation measured in?
- Transferrin Saturation is most commonly reported in %. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Transferrin Saturation 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 Saturation over time?
- Yes. Upload results from any lab and BloodId charts your Transferrin Saturation 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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