Transferrin Saturation (TSAT)
Transferrin saturation indicates the percentage of transferrin iron-binding sites currently filled with iron.
Test your personal value
Enter the number from your lab report to instantly see how it compares to reference ranges.
Physiological Reference Ranges
The ranges below represent standard adult physiological values. Your laboratory's printed reference range always takes precedence.
15 – 50 %
15 – 45 %
20 – 50 %
What does a low result mean?
Saturation below 15-20% reflects reduced functional iron availability, suggesting the body would benefit from replenishment.
What does a high result mean?
A slightly high percentage can happen following same-day iron supplements or a particularly iron-rich meal.
Questions ready for your doctor
Bring these questions to your next consultation to discuss with your healthcare practitioner:
- Does this confirm reduced circulating iron availability?
- What is the most effective approach to replenish iron levels?
- Should we plan a follow-up panel in 3 months?
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Important information — Medical notice
ScanMyLab is for informational purposes only. It does not provide a diagnosis and never replaces the advice of your doctor or laboratory.