Biomarker education
Transferrin saturation: What It Measures & Why People Track It
Also called: Iron saturation, TSAT
Transferrin saturation is a calculated percentage showing how much of the iron-carrying capacity is in use.
General biomarker education — not personalized medical advice. Learn more
Result on your report
IllustrativeTransferrin saturation
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Range: Low – High
LowReference intervalHigh
What it generally measures
This value is typically calculated from serum iron divided by TIBC.
Common units on reports: %
Why people track it over time
Transferrin saturation is reviewed as part of the full iron-studies group (iron, ferritin, TIBC) rather than alone.
Changes over time do not by themselves establish a diagnosis. Learn more
Questions you might ask a healthcare professional
Questions to bring
IllustrativeAsk how this percentage was calculated from your iron and TIBC results.
Ask how it fits with ferritin on the same report.
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