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Transferrin Saturation

TSAT Iron Saturation Percentage Transferrin Saturation
Calculated from serum iron and TIBC %

About this test

Calculated as (Serum Iron / TIBC) × 100. Reflects the proportion of transferrin carrying iron. Key parameter for both iron deficiency (<20%) and iron overload (>45%).

Reference Ranges

Sex Age Range Notes
All ≥ 18 yrs 20 – 50 Adult; <20% = iron-restricted; >45% = iron overload concern

Clinical Interpretation

Low / Decreased
Low (<20%) — iron deficiency, anaemia of chronic disease.
High / Increased
High (>45–50%) — haemochromatosis, iron excess, liver disease, haemolytic anaemia. >60–70% — overt iron overload.

Related Tests

Serum Iron Ferritin
Specimen
Calculated from serum iron and TIBC
Reporting Unit
%
Category
⚙️ Iron Studies

⚠ Clinical Note
Reference ranges are indicative. Always interpret results in the context of the individual patient and local laboratory reference intervals, which may vary.