Transferrin saturation (TfS)
The test provides a comprehensive view of iron metabolism. It is performed to determine transferrin saturation with iron (TSAT), a percentage indicator that represents the ratio of iron concentration to transferrin concentration or the ratio of iron to total iron-binding capacity.

ClinicLab
- Test description
Transferrin Saturation with Iron Test - Assessment of Iron Metabolism
The test is performed to determine transferrin saturation with iron (TSAT). This indicator, expressed as a percentage, represents the ratio of iron concentration to transferrin concentration or the ratio of iron to total iron-binding capacity (TIBC). The test provides a comprehensive view of iron metabolism.
When to Perform the Test?
The test is conducted to assess transferrin saturation with iron (TfS) in patients. This test has greater diagnostic value than separate measurements of transferrin or iron concentrations.