🩸 Transferrin Saturation (TSAT)
Assess iron status from serum iron and TIBC with transferrin saturation (TSAT).
Transferrin Saturation (TSAT)
Serum iron (µg/dL)
TIBC (µg/dL)
When to use
Evaluate iron deficiency and overload, including in CKD.
How it works
TSAT = serum iron / TIBC × 100. < 20% suggests deficiency; > 45% suggests overload.
Key points
- Interpret alongside ferritin.
- In CKD, TSAT ≤ 20% with appropriate ferritin suggests iron deficiency.
- High TSAT may indicate haemochromatosis.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.