TIBC Test
The total capacity of your blood proteins to carry iron. Rises when iron is scarce.
What is TIBC?
The total capacity of your blood proteins to carry iron. Rises when iron is scarce.
TIBC Reference Range
These are the typical adult reference ranges used by major US labs. Your report will include the specific range used by the lab that processed your sample.
| Population | Range |
|---|---|
| age 18+ | 250 – 450 mcg/dL |
Reference ranges are educational. Always interpret your result with the specific range printed on your lab report and discuss anything outside the range with a clinician.
What your TIBC result may mean
Often reflects iron deficiency.
Educational only — not a diagnosis. Many factors can influence a single result. Discuss anything that concerns you with a healthcare provider.
Sources
Related Iron & Anemia biomarkers
Markers commonly tested alongside TIBC.
Frequently asked
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