Biomarker education
TIBC: What It Measures & Why People Track It
Also called: Total iron-binding capacity
TIBC estimates the blood's capacity to carry iron, using transferrin as the main carrier.
General biomarker education — not personalized medical advice. Learn more
Result on your report
IllustrativeTIBC
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Range: Low – High
LowReference intervalHigh
What it generally measures
This test reflects how much iron the blood could carry if transferrin were fully saturated.
Common units on reports: µg/dL
Why people track it over time
TIBC is generally interpreted together with iron and ferritin as part of a full iron-studies panel.
Changes over time do not by themselves establish a diagnosis. Learn more
Questions you might ask a healthcare professional
Questions to bring
IllustrativeAsk how TIBC fits with iron and ferritin on this report.
Ask whether transferrin saturation was calculated from these values.
Related markers
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