TIBC
The total capacity of transferrin to carry iron.
What is it
TIBC measures the total amount of iron that can be bound by transferrin in circulation. It is used alongside iron and ferritin in iron studies.
Why it's measured
TIBC has been used in evaluating iron deficiency and overload in research and clinical practice.
Reference range
Standard laboratory reference
240 – 450 μg/dL
Reference ranges vary by laboratory. Your individual reference range will appear on your test report and should be interpreted by your physician in the context of your overall health profile.
What results may indicate
Elevated
Has been associated with iron deficiency in research literature.
Lower
Has been associated with chronic inflammation or iron overload in research literature.
These associations are general. They are not a personal diagnosis or prediction. Discuss your individual results with your physician in the context of your full health profile.
When it's measured
Part of iron studies.
Related markers
Measured in
A complete look at your heart, hormones, metabolism, inflammation, and longevity systems — drawn at Quest or LabCorp, reviewed by a U.S.-licensed physician.
Explore the Apex Panel →This information is for general educational purposes only and is not medical advice. Lab results alone are not intended to diagnose, treat, or cure any condition and do not replace the advice of a healthcare provider. OPTML does not offer medical advice, a diagnosis, medical treatment, or any form of medical opinion.