Hb
The protein in red blood cells that carries oxygen.
What is it
Hemoglobin is the protein that binds and transports oxygen in red blood cells. Hemoglobin level is the primary measure of anemia.
Why it's measured
Hemoglobin has been the foundational marker for anemia evaluation in research and clinical practice.
Reference range
Standard laboratory reference
Men: 13.5 – 17.5 / Women: 12.0 – 15.5 g/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 polycythemia and certain conditions in research literature.
Lower
Has been associated with anemia in published research.
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 standard CBC.
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.