Hemoglobin (Hgb)
The protein in red blood cells that carries oxygen from your lungs to the rest of your body. It is the most important indicator of anemia.
Typical normal range
Men: 13.5–17.5 · Women: 12–15.5 g/dL
If high ↑
Polycythemia, dehydration, smoking, high altitude
If low ↓
Anemia (iron deficiency, B12/folate deficiency, chronic disease, blood loss)
What is a normal Hemoglobin level?
A typical reference range is Men: 13.5–17.5 · Women: 12–15.5 g/dL. Ranges vary between laboratories and can depend on age and sex, so compare your result with the range printed on your own report.
What does a high Hemoglobin level mean?
Polycythemia, dehydration, smoking, high altitude. A single result rarely gives a diagnosis on its own; your doctor will interpret it alongside your symptoms and other tests.
What does a low Hemoglobin level mean?
Anemia (iron deficiency, B12/folate deficiency, chronic disease, blood loss). Your doctor will interpret it alongside your symptoms and other tests.
About the Complete Blood Count (CBC)
A complete blood count looks at the cells in your blood: red cells that carry oxygen, white cells that fight infection, and platelets that help blood clot. It is one of the most commonly ordered tests and is often part of a routine check-up.
See your own Hemoglobin result explained
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Analyze my results freeRelated markers in the Complete Blood Count (CBC)
Medical disclaimer: Reference ranges vary by laboratory, age, sex, and clinical context. This page is for educational purposes only and is not a diagnosis. Always discuss your results with a qualified healthcare professional.