Hemoglobin
Also known as: Hgb, Hb
Hemoglobin is the protein in your red blood cells that carries oxygen from your lungs to the rest of your body. It is a core part of the complete blood count (CBC).
Why it's measured
Hemoglobin is checked to look at whether your blood is carrying oxygen as expected and is part of the evaluation for anemia and related conditions. It is read alongside the other CBC values.
Typical range
Reference ranges vary by lab and typically differ between men and women. Factors like hydration and altitude can also influence the result, so your doctor interprets it in context.
What high values can mean
A higher hemoglobin is one value doctors consider together with the rest of the CBC and your circumstances, such as hydration or altitude.
What low values can mean
A lower hemoglobin is commonly discussed in the context of anemia and is read together with related red blood cell values and your history.
Questions to ask your doctor
- What does my hemoglobin suggest within my full blood count?
- Could hydration or other factors have affected it?
- Do any related values need follow-up?
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Try the explainerEducational information only — not medical advice, diagnosis, or treatment. Reference ranges vary by lab; always use your own lab's range and discuss results with a qualified clinician.