Biomarker education

Hemoglobin: What It Measures & Why People Track It

Also called: Hgb, Hb

Hemoglobin is the protein in red blood cells that carries oxygen, measured on a CBC.

General biomarker education — not personalized medical advice. Learn more

Result on your report

Illustrative

Hemoglobin

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Range: Low – High

LowReference intervalHigh

What it generally measures

Labs report the concentration of hemoglobin in your blood sample as part of the complete blood count.

Common units on reports: g/dL

Why people track it over time

Hemoglobin is often tracked alongside hematocrit and RBC count over time, particularly when discussing energy levels or blood-related questions with a clinician.

Changes over time do not by themselves establish a diagnosis. Learn more

Questions you might ask a healthcare professional

Questions to bring

Illustrative

Ask how hemoglobin compares with hematocrit and RBC on this report.

Ask whether iron-related markers (ferritin, iron, TIBC) are relevant to review together.

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Reference range

Hemoglobin reference range

What the range on your report means for this marker.

Panel guide

Related panel guide

Understand the broader panel this marker appears on.

Related biomarker

Hematocrit

Hematocrit is the percentage of blood volume made up of red blood cells, part of a CBC.

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