Hematology

Hemoglobin (Hgb)

Normal Range
Male: 13.5-17.5 g/dL; Female: 12.0-15.5 g/dL
Sample Type
Standard
Fasting
No
Unit
g/dL

Hemoglobin is the iron-containing protein in red blood cells responsible for transporting oxygen from the lungs to the tissues. It is the primary indicator of anemia or polycythemia within a Complete Blood Count (CBC). Measuring Hgb levels is essential for evaluating the blood's oxygen-carrying capacity and monitoring response to blood loss or nutritional deficiencies.

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Interactive
g/dL

Enter your lab result to see where you stand compared to the standard reference range.

Why Context Matters

Hgb levels are highly sensitive to plasma volume; dehydration can cause a 'false' elevation (hemoconcentration), while fluid overload or pregnancy can cause a 'false' decrease (hemodilution). Chronic smoking and living at high altitudes also naturally elevate Hgb.

Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.

Clinical References

Source-of-truth databases and clinical guidelines for Hemoglobin (Hgb):

Research & Guidelines

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DR

Medically Reviewed by Dr. Binoy Babu, MBBS

Board Certified Doctor • 10+ Years Clinical Experience

Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.

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