Hemoglobin (Hb)
- Sample Type
- Standard
- Fasting
- No
- Unit
- g/dL
Hemoglobin is the iron-containing protein in Red Blood Cells (RBCs) responsible for oxygen transport from the lungs to the rest of the body. Within a Complete Blood Picture, Hb is the primary metric used to diagnose anemia. It reflects the blood's oxygen-carrying capacity. Low levels impair cellular metabolism and energy production, while high levels can increase blood viscosity, potentially leading to clotting issues.
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Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
Hb levels are affected by hydration status; dehydration can cause 'hemoconcentration' (falsely high Hb), while overhydration can cause 'hemodilution' (falsely low Hb). Altitude also plays a role, as those living at high altitudes naturally have higher Hb levels.
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 (Hb):
Official Sources
- Hemoglobin test - Mayo ClinicMayo Clinic
- Hemoglobin Test: MedlinePlus Medical TestMedlinePlus
Research & Guidelines
- PubMed: Hemoglobin (Hb) Clinical GuidelinesNCBI / PubMed
Related Indicators
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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