Hemoglobin
- Sample Type
- Standard
- Fasting
- No
- Unit
- g/dL
Hemoglobin (Hb) is the iron-containing protein in red blood cells (RBCs) responsible for transporting oxygen from the lungs to the tissues. In a complete blood count (CBC) panel, it is the primary indicator of anemia or polycythemia. Measurement is vital for diagnosing fatigue, screening for nutritional deficiencies (iron, B12, folate), monitoring chronic kidney disease, and evaluating blood loss after surgery or trauma.
Check Your Result
Check Your Result
Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
Hemoglobin levels can be artificially elevated by dehydration or smoking. Conversely, they may appear lower due to fluid overload (hemodilution). Genetic variants like Thalassemia or Sickle Cell Trait can also lead to 'normal' but non-functional hemoglobin levels that require specialized testing.
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:
Official Sources
- Hemoglobin test - Mayo ClinicMayo Clinic
- Hemoglobin Test: MedlinePlus Medical TestMedlinePlus
Research & Guidelines
- PubMed: Hemoglobin 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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