Reviewed: 16. April 2026
Hb Hemoglobin
Unit: g/dl
Quick Explanation
Hemoglobin (Hb) is the protein in red blood cells that carries oxygen from the lungs to organs and tissues. Normal values are 12–16 g/dl for women and 13.5–17.5 g/dl for men. A low level indicates anemia and can cause fatigue. Discuss abnormal results with your doctor.
📊 Reference Values
ℹ️ Reference ranges may vary slightly between laboratories. Always compare your value with the reference range from your own lab report.
🔍 Possible Causes
Value too high — possible causes
- ·Dehydration
- ·Smoking
- ·High altitude
- ·Polycythemia vera
Value too low — possible causes
- ·Iron deficiency
- ·Vitamin B12 deficiency
- ·Chronic disease
- ·Blood loss
- ·Folate deficiency
This list shows possible causes — not a diagnosis. Only your doctor can correctly interpret your result.
🩺 Questions for Your Doctor
- →What type of anemia might I have?
- →Do I need iron supplements or other nutritional supplements?
- →When should this value be rechecked?
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Medical Disclaimer
The content on this page is for general information only and does not replace professional medical advice, diagnosis, or treatment. Always consult your doctor or pharmacist for health-related questions. Lab values should always be assessed in the context of your personal medical history.