Mean corpuscular hemoglobin (MCH)
Blood cell systemMean Corpuscular Hemoglobin measures the average amount of hemoglobin per red blood cell.
It helps evaluate the hemoglobin content of cells and is used alongside other RBC indices to classify anemias.
Reference range
Source: lab benchmark
Reference ranges may vary between labs and assays. Always interpret results with your healthcare provider. · LOINC code: 28539-5
Why this matters
MCH levels can reveal early changes in red blood cell health before obvious symptoms like fatigue or weakness appear. Low MCH often points to iron deficiency or anemia, while high MCH may indicate vitamin B12 or folate deficiency or certain liver conditions. Maintaining a balanced diet with adequate iron, B12, and folate, along with regular checkups, helps support healthy red blood cells and oxygen delivery throughout the body.
How this connects to other biomarkers
- Low MCH (each red cell carries less hemoglobin, "hypochromic") parallels low MCV in iron-deficiency anemia and thalassemia trait.
- High MCH typically accompanies high MCV in macrocytic states (Vitamin B12 / Folic acid (Vitamin B9) deficiency, alcohol, underactive thyroid).
- Isolated MCH abnormalities are rare without corresponding MCV or MCHC changes.
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