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MCH: What Hemoglobin Per Red Blood Cell Shows
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What is it?
MCH stands for mean corpuscular hemoglobin. It reflects the average amount of hemoglobin per red blood cell and is reported in picograms (pg) as part of a complete blood count.
Because it is calculated from hemoglobin and red blood cell count, the MCH provides information about how much oxygen carrying protein each red blood cell contains.
Why it matters
MCH helps describe how much hemoglobin each red blood cell contains. This adds context to anemia patterns and helps distinguish whether red blood cells are carrying a typical amount of oxygen carrying protein.
MCH is interpreted alongside hemoglobin, MCV, MCHC, and RDW to guide further testing. It does not diagnose a condition on its own.
Reference ranges
- Below range: Each red blood cell is carrying less hemoglobin than usual. This is most often seen when iron levels are low or when red blood cells are smaller than normal.
- In range: Each red blood cell is carrying a typical amount of hemoglobin. If other blood markers are normal, this is usually reassuring.
- Above range: Each red blood cell is carrying more hemoglobin than usual, which often happens when red blood cells are larger than normal. This can be seen with vitamin B12 or folate deficiency, alcohol use, liver conditions, or during recovery from anemia.
Kundrapu, S., & Noguez, J. (2018). Laboratory assessment of anemia. Advances in Clinical Chemistry, 83, 197–225.
Li, D., Wang, A., Li, Y., Ruan, Z., Zhao, H., Li, J., Zhang, Q., & Wu, B. (2024). Nonlinear relationship of red blood cell indices (MCH, MCHC, and MCV) with all-cause and cardiovascular mortality: A cohort study in U.S. adults. PloS One, 19(8), e0307609.
Sarma, P. R. (1990). Red cell indices. In Clinical Methods: The History, Physical, and Laboratory Examinations. Butterworths.
This information is educational and does not replace medical advice, diagnosis, or treatment. Your results should be interpreted with a qualified healthcare professional in the context of your health history.
