Is my MCH (Mean Corpuscular Hemoglobin) normal?
Free blood test checker · Standard + longevity-optimal ranges
What is a normal MCH level?
MCH measures the average amount of hemoglobin per red blood cell in picograms. Normal range is 27-33 pg. MCH closely parallels MCV — low MCH (hypochromic) typically indicates iron deficiency, while high MCH indicates B12/folate deficiency. MCH is calculated as hemoglobin divided by RBC count.
| Range | Values |
|---|---|
| Standard Reference | 27–33 pg |
| High Risk | > 36 pg |
| Low Risk | < 24 pg |
What causes abnormal MCH levels?
Low MCH: iron deficiency anemia, thalassemia trait, chronic disease anemia, sideroblastic anemia. High MCH: vitamin B12 deficiency, folate deficiency, alcoholism, liver disease, hypothyroidism, myelodysplastic syndromes. MCH and MCV abnormalities tend to occur together and share the same differential diagnosis.
When should you see a doctor?
See your doctor if MCH is below 24 pg or above 36 pg. These values parallel MCV abnormalities and warrant the same workup: iron studies for low MCH, B12/folate levels for high MCH. MCH abnormalities rarely occur in isolation — they are typically part of a broader CBC pattern.
MCH and longevity
MCH provides complementary information to MCV in characterizing red blood cell health. While MCV and MCH typically move together, discordance between the two can occasionally provide diagnostic clues. Maintaining optimal MCH through adequate iron, B12, and folate ensures each red blood cell carries its full oxygen-carrying capacity — essential for exercise performance and cognitive function in aging.
Where to get a MCH test
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Related biomarkers
These biomarkers are often tested alongside MCH for a more complete picture.
Frequently asked questions
What is a normal MCH level?
How is MCH different from MCHC?
What causes low MCH?
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Sources: Reference ranges based on AHA/ACC, ADA, and AACE clinical guidelines. Biological variation data from Ricos/Westgard database. Longevity-optimal ranges reflect targets used by preventive and functional medicine practitioners.
Last reviewed: April 2026. This tool provides general health information and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider about your specific results.