MCH (Mean Corpuscular Hemoglobin)
MCH is the average mass of haemoglobin per red blood cell. It tracks closely with MCV — small cells generally have less haemoglobin (low MCH), large cells more (high MCH). Together with MCV and MCHC, it categorises anaemia.
Normal Range
27–32 pg
Reference ranges may vary slightly between laboratories. Always interpret your result in context with your doctor.
Why is MCH measured?
MCH is automatically calculated on every CBC and is used alongside MCV to classify anaemia.
High MCH means…
High MCH usually accompanies high MCV (macrocytosis) — most often B12 or folate deficiency, alcohol use, or hypothyroidism.
Low MCH means…
Low MCH usually accompanies low MCV (microcytosis) — most often iron deficiency or thalassaemia.
Symptoms associated with abnormal MCH
When MCH is high:
- Symptoms of underlying macrocytic anaemia
When MCH is low:
- Symptoms of underlying microcytic anaemia (iron deficiency)
How to improve your MCH
- MCH adds little beyond MCV — focus on MCV and ferritin/B12 for diagnostic value.
Frequently asked questions about MCH
Is MCH or MCV more useful?
MCV is the primary classifier of anaemia. MCH closely mirrors MCV in most cases. They are typically interpreted together rather than separately.
Medical Sources
This page is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider about your individual results.