MCH

Understanding the marker

MCH is the average amount of haemoglobin in each red blood cell. Read with cell size and total haemoglobin, it adds detail to the blood-count pattern.

MCH is interpreted as part of the blood count, especially alongside MCV and Hb. Changes can help describe a pattern but do not establish the cause of anaemia or a specific nutrient deficiency.

What does high MCH mean?

High MCH means more haemoglobin per red cell on average, often alongside larger cells. MCV, total haemoglobin and relevant follow-up tests help explain the pattern.

What does low MCH mean?

Low MCH means each red cell carries less haemoglobin on average. Cell size, total haemoglobin and iron tests help determine the significance; MCH alone does not identify a deficiency.