Mean Corpuscular Haemoglobin (MCH) is the average amount of hemoglobin in a person’s red cells. Normal MCH levels are around 27 to 33 picograms (pg) per cell in adults.

Causes of high MCH:

Macrocytic anaemia –such as

• Megaloblstic anaemia
• Non-megaloblastic anaemia
• Liver disease
• Haemolytic anaemia
• Alcoholism
• Myelodysplastic syndrome
• hypothyroidism

Causes of low MCH:

Microcytic hypochromic anaemia –such as

• Iron deficiency anaemia.
• Thalassaemias
• Sideroblastic anaemia
• Anaemia of chronic disease