Mean Corpuscular Haemoglobin (MCH) Blood Health

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What is it?

Mean corpuscular (or cell) hemoglobin (abbreviated as MCH) is an estimate of the amount of hemoglobin in an average red blood cell. Hemoglobin is a substance in the blood that carries oxygen to the cells in the body from the lungs.

High hemoglobin content is often referred to as hyperchromia, and low content, hypochromia.

When anemia is present, calculating a person’s MCH can help to determine the type of anemia, as well as its level of severity.


Optimal range

26.6 - 33 pg

What are low values associated with?

Low MCH is associated with microcytic anemia, which is characterized by smaller-than-normal RBCs, and normocytic anemia, when red blood cells are normal in size but do not contain sufficient hemoglobin. When low MCH is a feature of anemia, the condition is said to be hypochromic. Causes of low MCH include:

- Acute or chronic bleeding due to menstruation, physical trauma, surgery, or ulcers, among other types of blood loss

- Deficiency in copper, vitamin B6 (pyridoxine) or vitamin C

- Gastrointestinal cancer

- Hemolytic anemia

- Iron-deficiency anemia

- Lead poisoning

- Kidney disorders

- Removal of the spleen (splenectomy)

- Rheumatoid arthritis

- Sickle cell anemia

- Thalassemia

What are high values associated with?

High values usually indicate the presence of macrocytic anemia— anemia characterized by red blood cells that are larger than normal in size. Hereditary and hemolytic anemias, as well as megaloblastic anemia, are often macrocytic.

The common causes of high MCH include:

- Alcoholism

- Certain medications, such as anticonvulsant drugs, diabetic medications, and oral contraceptives

- Hemolytic anemia

- Hereditary anemia

- Hypothyroidism

- Intestinal malabsorption of nutrients due to surgery or an underlying medical condition

- Liver disease

- Megaloblastic anemia

Biomarker category

Blood Health

Other biomarkers in this category

Ammonia, C-Reactive Protein (CRP), Ferritin, Fibrinogen Activity, HAEMOGLOBIN (g/L), Haemoglobin A1c, HAEMOGLOBINe, Hematocrit (HCT) / Packed Cell Volume (PCV), Hemoglobin, Iron, IRON (Serum), Lactate Dehydrogenase (LDH), Large Unstained Cells (LUC), Large Unstained Cells (Percent), Magnesium, Magnesium, RBC, Mean Cell Volume, Mean Corpuscular Haemoglobin (MCH), Mean Corpuscular Haemoglobin Concentration (MCHC), Mean Corpuscular Volume (MCV), Mean Platelet Volume (MPV), Platelet count, Plateletcrit (PCT), RDW-CV (Red Cell Distribution Width), RDW-SD (Red Cell Distribution Width), Red Blood Cells (Erythrocytes / RBC), Special Stains, Thrombocytes, TIBC, Transferrin saturation, UIBC

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