Mean Corpuscular Hemoglobin: What Your Results Mean

Name: MCH (Mean Corpuscular Hemoglobin): What It Is and What Your Results Mean
Creator: Ernestas K.

Bottom line: MCH measures the average amount of hemoglobin per red blood cell. Normal is 27-33 pg. Abnormal values help diagnose types of anemia.

What Is Mean Corpuscular Hemoglobin (MCH)?

Mean Corpuscular Hemoglobin (MCH) is a measurement found on a complete blood count (CBC) that tells us the average amount of hemoglobin present in a single red blood cell. Hemoglobin is the protein in red blood cells responsible for carrying oxygen from your lungs to the rest of your body. Think of each red blood cell as a tiny transport vehicle, and MCH is like measuring how much cargo (hemoglobin) each vehicle is carrying on average.

This value, expressed in picograms (pg), is crucial for understanding the health and function of your red blood cells. An abnormally high or low MCH can indicate underlying conditions affecting red blood cell production or their ability to hold hemoglobin. It's often interpreted alongside other red blood cell indices like Mean Corpuscular Volume (MCV) and Mean Corpuscular Hemoglobin Concentration (MCHC) to provide a more comprehensive picture of red blood cell health and diagnose various types of anemia.

Mean Corpuscular Hemoglobin (MCH) Reference Ranges

Classification	Range (pg)
Very Low	< 27
Low	27 - 32
Normal	32 - 36
High	36 - 40
Very High	> 40

What Affects Your Mean Corpuscular Hemoglobin (MCH) Levels?

Iron deficiency anemia
Vitamin B12 deficiency anemia
Folate deficiency anemia
Liver disease
Certain genetic conditions affecting hemoglobin production
Chronic kidney disease
Recent blood loss
Alcoholism

When to Get Tested

Your doctor may order a test to measure Mean Corpuscular Hemoglobin (MCH) as part of a routine complete blood count (CBC). This is often done if you are experiencing symptoms suggestive of anemia, such as fatigue, weakness, pale skin, shortness of breath, or dizziness. It can also be ordered if you have a known chronic condition that can affect red blood cell production or if you are undergoing treatment for certain types of anemia.

Look Up Your Mean Corpuscular Hemoglobin (MCH) Result

Select your value below to see a detailed breakdown of what it means:

Read the Full Blood Test Guide

Frequently Asked Questions

What does a low MCH result mean?

A low MCH indicates that, on average, your red blood cells are carrying less hemoglobin than normal. This is often seen in microcytic anemias, where red blood cells are smaller than average, most commonly due to iron deficiency.

What does a high MCH result indicate?

A high MCH suggests that your red blood cells are carrying more hemoglobin than normal. This is typically associated with macrocytic anemias, where red blood cells are larger than average, often caused by deficiencies in vitamin B12 or folate.

How is MCH different from MCV?

MCH measures the average weight of hemoglobin within a single red blood cell, while MCV measures the average size of a red blood cell. Both are important for diagnosing different types of anemia, but they provide distinct information about red blood cell characteristics.

Ernestas K.

Clinical Research Writer