Mean Corpuscular Hemoglobin Concentration (MCHC)
MCHC measures how densely packed hemoglobin is within your red blood cells. Unlike MCH (total hemoglobin per cell), MCHC adjusts for cell size. It is particularly useful for identifying iron deficiency (low MCHC, pale cells) and hereditary spherocytosis (high MCHC, dense spherical cells).
Reference Ranges
Male
32 – 36
g/dL
Female
32 – 36
g/dL
Child
32 – 36
g/dL
Ages 6–12
Reference ranges may vary by laboratory. Always compare with the range printed on your lab report.
What Low Levels Mean
Low MCHC (hypochromic cells) means red cells look pale under a microscope because they have less hemoglobin concentration. Iron deficiency is the most common cause. Thalassemia and chronic disease anemia can also lower MCHC.
What High Levels Mean
High MCHC is less common and may indicate hereditary spherocytosis (genetic condition where cells are round and dense), severe dehydration, or laboratory error. Values above 36 g/dL should be rechecked.
Frequently Asked Questions
What does hypochromic mean?
Hypochromic means 'less color.' Under a microscope, hypochromic red blood cells appear paler than normal because they contain less hemoglobin. It corresponds to a low MCHC and is a hallmark of iron deficiency anemia.
Can MCHC help distinguish iron deficiency from thalassemia?
Both conditions can lower MCHC, but iron deficiency typically shows low ferritin and high TIBC, while thalassemia trait shows normal iron studies and elevated HbA2. MCHC alone cannot distinguish them — additional tests are needed.
Is MCHC affected by hydration?
Yes, mildly. Dehydration can slightly concentrate cells and raise MCHC. Overhydration can dilute them. For accurate results, stay normally hydrated before your blood test.
This information is for educational purposes only and should not replace professional medical advice. Always consult your doctor for interpretation of your test results.
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