MCV (Mean Corpuscular Volume)
MCV shows the average size of red blood cells. It helps classify anemia: low in iron deficiency, high in B12 or folate deficiency.
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Normal ranges
Adults: 80–100 fL.
Units: fL
Causes of deviations
Low levels:
Iron deficiency anemia, thalassemia, chronic disease.
High levels:
Vitamin B12 or folate deficiency, alcohol, hypothyroidism.
When to see a doctor
If outside the reference range — usually evaluated with hemoglobin and ferritin.
Related biomarkers
Panels
Cbc
Conditions
Anemia
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