An MCH value calculated below 27.5 pg is considered low MCH. This means that there's a low amount of hemoglobin present per red blood cell.

What MCH level is too low?

MCH levels below 26 pg are considered abnormally low. Common causes of Low MCH include blood loss, iron deficiency and microcytic anemia, which is a condition in which red blood cells are abnormally small, carrying less hemoglobin.

What is considered a low MCHC level?

The reference range for MCHC in adults is 33.4–35.5 grams per deciliter (g/dL). If your MCHC value is below 33.4 grams per deciliter, you have low MCHC. Low MCHC values occur if you have anemia due to iron deficiency.