MCH is calculated by dividing the amount of Hb in a given blood volume by the number of RBCs present,” says Dr Mahajan. Anemia or iron deficiency is the biggest cause of low MCH levels.

Beta-Thalassemia Trait (BTT): A condition where an individual carries one copy of the mutated gene for beta-thalassemia, often resulting in mild anemia. Mean Corpuscular Hemoglobin (MCH): A ...