What should I do if I have low mchc?

Find cause of anemia. Mean corpuscular hemoglobin concentration (MCHC) literally means the 'avg. Amount of red blood cell hemoglobin'. Hemoglobin is protein that carries oxygen in blood. Since low MCHC is associated with low iron &anemia, you need to rule out blood loss from excessive periods or 'slow gastro-intestinal (G.I.) bleeding'. G.I. Loss needs to be considered >40 yo. Supplemental iron, folate, (folic acid) B12 may help.