Iron deficiency is a reduced content of total body iron. Iron deficiency anaemia (IDA) occurs when the iron deficiency is sufficient to reduce erythropoiesis and therefore the haemoglobin (Hb) level falls. However, problems related to iron depletion can develop before this stage. Globally, iron deficiency is the most common cause for anaemia.1
This is a companion discussion topic for the original article at https://patient.info/doctor/haematology/non-anaemic-iron-deficiency