Iron deficiency anaemia (IDA) is often multifactorial. In pre menopausal women the most common cause of IDA is menstrual blood loss while in adult men and postmenopausal women, blood loss from the GI tract is the most common cause (1).
Occult GI blood loss
Malabsorption
Non-GI blood loss
In the tropics the high prevalence of iron deficiency is related to poor diet and to blood loss from hookworm infestation.
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