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Causes of iron deficiency anemia include: 1  Blood loss. Blood contains iron within red blood cells. 2  A lack of iron in your diet. Your body regularly gets iron from the foods you eat. 3  An inability to absorb iron. Iron from food is absorbed into your bloodstream in your small intestine.  Pregnancy.
Iron-deficiency anemia, also spelled iron-deficiency anaemia, is defined as a decrease in the amount of red blood cells (RBCs) or hemoglobin in the blood due to not enough iron.f the cause is dietary iron deficiency, eating more iron-rich foods, such as beans, lentils or red meat, or taking iron supplements, usually with iron(II) sulfate, ferrous gluconate, or iron amino acid chelate ferrous bisglycinate, or synthetic chelate NaFerredetate EDTA, will usually correct the anemia.