If you are asking yourself, ‘What is iron deficiency anemia?’ you have already answered your own question. It is anemia caused by a lack of iron in one’s diet. In fact, all anemia is an iron deficiency. The cure is to start ingesting more iron. Try cooking with an iron skillet. Dark green, leafy vegetables, as well as meats, are rich in iron. Someone suffering from anemia might also consider a daily iron pill.