Iron deficiency anemia is an important public health problem worldwide. In this case report we presented an unusual case of iron deficiency anemia manifesting with extremely low hemoglobin (Hb) level of 1.7 g/dl. This case was challenging because, the cause of anemia in this patient was insufficient intake, which is an unusual cause of iron deficiency anemia. Secondly, the degree of Hb level that the patient had might not be compatible with life. On the other hand, by means of this case we wanted to present the adaptive capability of human body to chronic long-standing anemia. Therefore, the question of when and how much transfusion will be given should be queried.