What could cause hemoglobin to be low when there is no bleeding interanlly?
Women tend to have lower hemoglobin levels. In the absence of bleeding, iron deficiency anemia is the most common cause, especially in women with heavy menstrual flow. Other causes are: certain vitamin deficiencies (folic acid, B12), occult gastrointestinal bleeding, destruction of red blood cells caused by certain dieseases like autoimmune diseases, bone marrow failure due to malignancies, renal disease and hereditary diseases like sickle cell disease or Thallasemias…
