anemia definition

Anemia is the condition in which one possesses less than normal hemoglobin or red blood cells in the blood.  This causes a reduction of oxygen circulating in the body and can cause a number of symptoms, especially fatigue and lethargy.  Anemia may be a result of insufficient B12, folate, and iron in the body.  It can also be caused by menstrual bleeding, a bone marrow disease, a break in red blood cells, and the abnormal formation of red blood cells.