Women also lose blood during childbirth. In addition, women often do not eat as much meat as men. So women tend to have low amounts of iron.
Vitamin deficiency anemia occurs when you have low amounts of vitamin B12 and folate. Your body needs iron to produce hemoglobin, and vitamin B12 to make red blood cells work properly. Without either of these two key ingredients, your body can’t produce good enough red blood cells. People with autoimmune disorder are most prone to this type of anemia, simply because they do not absorb vitamin B12 from food as the rest of us do.