Vitamin deficiencies as cause of Anemia

Iron, folic acid, vitamin B12, or other vitamin deficiencies;

While a lack of iron in the diet is self explanatory and is an obvious reason for anemia, there are other less obvious nutritional deficiencies that also contribute to anemia. One of these is vitamin B 12 deficiency. Absorption of B 12 from the diet in the small intestine requires an enzyme secreted from the stomach known as intrinsic factor. When this factor is low, absorption of vitamin B 12 from diet is severely restricted resulting in a severe impairment to the body's ability to manufacture blood. In addition, the body's normal timetable for recycling of blood cells is accelerated with the end result of increased and premature blood cell destruction. Along with this also comes damage to the nervous system. This condition is called pernicious anemia.
Other deficiencies include folic acid and B1 and rarely deficiencies such as copper, vitamin A, B2, B6, E, C can also play a role in anemia.