<unk> , also known as vitamin B9 deficiency, is a low level of folate and derivatives in the body. Signs of<unk>  are often subtle. A low number of red blood cells (anemia) is a late finding in<unk>  and<unk>  anemia is the term given for this medical condition. It is characterized by the appearance of large-sized, abnormal red blood cells (megaloblasts), which form when there are inadequate stores of folic acid within the body.
Folate deficiency
Vitamin E deficiency
Properdin deficiency
Zinc deficiency
Hereditary folate malabsorption
Iron deficiency
Familial isolated vitamin E deficiency
Cerebral folate deficiency