Vitamin B12 Deficiency
Vitamin B12 deficiency might occur in some people and it can cause neurological and hematologic symptoms. Vitamin B12 is present in excess amounts in the liver thus decreases the likelihood of its deficiency. However, in certain cases vitamin B12 fails to absorb in the intestine maybe due to some dietary insufficiency, lack of intrinsic factor, or malabsorption. Moreover, other health issues like depletion of hepatic sores and other deficiencies can make you deficient in vitamin B12 levels.
The prevalence of vitamin B12 deficiency varies greatly on the underlying causes in each individual. Some studies show that in the general population approximately 1 to 2% cases of anemia occur due to vitamin B12 deficiency. Other researches indicate that almost 18 to 20% of the people suffering from clinical macrocytosis was due to vitamin B12 deficiency. Regardless of any other underlying cause, vitamin B12 deficiency is more prevalent among elderly people. The incidence of pernicious anemia leading to vitamin B12 deficiency is more common among people of North European descent while less common in African descent people.