<unk>  is estimated to affect 0.1% of the general population and 1.9% of those over 60, accounting for 20–50% of B12 deficiency in adults. A review of literature shows that the prevalence of<unk>  is higher in Northern Europe, especially in Scandinavian countries, and among people of African descent, and that increased awareness of the disease and better diagnostic tools might play a role in apparently higher rates of incidence.
Pernicious anemia
Zinc deficiency
Iron poisoning
Zinc toxicity
Hookworm infection
Fruit allergy
Pinworm infection
African iron overload