Pernicious anemia is more common in people of Northern European and African descent than in other ethnic groups.
Older people also are at higher risk for the condition. This is mainly due to a lack of stomach acid and intrinsic factor, which prevents the small intestine from absorbing vitamin B12. As people grow older, they tend to make less stomach acid.
Pernicious anemia also can occur in younger people and other populations. You're at higher risk for pernicious anemia if you:
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