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Maintenance, non-dietary cause: 1mg every two to three months for life
In extreme cases, people with pernicious anemia or a related condition known as vitamin B12 deficiency myelopathy can develop nerve damage related to vitamin B12 deficiency
In people aged 50 and over, adequate consumption of vitamin B12 is thought to be important for maintaining good vision and protecting against macular degeneration
National Institute for Health and Care Excellence (2018) Diagnosis of anaemia- B12 and folate deficiency (CKS)
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