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And now I have to think about how many of those conditions may be microbial
doi: 10.1146/annurev.psych.48.1.191

West, K

While hyperhomocysteinemia may increase the risk of cognitive impairment and age-related neurodegenerative disease (e.g., Alzheimers disease), it is not clear whether vitamin B 12 deficiency contributes to the risk of dementia in the elderly
Guideline 2: Specialized Dosing for Pernicious Anemia Treating pernicious anemia needs a special vitamin B12 plan