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Many health authorities recommend that adults over 50 years take a daily vitamin B12 supplement, usually in the range of 25100 micrograms per day, and/or consume foods fortified with vitamin B12
However, if the research demands medical oversight for administration, injectables might be feasible
We can't stress this enough: unreliable starting materials can derail even the most meticulously planned study
Levy, R
In patients with bulimia or anorexia nervosa, vitamin B 12 deficiency also can be related to diet
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