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At very low doses, smaller vials (if available) or pre-mixed formulations may be more cost-effective
Yet, there is no gold standard blood test, and the manifestation of clinical symptoms is important in the diagnosis of vitamin B 12 deficiency (13)
Along with vitamin B9, or folate, B12 helps create red blood cells, aids in the function of iron in the body, and produces a compound that supports the mood and immune system
There is no proven human timeline
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