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Symptoms of a B12 Deficiency Initially, the symptoms of B12 deficiency can be difficult to notice
if concentration drops below 8mg/mL, the vial's stability window shortens to 14 days instead of 28
Adults get 1000 mcg of vitamin B12 intramuscularly once a week
[3] The same work profiled shifts in the cecal microbiome associated with treatment
Neurological recovery from B12 deficiency typically takes months, though some patients report reduced symptoms within weeks of starting treatment
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