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Where results are borderline, measurement of methylmalonic acid (MMA) or holotranscobalamin (active B12) may help clarify the picture, as recommended in NICE CKS guidance on B12 and folate deficiency anaemia
It was originally derived from a protective protein found in the human stomach
Florida's pharmacy board maintains rigorous oversight of compounding operations
However, this doesnt mean it should be used without medical guidance
doi:10.1371/journal.pone.0034906
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