This is a safe and easy procedure, that takes only several minutes to complete
[111] The microbiological assay has been the most commonly used assay technique for foods, utilizing certain vitamin B 12 -requiring microorganisms, such as Lactobacillus delbrueckii subsp
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Hydroxocobalamin has relatively few major drug interactions
For suspected macro-B12, precipitation with PEG is the test most often reached for, though it is nonspecific and can remove B12 that is fully available to cells, so direct measurement of the binding proteins, haptocorrin and transcobalamin, may be more informative when it is available