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Out of more than 900 fillings, this never happened again
Since multiple species of Propionibacterium produce no exotoxins or endotoxins and have been granted GRAS status (generally regarded as safe) by the United States Food and Drug Administration, they are the preferred bacterial fermentation organisms for vitamin B 12 production
Hydroxocobalamin is another naturally occurring form commonly used in medical settings
Avoid repeated freeze-thaw cycles, as this can degrade the peptides
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