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where does the vitamin b12 injection go Injections Treating Severe Vitamin B12 Deficiency
Description
They concluded that B12 accumulation in the placenta may represent an important factor in providing sufficient amount of this essential nutrient to the fetus (Giugliani, 1985). Due to a lack of clinical trials and case reports examining non-daily doses of B12 in pregnant or breastfeeding women, perhaps non-daily injections can provide some insight

doi: 10.1038/nature07319 61 SprangerMKrempienSSchwabSMaiwaldMBrunoKHackeW

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Oral administration: 0.5-1 mg daily to compensate for lower bioavailability compared to injection