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Anaphylactic reaction after injection of vitamin B12 Heres a case of two female patients with pernicious anemia who had adverse reactions to B12 shots (hydroxocobalamin)
While glutathione is naturally present in the body and plays important roles in fetal development, intentional supplementation with injectable forms during pregnancy should only be undertaken under close obstetric supervision if potential benefits clearly outweigh theoretical risks
10.1001/jama.296.1.87
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"Oral vitamin B12 versus intramuscular vitamin B12 for vitamin B12 deficiency: a systematic review of randomized controlled trials"
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