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B12 in Your Body Your body cant make B12
Elderly patients tend to have a greater frequency of decreased hepatic, renal, or cardiac function, and also have concomitant disease or receiving other drug therapy
Its an essential nutrient, which means your body cant make vitamin B12, and it must come from outside sources
Efficacy of different routes of vitamin B12 supplementation for the treatment of patients with vitamin B12 deficiency: A systematic review and network meta-analysis
PMID: 34377956
Oral dosing is most common in research
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