By carefully considering these factors and selecting the appropriate needle size for B12 injections, healthcare providers can promote effective, safe, and comfortable administration of the vitamin
Funding: Supported by NIH grants P30 DK056341 (Washington University Nutrition and Obesity Research Center), P30 DK020579 (Washington University Diabetes Research Center), UL1 TR000448 (Washington University Institute of Clinical and Translational Sciences), and T32 DK007120, and the Barnes-Jewish Hospital Foundation
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Prolonged vitamin B12 deficiency can also lead to irreversible damage to the nervous system