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B12 supports myelin production the protective sheath around nerve fibres
10.1016/j.sajb.2007.03.006 116 NiehlA.LacommeC.ErbanA.KopkaJ.KrmerU.FisahnJ
10.1089/ars.2016.6866 82 YuF.YuC.LiF.ZuoY.WangY.YaoL.et al (2021)
The FDA reviewed months of additional follow-up data submitted by Moderna to confirm the vaccines effectiveness against COVID-19
5.3 Masking of Folate Deficiency with Vitamin B12 Use Doses of vitamin B12 exceeding 10 mcg daily may produce hematologic response in patients with folate deficient megaloblastic anemia and may therefore mask a previously unrecognized folate deficiency
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