side effects to vitamin b12 injections Shots And How Treat Them A vitamin B12 deficiency was

The active moiety is identical molecular weight adjustments account for the salt mass when calculating equivalent doses.

10.1160/TH09-11-0748 31 GoracyI.CyrylowskiL.KaczMarczykM.FabiAnA.KoziarskaD.GoracyJ.et al (2009)

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This marker is more accurate in assessing the biologically active fraction of vitamin B 12 in circulation than serum B 12 itself, and its level correlates well with the concentration of vitamin B 12 in erythrocytes (Valente et al., 2011)

doi:10.1016/j.intimp.2007.10.017 Tsubura S, Suzuki A

Your doctor may either assure you that your B level is fine (so no B needed), or they will arrange B shots in tandem if necessary