how long does a b12 injection take to kick in The Truth About Injections: Benefits, Cost & They Work How Long Does It Take
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Precautions: Allergic-type reactions following the injection of products containing thiamine have been reported

Citations Andrs E et al, "The pathophysiology of elevated vitamin B12 in clinical practice." QJM, June 2013

Most importantly, B12 and folate are both critical in homocysteine metabolism, DNA methylation, and neuro-transmitter synthesis
GI changes (constipation or diarrhea) are more often linked to B12 deficiency or underlying gut conditions that also impair B12 absorption

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The significant quantitative metabolic alterations in Tbx1 +/ mice were provided by univariate analysis, as shown in the volcano plot (Fig 1A)
