b12 injection side effects sore throat Does the Vitamin Shot Have Effects? What Does a B12 Shot
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link Neelakantan H, Vance V, Wetzel MD, et al
primary literature
Inherited disorders of folate and cobalamin transport and metabolism (updated chapter in OMMBID)
But there is no published human study measuring how much of an oral dose actually reaches the bloodstream
The clouding reflects solvent choice, not a defect in the powder
