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Maturation cocktails combining TLR agonists, pro-inflammatory cytokines, and type I interferons upregulate co-stimulatory molecules such as CD80, CD86, and CD40, enhance IL-12 production, and promote chemokine receptor expression favoring lymph node migration [52, 53]

Halpern, A

I would tend to agree with you Having spent an unhealthy amount of time reading scientific and advocate material about b12 deficiency and it's treatment it very largely does not align with the Google answer quoted

Hydroxocobalamin is often the first choice in clinical B12 therapy due to its extended duration in the body

doi: 10.1210/jc.2007-0768 147 Osei-HyiamanDDePetrilloMPacherPLiuJRadaevaSBtkaiSet al

Mass spectrometry identity MS confirms the molecular weight matches the target sequence exactly proving the compound IS what the label says, not a misfold or substitution