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PMCID: PMC11050313.
These reactions are central to ATP generation, DNA repair, and cell signaling, so adequate B supports energy levels and normal cell function
Unlike oral supplements, which require daily use and may result in inconsistent absorption, injections deliver a high concentration of the vitamin directly into your bloodstream, allowing for longer-lasting benefits and fewer treatments
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The absence of FDA approval means that use represents an off-label application requiring informed consent and medical judgment
Why don't B12 pills work as well as injections
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