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Injectable B12 bypasses this entirely and achieves near-100% bioavailability
Subcutaneous injection is the most frequently described route, with oral and localized administration also discussed in the literature
These observations align with improved peripheral blood flow from nitric oxide-mediated vasodilation, though they could also reflect placebo effects or confirmation bias
After reconstitution, refrigerate between 2 and 8C and use within 7 to 14 days
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