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Vitamin B12 (also called cobalamin) is a water-soluble vitamin your body relies on to make energy, protect your nerves, and produce healthy blood cells
Vitamin B12 is key to nerve health
While oral supplements work for some, injections provide several distinct advantages: Immediate Absorption Directly enters the bloodstream, bypassing digestive barriers
A rat study reported 38.4% oral bioavailability, while human oral and subcutaneous exposure remain unknown
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