how long does vitamin b12 injection stay in your system Injections How Long Do B12 Injections

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Subcutaneous injection is the most common research-context format today, but no published human pharmacokinetic study has formally characterized subcutaneous AOD-9604 (this gap was specifically called out in FDA's December 2024 review)

While very high oral doses (1,000 to 2,000 mcg) can achieve some passive absorption without intrinsic factor roughly 1% of the dose is absorbed passively many clinicians prefer the reliability and rapid correction offered by injections in this population

Mitochondrial Oxidative Capacity AOD-9604 substantially increases whole-body fat oxidation with elevated plasma glycerol levels (an index of lipolysis)