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Continue taking your usual medications unless our providers give you different instructions
Doctors often recommend B12 injections for folks who have a true deficiency or trouble absorbing B12 naturally, not just for energy or weight goals
There should be no clumps or residue collected at the bottom of the vial
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Benzyl alcohol is a common issue
This timeline matches B12 pharmacokinetics: intramuscular methylcobalamin reaches peak serum concentration at 8-12 hours, but tissue saturation (particularly in the liver and nervous system) occurs over 48-72 hours as the vitamin is transported into cells and converted to active coenzyme forms (Andrs et al., 2018)
