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Blood work can confirm whether you have a B12 deficiency or not
This substitution may increase the half-life of the peptide by protecting it from enzymatic cleavage and degradation
People with stomach or gut issues absorb less
However, this is not diagnostic and would require a detailed review with your doctor
Commonly referenced guidance includes: Initial replacement Maintenance For maintenance, the BNF lists adult prophylaxis/maintenance dosing such as 1 mg intramuscularly every 23 months in appropriate cases
This is because certain factors can affect the normal dose of B12 injection
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