vitamin b12 injection reaction Side Effects and Safety Compounded Cyanocobalamin (Vitamin B12) Injection
Description
These are separate studies with different designs, different species, and different dosing regimens from the AOD-9604 intraperitoneal data

The answer involves MTHFR mutations

The observation of reticulocytosis which usually occurs between the third and tenth day of therapy confirms the diagnosis of vitamin B12 deficiency
Slower Correction Restoring levels may take longer compared to injections
