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At the cellular level, B12 acts as a cofactor for two critical enzymatic reactions: Methionine synthase converts homocysteine to methionine, essential for DNA methylation and synthesis Methylmalonyl-CoA mutase involved in fatty acid metabolism and myelin production By restoring adequate B12 levels, injections enable normal red blood cell maturation in the bone marrow, correcting the megaloblastic anaemia
Certain conditions like polycythemia warrant caution
Compared to oral supplements, injectable vitamins offer better bioavailability, especially for those with gastrointestinal absorption issues
They complement a healthy lifestyle, not replace it
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