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Fatigue and Headaches : A few individuals report feeling tired or experiencing headaches after receiving the injections, although these symptoms are typically transient
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
Injections (commonly hydroxocobalamin in the UK) Oral supplements Oral B12 can be helpful in some cases, especially where deficiency is dietary and absorption is adequate
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