why do i feel tired after my b12 injection Is it normal to injection? B12 Injections for Energy and

GPs can prescribe B12 injections following appropriate investigation, which should include: Full blood count to identify macrocytic anaemia Serum B12 and folate levels to confirm deficiency (using laboratory-specific reference ranges) Methylmalonic acid and/or homocysteine when B12 results are borderline Intrinsic factor antibodies if pernicious anaemia is suspected Additional tests depending on clinical presentation (e.g., thyroid function, coeliac serology) When both B12 and folate deficiency are present, B12 should be replaced before folate to avoid precipitating subacute combined degeneration of the spinal cord

You should also see a doctor if: Early treatment is key

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There's limited evidence that doses above 600mcg provide additional benefit

It works by blocking your bodys production of certain natural substances that cause inflammation