Doctors use B12 shots as a last resort, such as if a supplement isn't working or a B12 deficiency causing severe symptoms
Not yet in formal clinical trials
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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
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Symptoms, Causes, Prevention Tips, and Supplements Insulin resistance is a common metabolic condition that affects how the body responds to insulin,
