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Conclusion Whilst severe B12 deficiency has a clear clinical picture with characteristic haematological and/or neurological features, establishing mild or borderline deficiency can be problematic as serum levels are maintained at the expense of tissue concentrations, and therefore serum levels of B12 may be in the low normal or borderline range despite a deficiency

Tirzepatide injections require specific needle selection to balance medication delivery with patient comfort, as needle gauge and length directly influence injection site reactions and drug absorption rates

Subcutaneous means below the skin

Neurological: pins and needles, numbness, balance problems, cognitive brain fog, memory issues