side effects to b12 injections What are the benefits of injection? Vitamin B12 Injection: Uses, Benefits,

Subcutaneous administration of vitamin B12 is sometimes employed, especially in patients with congenital cobalamin metabolism disorders who require high doses to maintain normal metabolic pathways

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These include: Pain, redness, or swelling at the injection site Bruising or hardening of tissue (induration) Itching or warmth around the injection area Temporary discolouration of the skin These localised reactions typically resolve within 2472 hours