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Patients in this borderline range should not dismiss symptoms simply because their B12 level is above the strict cutoff clinical context and additional testing matter
Give the shot slowly
Fatigue Heart palpitations Pale skin Weight loss Infertility Difficulty in thinking and remembering Numbness and tingling in the hands and feet
Elevated cobalamin in childhood (2025) What was found: a retrospective review of 388 children with a very high B12 at a large hospital in Ankara
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