this type of anemia is treated with b12 injections Vitamin Deficiency in Pernicious Anemia: A Hemolytic Mimic Pernicious Anemia: Definition, Symptoms, Causes
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[21] [22] Initial tests typically include full blood count, kidney and liver function, thyroid function, HbA1c, ferritin, inflammatory markers, B12/folate, and coeliac serology
We issued our statement on the guideline and our CEO, who is also the Chair of the B12-Alliance, was instrumental in the text and publication of the statement of CluB-12

PMID 34199569

Summary: Low B12 commonly causes neurological symptoms (pins and needles, balance problems, memory issues) and haematological features (fatigue, breathlessness, sore tongue), which may develop gradually over months
