b12 injections and ferritin 18: LABORATORY INVESTIGATION OF ANAEMIA: SERUM IRON, TOTAL IRON BINDING CAPACITY, SERUM FERRITIN, SERUM FOLATE Will daily vitamin B12 (cobalamin)

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Their effectiveness, benefits, and recommended dosage

Update: Our readers suffer from pernicious anemia and need lifelong B12 shots, so we partnered up with a lab in the UK to offer vials of medical-grade methylcobalamin for $129 or less, which can bring the cost per shot down to $3.10-$3.90