b12 injections after gastrectomy Effect of Vitamin Replacement Intervals on Clinical Symptoms and Laboratory Findings in Gastric Cancer Patients Total How to Get Methycobal B12
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[23] Antivitamin B 12 compounds (often synthetic B 12 analogues) not only have no vitamin action, but also actively interfere with the activity of true vitamin B 12

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Nature 504, 446450 (2013)
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McFarland, K