b12 injections after gastrectomy Vitamins surgery : r/GastricBypass condition that requires gastrectomy followed

condition that requires gastrectomy followed by b12 injections Clinical Course of Vitamin Deficiency and Associated Risk Factors in Patients After Total for Gastric Cancer Vitamin B Complex Deficiency After Feasibility of Oral Vitamin B12 Supplementation After Total Gastrectomy: Single Institution Cohort Athenaeum Scientific Publishers How can vitamin B12 deficiency be prevented in patients after gastrectomy? I receive monthly intramuscular vitamin B12 (cobalamin) injections, but my serum B12 level measured two weeks after the injection is only 268 pg mL; why is it low and how should the dosing

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