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If you think you may be deficient, we strongly recommend adding a B12 blood test to your booking before starting injections
Online Metabolic & Molecular Bases of Inherited Disease, The McGraw-Hill Companies, New York 2001:3897-933 6
Other factors that can cause vitamin B12 deficiency include gastrointestinal disorders, ageing, and certain medications like metformin and proton-pump inhibitors
Antineoplastics that are antimetabolites for the vitamin may induce inadequate utilization of vitamin B12
J., Ayalon-Dangur, I., Ayalon-Dangur, R., Naamany, E., Gafter-Gvili, A., Koren, G., & Shiber, S
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