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Vitamin B12 absorption is a complex process involves the release of the vitamin from food proteins in the stomach, binding to intrinsic factor (IF) produced by gastric parietal cells, and subsequent absorption Subacute combined degeneration of the spinal cord in a patient with nitrous oxide use and autoimmune atrophic gastritis BMJ Case Reports Bariatric Vitamins After Gastric Sleeve: NHS Guide to Supplements Bolt Pharmacy Developments regarding B12 injections being stopped due to COVID 19 B12 Deficiency After Gastric Sleeve: Symptoms, Treatment & Monitoring Bolt Pharmacy
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