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Only One Chance B12 Deficiency Pernicious Anaemia Society Gastric Intrinsic Factor & Vitamin B12 Binding Intrinsic factor is a key glycoprotein secreted by gastric parietal cellsessential for the absorption of vitamin B12 in the terminal ileum. Without it, even How do intrinsic factor antibodies cause falsely elevated vitamin B12 levels? Best Vitamin B12 Injection Dose and Frequency PA Relief
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