Vitamin B12 is absorbed through two pathways. The first is intrinsic factor, a protein produced by parietal cells in the stomach. IF binds B12 in the small intestine and carries it across Understanding Pernicious Anemia and Vitamin B12 Deficiency Muhammad Qasim posted on the topic LinkedIn B12 vitamin Store How to inject B12 in your arm Vitamin B12 shots: Uses, benefits, and side effects
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