why would someone need vitamin b12 injections

why would someone need vitamin b12 injections The Advantages of Versus Oral Supplements: Shawn Veiseh, M.D.: Family Medicine Should You Take Vitamin B12

Name: why would someone need vitamin b12 injections The Advantages of Versus Oral Supplements: Shawn Veiseh, M.D.: Family Medicine Should You Take Vitamin B12
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Certificate of Analysis (COA) for this batch is available on request

Aug 1990;55(3):439-53

Post-Surgical Care: Patients who have undergone gastrointestinal surgeries, such as gastrectomies or ileal resections, may face challenges in absorbing B12 from food due to changes in the digestive process

B12 absorption is regulated through intrinsic factor, which is produced by gastric parietal cells in the stomach, with the B12-intrinsic factor complex being absorbed in the terminal ileum