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1,2 It is coabsorbed with intrinsic factor, a product of the stomach's parietal cells, in the terminal ileum after being extracted by gastric acid 1,2 (Figure 1 3 )
Gene expression patterns
Examples of these health conditions include those with a lack of stomach acid, those who have undergone bariatric surgery, anemia caused by the inability to absorb the vitamin, other autoimmune digestive diseases, as well as several medications
Clinicians should also consider testing for anti-parietal cell antibodies and anti-intrinsic factor antibodies in patients with histology compatible with autoimmune gastritis
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