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Intrinsic factor is produced by parietal cells of the gastric mucosa (stomach lining) and the intrinsic factor-B 12 -complex is absorbed by enterocytes in the ileum's cubam receptors
The kidneys are responsible for clearing excess B12 from the blood
Appl Microbiol Biotechnol 115 Mi M, Wu F, Zhu J, Liu F, Cui G, Wen X, Chen Z (2021) Heterogeneity of Helicobacter pylori strains isolated from patients with gastric disorders in Guiyang
User 31 described gradual shoulder recovery using only oral capsules dosed at 500mcg twice daily, although noticeable improvement reportedly took several weeks
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