vitamin b12 is essential for the proper functioning of the small intestine.
vitamin b12 is essential for the proper functioning of the small intestine.
vitamin b12 is essential for the proper functioning o?
small intestine
vitamin b12









































vitamin b, also known as cobalamin, is a water-soluble vitamin that is involved in the metabolism of every cell of the human body: it is a cofactor in dna synthesis, and in both fatty acid and amino acid metabolism. it is particularly important in the normal functioning of the nervous system via its role in the synthesis of myelin, and in the maturation of developing red blood cells in the bone marrow.
vitamin b12
bullet::::- intrinsic factor (if): intrinsic factor is produced by the parietal cells of the stomach. vitamin b12 (vit. b12) is an important vitamin that requires assistance for absorption in terminal ileum. initially in the saliva, haptocorrin secreted by salivary glands binds vit. b, creating a vit. b12-haptocorrin complex. the purpose of this complex is to protect vitamin b12 from hydrochloric acid produced in the stomach. once the stomach content exits the stomach into the duodenum, haptocorrin is cleaved with pancreatic enzymes, releasing the intact vitamin b12. intrinsic factor (if) produced by the parietal cells then binds vitamin b12, creating a vit. b12-if complex. this complex is then absorbed at the terminal portion of the ileum.
digestive enzyme