What food will get with the intrinsic factor for b12 to get it going again in the liver?

Question

i have had many answers about what to eat for b12 but as the stomach cannot use b12 when there is perniceous anaemia , and it can only be given intraveiniously one can only work on getting the intrinsic factor working again.Eating foods with b12 in does nothing as the body cannot utilise b12 from stomach .

Answer 1

Intrinsic factor is a glycoprotein produced by the parietal cells of the stomach. It is necessary for the absorption of vitamin B12 later on in the terminal ileum.

Upon entry into the stomach, vitamin B12 becomes bound to one of two B12 binding proteins present in gastric juice. In the less acidic environment of the small intestine, these proteins dissociate from the vitamin, enabling it to bind to intrinsic factor and enter the portal circulation through a receptor in the ileal mucosa specific for the B12-intrinsic factor complex.