The intrinsic factor is a glycoprotein produced by parietal cells in the stomach and necessary for the absorption of vitamin B12 in the terminal ileum.
One can improve B12 by consuming all dairy products (milk, curd, cheese) are a good source of Vitamin B12. In addition, one can include red meat once a week to boost vitamin B 12 intake
Pernicious anemia can be caused due to B12 deficiency and malabsorption of the intestines.
One can expect mild redness and pain. You may experience a skin reaction in or around the area in which the injection was placed.
A lack of intrinsic factor leads to pernicious anemia and vitamin B12 deficiency, which can cause anemia and brain and nervous system (neurological) problems.