Inadequate secretion of intrinsic factor, resulting from lesions that destroy the gastric mucosa (which can be caused by ingestion of corrosives, extensive tumors, and conditions associated with gastric atrophy, such as multiple sclerosis, certain endocrine disorders, iron deficiency, and subtotal gastrectomy) Structural lesions leading to vitamin B 12 deficiency, including regional ileitis, ileal reactions, and malignancies Competition for vitamin B 12 by intestinal parasites or bacteria
What Is The Frequency Of Maintenance B12 Vitamin Injections
2011 Sep;12(8):453-62
And Hempill-Bryant reminds her patients that no matter what your diet is, you need a prenatal vitamin that includes folic acid, otherwise known as vitamin B9
Proceedings (Baylor University
Need a Boost with Vitamin B12 Injections