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doi: 10.3390/nu11092232

The process involves: Dissolution in the stomach Binding to intrinsic factor Absorption in the ileum (small intestine) Transport through bloodstream to tissues With proper oral B12 dosage, supplementation can gradually restore normal levels, especially in cases of dietary deficiency

According to the NIH Office of Dietary Supplements, vitamin B12 is available as cyanocobalamin and hydroxocobalamin, which are typically administered parenterally by intramuscular injection to bypass gastrointestinal absorption barriers

Access this article Similar content being viewed by others References Al-Gabr H M, Zheng T, Yu X (2013)