Re-ingestion allows for absorption of nutrients made available by bacterial fermentation, and also of vitamins and other nutrients synthesized by the gut bacteria, including vitamin B 12
For instance, atrophic gastritis reduces stomach acid necessary for releasing B from food proteins
[DOI] [PubMed] [Google Scholar] 238.Ahmadian M, Duncan RE, Varady KA, Frasson D, Hellerstein MK, Birkenfeld AL, et al
Complex roles of nicotinamide N-methyltransferase in cancer progression
Vitamin B12 (cobalamin) is essential for healthy nerve function, red blood cell production, and DNA synthesis
When a clinic needs to purchase vitamin b12 injections online, the legitimate route verifies the prescriber and the patient before stock moves