do i need b12 injections for life Injections: Who Should Get Them and How Long They Last? B12 Shots at Home: How,
Description
Oral administration forces any compound to travel through the gastrointestinal tract, be absorbed across the intestinal epithelium, and then pass directly to the liver via the hepatic portal vein before reaching the rest of the body
doi: 10.1172/JCI9842
[DOI] [PMC free article] [PubMed] [Google Scholar] 68
Older Adults Aging can lead to decreased stomach acid production, impacting the absorption of B12 from food sources
