half life of vitamin b12 injection Vitamin B12 Monthly Injection Dose: Typical Dosages & Administration Methods half life of b12 injection

You can compare this to cyanocobalamin which requires extra steps to be used by the body assuming it actually makes it into the body through the gut

[DOI] [PMC free article] [PubMed] [Google Scholar] 81.McMichael M.A., Freeman L.M., Selhub J., Rozanski E.A., Brown D.J., Nadeau M.R., Rush J.E

In cases of severe B12 deficiency or experiencing persistent fatigue, weekly shots may be recommended initially, transitioning to maintenance doses as symptoms improve

However, it is important to put this into perspective

Their ability to excrete excess may be reduced, and they are often on complex medication regimens where nutrient-drug interactions are a consideration