b12 injection is what drug class Compounded Cyanocobalamin (Vitamin B12) Best Vitamin B12 Injection Site:

This guide covers every angle of the semaglutide methylcobalamin combination, from the science behind B12 depletion during GLP-1 therapy to the specific formulations available, the dosing protocols clinicians use, and the honest assessment of whether this compounded product delivers on its promises

Stomach acid and a protein called intrinsic factor, which is produced in the stomach, must be present for B12 to be absorbed from food

Vitamin injections allow you to get the nutrients you need without the digestive discomfort of oral supplements

It may be that the process of testing for pernicious anaemia is being overlooked and that interval tests are not being done for borderline cases with minimal/non-specific symptoms