Vitamin B12 deficiency almost always arises through intake disorders, which affect people of all eating habits alike
If you have a temporary deficiency or increased requirement (say, after a surgery or during recovery from an acute illness), you might only need a short course, perhaps a few weeks of injections, until your vitamin levels normalize or you can meet your needs by mouth again
Finisguerra V, Di Conza G, Di Matteo M, Serneels J, Costa S, Thompson AR, et al
However, it's important to note that most of the current understanding is based on preliminary research, primarily from animal studies
To fully model intra-abdominal hypertension syndrome (continuous intraperitoneal insufflation of ordinary air), these occlusion syndromes have been induced peripherally (Vukojevic et al., 2018