b12 injections and bowel movements Does Vitamin Cause Constipation? UK Medical Facts – Bolt Pharmacy Benefits of Vitamin B12 Shots

doi: 10.1097/01.hjh.0000249702.49854.fa

However, if you are seeking B12 injections for preventative measures or for increased energy and improved mood, many insurance companies view these as elective or preventative treatments that fall outside of essential health benefits

I really needed to switch to injections to bypass my GI system

A deficiency can occur for several reasons, such as pernicious anemia (a condition where the body cannot absorb vitamin B12 from the diet), certain medical conditions (e.g., Crohn's disease, celiac disease), surgical removal of part of the stomach or intestine, or strict vegetarian/vegan diets if not adequately supplemented