Injections are more effective for those with absorption issues or severe deficiencies, while pills may suffice for mild deficiencies
The discontinuation rate due to adverse events was 6% for CagriSema versus 3.7% for placebo
To Summarize Vitamin B12 injections side effects are incredibly rare, and when reactions occur, they are more likely due to additives rather than the B12 itself
Phil & Jamie Newcomb Phil and I first met in 2015 while working as nurses at Nebraska Medicine

Vitamin B12 shot may be prescribed to prevent or treat the following: Pernicious anemia (a condition in which there are low red blood cell counts due to an abnormality in B12 absorption by the intestines) Megaloblastic anemia (a type of anemia in which there are very large red blood cells called megaloblasts) Cognitive disorders, such as dementia (a disorder characterized by problems with memory, problem-solving abilities, language, etc.) Disorders that affect B12 absorption, such as pancreatic diseases, intestinal infections, Crohns disease, and tropical sprue Cardiovascular disease risk (by lowering blood homocysteine levels, which is a compound associated with an increased risk of heart problems) Multiple sclerosis symptoms Bells palsy recovery B12 deficiencies related to: Weight loss Vegan or restrictive diets Surgery to remove the part of the stomach or the ileum (the last part of the small intestine) Energy and endurance What are signs of vitamin B12 deficiency

Listen in, if you are interested in taking a slightly deeper look at yourself