b12 injection gone wrong Feeling worse after Injection: Answering concerns Possible allergic reaction to B12

These include vitamin B12 deficiency and malabsorption that is caused by the following medical conditions, according to the NIH [1]: Pernicious anemia Tropical sprue Pancreatic insufficiency Surgery in the gastrointestinal tract Certain medications Deficiency in the diet Side effects of B-12 injections Also, according to the NIH, vitamin B-12 injections have some potential side effects, including [1]: Diarrhea Itching Swelling Risk of allergic reaction and anaphylaxis Can Vitamins Aid in Weight Loss

Copper serves as a cofactor for lysyl oxidase and lysyl hydroxylase, enzymes essential for collagen cross-linking and structural integrity

The capsule format minimizes handling steps, which can simplify study design in metabolic and obesity-related research models

Using a compound from an unvetted source introduces risks that are simply not worth taking

In both the UK and Ireland, injectable B12 is classified as a Prescription-Only Medicine (POM)