b12 injection arm pain What happens if you inject wrong? B12 vitamin Store How to

doi:10.1016/bs.vh.2022.01.016

While anyone experiencing a B12 deficiency can benefit from B12 shots, certain groups are more likely to need them, including: Vegans and vegetarians Elderly individuals Individuals with Crohns disease or celiac disease Individuals taking proton pump inhibitors or metformin which interfere with B12 absorption Side Effects and Precautions While Vitamin B12 shots are usually deemed safe, there might be some potential side effects, such as: Pain or redness at the injection site Mild diarrhea Headache Itching or rash In rare instances, individuals may encounter more intense reactions, like difficulty breathing or anaphylaxis

Hydroxocobalamin is the preferred B12 formulation in the UK due to its longer duration of action compared to cyanocobalamin

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