Such reactions are generally mild and resolve within a few days
In cases of suspected cobalt hypersensitivity, an intradermal test dose should be administered
My daughter has them too, less frequently than me, but I was only diagnosed after they tested her whilst she was doing her nursing training as she kept fainting
There is After having a B12 shot, a person should monitor for adverse symptoms and seek medical help if they experience: severe pain at the injection site mild diarrhea a swelling sensation in the body temporary itching of the skin In rare cases, a person may also be at risk of: anaphylaxis pulmonary edema congestive heart failure peripheral vascular thrombosis, which involves blood clots polycythemia vera, which is a type of blood cancer If anyone experiences difficulty breathing, hives, or swelling, they need emergency medical help
B12 is present in a variety of food sources (mainly animal-based products), where it is bound to protein molecules
Unregulated online powders have none of those assurances