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pernicious anemia b12 injections not working π€―Many People May Be Misdiagnosed With Anaemia π€― You learn something new every day This is most definitely a new one for me! And the reason is something most people including What Conditions Do B12 Injections
Description
If you have symptoms of vitamin B12 deficiency, you should see a medical provider for a proper diagnosis, which usually involves blood testing

Checking the flow of a new multi-dose pen If youre not using a new pen, you can skip this step

Not being a medical professional, I would have like to see what 0.25 ml looks like in a 1 ml needle
doi:10.1146/annurev.nutr.19.1.357

I have just googled the reason its because of the time taken up by nurses giving the injections