route of vitamin b12 injection Best Site: Administering B12 Shots Vitamin B12 Injection For Cats:

Today however, the shot barely hurt but half an hour later I got a shooting pain down my arm and around my elbow, its now spread into my armpit but it doesnt really go down to my wrist its mainly upper arm and armpit but its slightly creeping into my neck and shoulder

Then theres the placebo effect

Recreational use of nitrous oxide has increased rapidly in recent years and is now the second most commonly used recreational drug among young people in the UK

So, unless youre deficient, megadoses of vitamin B12 may be just passing through your body and making some organs work harder (NIH-a, 2021)

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