how to give yourself a vit b12 injection Instruction Guide for Intramuscular (IM) Self-injection of Methylcobalamin 1mg/5mg Vitamin B12 Injections
Description
123 Vitamin B 12 can block factors that facilitate infection with SARS-CoV-2
[2] What Causes Elevated Vitamin B12 in the Body

It's important to stick to your b12 schedule

If youre curious about how different foods affect your body

They help health and social care professionals to prevent ill health, promote good health and improve the quality of care and services

As to the pain "going in" it may be that the needle caught a nerve or vein plus the fact that you were probably a little tense and nervous
