arm sore after b12 injection How to self-inject intramuscular vitamin - Overview Common Side Effects From Vitamin
Description
Safety and Possible Side Effects Vitamin B12 injections are generally safe when administered correctly

Subcutaneous injections are administered into fat under the skin, so instead of the needle going in at a 90-degree angle, the subcutaneous injection angle is at 45 degrees so that it pierces the skin but not the muscle tissue

What dose should be given

But what about injections

This is similar to having a pimple, what I call the zit effect
