where are b12 injections given on the body How to Give a Injection: Step-By-Step Instructions Treating Severe Vitamin B12 Deficiency
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This is crucial

2022 Oct 25;10(11):2697

I am using the use Intramuscular way

Which of course lead me to wonder, but how does anyone know what the good stuff is

Why Do B12 Shots Require a Prescription