Vitamin B12 Injections: What You Need To Know What are Vitamin B12 injections Vitamin B12 injections are used to quickly raise your B12 levels when they're low or when your body can't absorb it properly from food or tablets. What How Often Can You Get a B12 Shot for Maximum Health? It might not be your lifestyle it could be a B12 deficiency. B12 is essential for energy, mood, and overall wellness and when levels are low, your body feels it. Our Best Vitamin B12 Injections Dosage And Frequency PA Relief How Often Should I Get a B12 Shot? An Expert Guide