How often should vitamin B12 injections be administered and how frequently should laboratory monitoring be performed? 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 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 How Often Should I Get Vitamin B12 Injections? Everything You Need to Know Genevieve & Co. B12 Injections: How Often Should You Take Them? Invigor Medical Vitamin B12 Injections: Boost Energy & Support Weight Loss