Vitamin B12 Shots in Canton, MI: What You Need to Know Vitamin B12 Injection When? Frequency, Benefits & Indications How often should vitamin B12 injections be administered and how frequently should laboratory monitoring be performed? B12 Injection sites + How to use B12 Shots Safely When that Vitamin B12 injection kicks in , B12 helps boost your energy, improve mood, support brain function & metabolism, and even strengthen hair, skin + nails , Who doesnt love a healthy