Choosing the Right Needle and Syringe for B12 Injections: A Complete Guide B12 INJECTIONS WESTON HCG CENTER Vitamin B12 Injections B12 shots can help with energy, focus, and just feeling better. My personal experience with this injection is not realizing I felt like I was living under a dark cloud. until I felt like I wasnt. Feeling low on energy lately? B12 injections can give your body the boost it's craving. This little vitamin packs a punch and is loved for: Increased energy & reduced fatigue