B12 Shots for Energy: Do They Work, Who Needs Them & What to Expect Greenwich Medical Spa VITAMIN B12 (Generic) Injectable Solution, 1000 mcg mL, 100 mL vial Easy Refills Chewy Rx Vitamin B12 Shots Confer No Benefit vs. a Supplement Gene Food Compounded Hydroxocobalamin (Vitamin B12) Injection Vitamin B12 Oral vs Injection 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