Are you feeling run down? Low Energy? A quick Vitamin B12 injection can help support energy, metabolism, and overall wellness. It delivers the vitamin directly into the muscle, allowing your body to Vitamin B 12 1000 Injection (VetOne), 100 mL FBN Rx Item Cyanocobalamin 1000mcg 1X30 ML Multi Dose Vial by Hikma Pharma Cyanocobalamin 1,000 mcg mL Injection 30 mL SupremeMed Sandoz Vitamin B12 Injectable Solution 1000 mcg 10 mL Vitamin B12