Self injecting vitamin B12. Quick and painless jabs after a B12 by Dr Caroline Palmer Medium Cyanocobalamin for Injection 1000 mcg Multiple Dose Vials 1ml x 25 Tray (Rx) Do you follow a vegan diet? Did you know that vitamin b12 is mainly present in animal based products so those following a strict plant based are more likely to be deficient in vitamin VITAMIN B12 (Generic) Injectable Solution, 1000 mcg mL, 100 mL vial Easy Refills Chewy Rx