VITAMIN B12 INJECTION Vitamin B 12 5000 mcg ml, 100 ml Ferguson and Associates Equine Hospital Vitamin Injections Des Plaines, IL Vitamin Deficiency Treatment Oral vs. Intramuscular Vitamin B12 in Vitamin B12 Deficiency The Blood Project NEW TREATMENT ALERT A vitamin B12 injection helps treat or prevent deficiency by delivering the vitamin directly into the bloodstream. It's often used for people with absorption issues and is usually safe