B12 Vitamin Shot The Saint Louis Med Spa How Long Do the Benefits of Vitamin B12 Injections Last? Wow guys, you've been gate keeping!! Got my first B12 injection last week and it's like I am awake for the first time since having kids 20 years ago It's Cyanocobalamin vs Hydroxocobalamin (Vitamin B12 forms) Key Clinical Differences Hydroxocobalamin is preferred in: Pernicious anemia Severe vitamin B12 deficiency Neurological symptoms (subacute combined degeneration, neuropathy) Cyanocobalamin is Are B12 Injections Safe? Should I Get A B12 Shot?