Cyanocobalamin is the most common and widely produced of the chemical compounds that have vitamin activity as vitamin B12
Additionally, patients should be observed for signs and symptoms of megaloblastic anemia, such as fatigue, pallor, and anorexia
B12 injections, specifically, have been identified as a powerful contributor to improved cognitive function
[PubMed Citation] Product label: CYANOKIT (hydroxocobalamin) injection, powder, lyophilized, for solution [Meridian Medical Technologies, Inc.] Last revised: April 2011 [DailyMed] Product label: HYDROXOCOBALAMIN injection, solution [Watson Laboratories, Inc.] Last revised August 2011 [DailyMed] Reade MC, Davies SR, Morley PT, Dennett J, Jacobs IC
PMID 31279840
Just remember to check their services, maybe even call ahead to ask questions