vitamin b12 injection iv or im Injections is b12 an intramuscular injection

My daughter goes to the surgery and had never had a 'reaction

rapid IV push of concentrated B vitamins can cause dizziness or flushing

According to the NIH Office of Dietary Supplements, vitamin B12 is available as cyanocobalamin and hydroxocobalamin, which are typically administered parenterally by intramuscular injection to bypass gastrointestinal absorption barriers

Inject slowly down the vial wall

Treated mice displayed myofibers nearly twice as large in cross-sectional area and demonstrated higher contractile strength, with reports of up to 70% greater force compared to untreated groups

[1] So the compound has good membrane-permeability characteristics on the bench, while the demonstrated biological activity in a whole animal was produced by injection