For animals, B12 oral supplements are not ideal, as it would require taking large quantities for the right amount to be absorbed
If you are over age 50, the Institute of Medicine recommends that you get extra B12 from a supplement, since you may not be able to absorb enough of the vitamin through foods
Once you are done with this frequency, you may start administering vitamin injections once every month
[58] Medical uses [edit] Treatment of deficiency [edit] Severe vitamin B 12 deficiency is initially corrected with daily intramuscular injections of 1000 g of the vitamin, followed by maintenance via monthly injections of the same amount or daily oral dosing of 1000 g
These effects typically resolve within the first week or two of use
B12 injections bypass the digestive system and deliver the vitamin directly into the bloodstream, which can help improve energy levels, focus, and overall wellbeing