There are three main types of vitamin B12 for shots: cyanocobalamin , hydroxocobalamin , and methylcobalamin
C.FriedmanK.SherryJ.BrazzilloK.GenobleL.BhargavaP.et al (2011)
Because the needle stays in the fatty layer, there is less chance of catching a nerve or a blood vessel than with a deeper injection, which is one reason some clinicians prefer it for maintenance dosing
"Minimal Results, But No Serious Side Effects" u/StruggleToFit (Reddit) Rating: (3/5) "Ive been on AOD 9604 for about a month now, and I havent seen any drastic changes
Journal of Physiology-Paris , 93 (6), 479485
It has to be used as directed to get the most benefit and treat your specific condition