does the b12 injection hurt How Often Should You Have Injections? Vitamin B12 shots: Uses, benefits,
Description
While all of the B vitamins are necessary for the generation of energy, vitamin B12 is particularly crucial
Obesity Reviews (2004) 7

Yet, that is what happens when a person with symptomatic B12 deficiency experiences that she or he needs more frequent supplementation than once every 3 months

First time using this & Im loving it so far have so much more energy I lost a bit of weight, but I am going to continue to see if it works

Bruning, U

Retrieved 28 March 2007
