how long do b12 injections take to kick in Quickly Does a Shot Work? How Quickly Does B12 Shot
Description
For a lot of people, the change shows up somewhere in the first one to three days

Hydroxocobalamin injections may be prescribed to patients with vitamin B12 deficiency Other Uses Hydroxocobalamin B12 helps the body convert fat and carbohydrates to energy and may be beneficial as part of a weight loss program

Journal of experimental pharmacology, 4, 149155

Behere, Rishikesh V et al
