do b12 injections really work for Energy: How they work? The Truth About B12 Injections:

Innovations in regenerative medicine, tissue engineering, and personalized medicine are on the horizon, driven by ongoing research and development

It is easy to administer and can be stored for a long period, especially if it is refrigerated

One review of seven studies showed that both methylcobalamin and a vitamin B-complex containing cyanocobalamin were effective in reducing symptoms of diabetic neuropathy, a complication of diabetes that leads to nerve damage ( Additionally, several animal studies have found that each form could have neuroprotective effects and may be beneficial in treating conditions that affect your nervous system ( SUMMARY Both methylcobalamin and cyanocobalamin can treat vitamin B12 deficiency

doi:10.1016/s1808-8694(15)31266-0