b12 vitamin injection uses Best Site: Administering B12 Shots Vitamin B12 Injections vs. Supplements:

No IGF-1 Stimulation Multiple human clinical trials confirmed no changes in circulating IGF-1 levels following AOD9604 administration [5]

In certain regions of the world, marginal or subclinical vitamin B 12 deficiency may be fairly common in other age groups as well, including children, premenopausal women, and pregnant women, primarily due to low intake of animal-source foods (reviewed in 5)

Designed to help evaluate common health concerns and determine if treatment is appropriate

Vitamin B12 is a water soluble vitamin necessary for the bone marrow to produce red blood cells

I havent experienced any side effects other than mild headaches occasionally