how much b12 can you inject daily Injections: Who Should Get Them and Long Do They Last? Optimal Vitamin B12 Dosage and
Description
At the 15mg dose, participants lost an average of 52 pounds

GI disease, food allergies, age, stress, and taking drugs and or medications can cause a decrease in activity of any of these, and therefore will lead to B12 deficiency

Trends in Molecular Medicine, 11(9), 421-429

Your body also needs B12 for the development of your central nervous system (your brain and spinal cord)
