In deficiency, the body makes abnormally large, inefficient cells (megaloblastic anemia)
Depending on your body and the severity of your deficiency, B12 injections can start to work in a matter of hours to a few days
A lift in mental fog: Brain fog is one of the most frustrating symptoms of deficiency
[1] [2] Blood levels of B12 may rise quickly following injection, though elevated blood levels do not immediately translate to symptom resolution
If you have a vitamin B12 deficiency, you are a great candidate for vitamin B12 injections, as they will immensely improve how you will begin to feel when you start the treatments
Neurological Changes : Numbness, tingling, and weakness in hands and feet from nerve damage