Thank you Paul and Glenn, and this is so true: I didn't know to ask for a B12 test, that's why I was going to doctors! They failed me, I really don't feel I failed me. I started taking B12 to help myself because I felt no one else was helping. Now, I may never know if I have a true deficiency, although, being a celiac, and having been undiagnosed for so many years, there really is no doubt in my mind that I was deficient of many vitamins and minerals. I know the B12 has helped me. My regular doctor, doesn't doubt the fact that it is helping me, my neurologist I also, doesn't doubt it is helping me. He left the decision to stay with B12 pills or to have the shots, up to me. From here, I guess I stay with what I am doing.