when I was diagnosed my b12 level was 89. Following the 6 injections over 2 weeks I felt so much better. The pains in my joints disappeared as did my tiredness and there was a great improvemnet in my neurological problems. 3/4 weeks before the first of my three monthly njections, all my symptoms returned. 3 weeks after my injection I felt better but started to feel ill again 3 weeks before my next injection. I had a blood test and my b12 was 400 which is obviously way above the bottom level. I feel dreadful again but know my doctor won't do anything because of my level. Can anyone give me some advice?