I have been feeling tired, run down and generally unwell for some time. I now have added neurological symptoms, pins and needs, muscle spasms, burning sensation, blurred vision. My B12 levels were tested and found to be 230. I have been told that this is normal. From everything i have read, it seems that although this level is "normal" it can still be the cause of the symptoms I am receiving. I have been back to the GP today as I am feeling really frustrated by constantly felling run down. I was told that it is not because of B12 levels. Just wondering if anyone has any advice of what i can do next?