Well thank you all for replying to my previous post. I had a phone consultation today with my Endo who agreed that it was too low and he will be writing to my GP to ask for injections of B12 to begin. I'm very pleased with the outcome. He didnt feel it necessary to do any further blood testing. He said that sometimes the results can be a bit skewed but it is clear that from my previous tests over the last year that the levels are consistently dropping........... 460 down to 440 down to 315.
He said that my constant tingling tongue was consistent with low B12 and said that there would be no harm in trying the supplementary injections.