I went to the endocrinology clinic yesterday (and yet again I got to see a different endo) and he mentioned something that I've not heard before, he asked had I had my TPO tested? I said I didn't even know what that was and he said this is normally done when you first get diagnosed but he could see on my record that it's never been done. I'm a bit blurred with the facts as I was so happy that he seemed to actually be looking for a cause rather than just saying all my levels are ok that I can't remember properly what he said but the gist of it was that if a blood test shows that something is attacking the thyroid ... or with it the TSH level? ...then I would need to be prescribed a course of selenium. I can't wait for my results to come back as this just might be the little thing that makes all the difference to me. I'm surprised though that I've not heard about this TPO level?