I know I keep harping on about B12 but I can't stop myself as it seems to be so often connected to people with thyroid conditions. So, this may be helpful to those trying to convince the unconvincable or self diagnose or treat:
b12d.org/sites/default/file...
Although this mentions later on in the article about the more accurate Active B12 test and clearly states diagnosis should not just be based on blood test results, it does still go into detail about the levels and what they mean. I think this is a little misleading because it could still make people think they do not have PA or a B12 deficiency or it is only moderate because of the low levels quoted. The web site does though mention what needs to change in the diagnosis and treatment: