I remember you from many years ago on BT...!

Yes, I have Hashimoto's thyroid disease (based on anti-TPO 900+), as do the majority of MY family! Both sisters, father, 5/6 aunts and uncles on my dad's sides, most cousins on that side, and my niece was just diagnosed this year... the first of this new generation.

Diarrhea improving after removing breads and pasta sounds like probable gluten sensitivity to me! The blood tests are good but not perfect at detecting it. Also, ten years ago they were ignoring gluten sensitivity unless it was full blown celiac disease. That is beginning to change.

I think you have probably already addressed the potential for B12 deficiency, something we used to spend a lot of time talking about.