Not posted for what seems a long while, I have been working on exclusion diets.
What a revelation - so far gluten, alcohol (especially real ale) and coffee (well caffeine variety) are really to be excluded if I possibly can. Also, too much dairy does not seem helpful - perhaps not as much as the others.
I have found that I need to resist to have a significant impact.
I can only encourage others who have yet to find the final solution from T4 alone, to consider this approach.
I have posted previously here how much I had liked filter coffee and felt it had been good for my thyroid - I have had to change my views, very reluctantly!