I have hashimotos and take a lot of Iodine (at least 50 mg/day) and fast a lot.
I no longer take thyroid hormone. That change occurred after 6 months or so.
It's been more than a year and I'm still not 100%. I believe I'm still detoxing a bit. The latest is the dreaded "liver fire". I did have my mercury poisionings removed about 6 months ago, so it's probably still that garbage coming out.