Hi, I am afraid you will not get the right sort of help on this forum - most advice is being given by mega dosers who have been doing it for years and most of which had no underlying issues, or if they did it was temporary. Here's what I have learnt - if you have hashimotos or think you may have it you should address the problems caused by the hashimotos first. Taking massive doses of Iodine with undiagnosed hashi's will quite likely cause your issue as your adrenals will have been weak for many years. I am afraid the companion nutrients are only going to go so far and work better for bog standard Iodine deficiency. Although an underactive thyroid is primarily caused by lack of iodine, by the time you have symptoms a lot of other issues and deficiencies will be present. There are numerous root causes for an underactive thyroid, and although taking Iodine may help it is only a small part of the answer. You may have high reverse T3 which means iodine won't help much, you are likely to have low iron, vit D, B12 etc etc - whack a high dose of iodine on top of that and your adrenals will get very stressed - ie hair falling out. Can you afford blood tests?