I didn't notice any change in my thyroid symptoms while Water Fasting or any type of fasting for that matter. It would be interesting to have blood levels checked before, during and after -- but I can't afford that. Maybe someone will invent a home testing device for hormone levels someday.
There is so much conflicting advice these days that it's almost laughable -- isn't it?! But I still love hearing what other people have to say and reading what they have found. Ultimately, I simply try to choose what is best for me and leave others to do the same. Maybe the real trick is simply balance and moderation in all things...