@Framerboy I can't remember hardly any details but from what I do remember supplementing Iodine can expose some sort of toxic (buzzwords are fun) type of buildup in your thyroid that one might not be aware of otherwise until it becomes a somewhat serious issue. Phosphors? Fluoxysomethingorother or something? The release of whatever nasty shit is in there makes people sick and they often stop the therapy because they blame the iodine.
Might be an angle too look at in your research, I think I learned about this in relation to the Fukishima reactor disaster. Iodine protects the thyroid from radiation so maybe it's of use for other reasons as well idk