I'm no doctor, but recently I've read that studies found pesticides on food to be a contributing factor thyroid problems.
Plus ingredients in the personal care and beauty products (this why thyroid disorders are commonly affecting women and "high maintenance" men;
exposure to radioactive substances (NOT x-rays, but chemicals such as I-131 and cesium-137)
taking birth control and weight loss pills before age of 35
EXCESS of iodine (causes autoimmune reaction); not everyone require same amount
Perchlorate and fluoride chemicals
thanks , it seems more common ,all the time but it shocking that there is not more research on better treatment for suffers