Originally Posted by
*****3nin.vend3t
But what if its something in his diet that is causing it???...
There are certain foods called goitrogens which can ne a factor in thyroid disease, another cause can be iodine deficiency which is rare in the U.S. because iodine is added to salt.
You would have to eat a lot of goitrogens such as broccoli to have an effect. I don't believe they cause hypothyroidism but could make it worse if you have it.
Hypothyroidism is most commonly caused by autoimmune disease. A proper diagnosis should be made by an endocrinologist.