I agree with the statement on selenium since it's been brought out how the thyroid functions best with the higher selenium levels combined with the higher doses of iodine. Selenium helps with regard to the thyroid cannot be left out of the picture as hypothyroid can cause weight gain. But when Iodine is given with low levels of selenium it causes problems for the thyroid.
As trapper brought out the selenium is important in binding up the toxic mercury and fluoride. That may be why the thyroid works better. Yhis is probably why my sister needed 4 200 mcg pills and I only needed one per my CRA person. My sister needing the extra to mop up the extra mercury from her Amalgams and the fluoride from when she was on paxill (not sure how to spell the antidepressant, so sorry).