Taking large doses of iodine is still controversial. While most agree that taking up 225 mcg(a bit less than 1/4 of a mg) a day of iodine supplements is safe, some recommend that people take up to 50 mg a day of iodine for optimal health. They advise this especially for those who have low body temperature, or heavy metal txicity.

http://www.iodine4health.com/special/metals/abraham_metals.htm

Perhaps you could take a middle of the road approach, and take 1-5 mg a day of iodine? I am taking around 15 mg a day of iodine, but may cut back on this after a month or two. I have a feeling I have been very iodine deficient, and have had low body temperature(96.5-97 degress orally in the AM).