I hate to disagree but I disagree I have hyperthyroid and if I do not consume Iodine I have heart palpitations headaches and land in the hospital. You might want to do some reading on post by Dr. Mercola he references several studies in which hyperthyroid was halted with Iodine and lithium. He also cites a doctor Wright in California. Who has done a lot of work with thyroid issues and Dr. Wright advocates iodine. I cannot tolerate the anti-thyroid drugs that they give out like candy so I had to do this with dietary choices.