Does Iodine supplementation help with hyperthyroidism as well hypothyroidism? I'm asking because my dog's latest bloodwork had a few results that could possibly point to a hyperthyr. issue. Her phosphorus was low and the calcium is starting to go up. Both of these could indicate hyper. Also, her free T4 is starting to get close to the upper end of the normal range. It was suggested that I contact this group to check into Iodine supplementation. I personally have just started myself (NOT for hyperthyroid) a few weeks ago on a very small dose and will gradually increase. I greatly appreciate any assistance.