I recently changed from using Lugol's iodine to just potassium iodide. I noticed quite a large positive difference. I could only tolerate small amounts of Lugol's before an adrenaline rush. While with iodide I can take larger amounts (15mg) with positive results such as temperature and more energy. I've found a couple of rat studies that show different t4 and t3 levels depending on the source. Has anyone else noticed something similar?