Below is the response that I got from Dr. Pete, who is a doctor we consult with if we don’t know the answer: ——— Before bed, use Lugols Iodine, and paint a 3-inch square patch on the inside of your forearm, the inside of a thigh, or your abdomen. The next morning, inspect the painted area. If all the color remains, then your iodine level is adequate. If all the color is gone, then you definitely have an iodine deficiency. Varying degrees of color loss correspond to your degree of iodine deficiency. Dr Pete requires this degree of confirmation before moving onto his next course of action, or frequency set suggestion. You can probably find Lugol’s Iodine at your local health food, or supplement store. But if not – here is a link: http://healthproducts2.com/hulda-clark-liver-cleanse-parasite-cleanse-colon-cleanse-kidney-cleanse/lugols-iodine