The test is the Iodine loading test, developed by Dr. Flechas. In fact, his lab processes all the tests. This is it, in a nutshell. Discard the first morning urine, take 50 mg iodoral in one dose, collect urine for next 24 hrs (plan to be home that day!) Next morning (last collection), measure amt., fill out paperwork, send sample (FedEx) and await results. If the body is saturated, at least 90% should be excreted in the urine.