No need to take 12.5 Iodoral indefinitely.
Your body can store 1.5 grams max, 15,000 mg. That is why I suggest an IR load of 750mg then drop to a maintenance dose. For maintenance, 6.26 mg every other week plus iodized salt should be adequate in most situations.
Fire retardant clothing can also contain some metallic compounds may need consideration.
I worked with a guy who was a fire fighter. They had firepants that they had to wear while on duty. The fire retardant was antimony based. There were a lot of health problems and wrecked hormones.
That should be taken to a different thread, not in this sticky.
If you take 50mg iodine per day, any bromine dumping would be greatly accelerated. You may need that to drive that process.