Some people assert that if you start supplementing with Iodine, two different effects may result, depending on what dose you start at:
Effect: Up-regulation of thyroid synthesis, especially for those who are Iodine deficient (many people are Iodine deficient, so that makes sense). However, if your adrenal function is down, the cells cannot handle the increased levels of stimulation (via thyroid hormone) without a correspondingly elevated level of cortisol.
It is known that thyroid hormone and cortisol work together. Hence, in the situation of adrenal insufficiency (possibly Mercury-induced in the first place, for some) there is the potential for an adrenal failure-induced “Crash” (= feeling dreadful +/- palpitations =”Thyroid toxicity”). So in these two situations… (a] adequate, vs b] inadequate adrenal function…taking Iodine may make you feel better or worse