I will post what I have from RP on iodine later today. Just off the top of my head and not being in a place to access specific information I know that he feels iodine deficiency in modern times, in most place but a few remote areas, is exceedingly rare. I gleaned from reading his work that my previous use of supplemental iodine and idolized salt had probably done more harm than good. It sure felt like I experienced increased oxidative stress during that time, but in all fairness my diet was horrible and I was wasting so the iodine was probably just one more negative and not the sole problem.