Trapper do you mean SSKI or Lugols? I thought Lugol's had a lower limit than SSKI .
Knowledge seeker, I routinely take from 200-300mg/day of Lugols and I'm fine as long as I also take the cosupplements. I think Lugol's is super for breast cancer. I use it (post treatment) for my BC and it hasn't come back yet, and they thought it would by now. I do not know about Iodine as a primary treatment, although I read about a study on how it slowed cancer cell division in a group of women before their surgery. This might encourage you: http://jeffreydach.com/2009/11/13/iodine-against-breast-cancer-the-overwhelmi...
Good luck and please keep us posted on how you are doing.