Not intending to be negative, but stage IV metastatic can't be undone simply by taking iodine. Lack of Iodine in the first place appears to be a contributing factor, or as some MD's have commented, lack of Iodine promotes cancer. But taking Iodine isn't a cure - once the metabolic shift has occurred, the means for reversal are more involved, but definitely do-able. I think very few out there are knowledgeable enough to advise anyone successfully. I have a Stage IV friend they sent home to die 2 years ago but who is doing well these days, maybe she'll chime in. I'd suggest to find someone who has beaten it and listen to them if they're willing to devote time to helping.