I think it's for the beginning to help during detox

Even Cayce advocated hot Epsom Salts (magnesium sulfate) baths during the beginning of Iodine supplementation.

I don't have a tub, but have to go to a sauna (or mow) to sweat extensively. I take a magnesium product (Natural Calm - magnesium citrate) during heavy-sweating episodes. It helps me against constipation and cramps and is also good for those with restlessness issues. Tweet