The only experience I had with an Iodine similar to nacent, was detoxified iodine; some Cayce receipe.
It caused throat pain only, no benefits or detox, just a throat pain. Tried it for a few months.
Lugols never caused this, but it caused a detox, and a cure after that.
As the Nacent testimonials mainly are from Africa and India, terribly low in iodine..; I wonder if; maybe whatever Iodine they took in would have a good effect.
Like giving them a vitamin pill; their bodies would probably suck it all in in a minute.