regardless of the cost or type, i dont believe that level of heightened stimulation can be maintained indefinitely. there is a cost for elemental - oxidation. another way to say it is "burned up." this the danger that barefoot talks about. i dont agree with his interpretation but he is not making it up. Iodine is very corrosive and a fast oxidizer. no one knows long term effects from such exposure over time. it would certainly depend on the rest of the health picture, diet especially.