are you trying to kid us? damage to the cells in the gi tract? of course Lugols damages cells. it damages all cells if its strong enough. thats why you can paint too much with 5%. it will burn the skin and make it raw.
but geeze o pete, the GI tract is killed all day long by everything you shove into your pie hole. every morsel is toxic. the GI tract replaces that layer about four times a day if memory serves me right.
whats next? sounding the alarm for H2O? a gallon all at once in the gut can kill ya. so can a couple of tablespoons in the lungs. watch it with that stuff, especially around the kids.