Lugol's iodine is usually not recommended because a single drop has dozens of times the daily recommended dose of iodine. That can cause bad side effects (as discussed in the article)
It's a shame because the remaining 98% could get a lot of benefit and (setting aside the above) iodine is supposed to be the least toxic pure element. In the past Lugol's iodine was used as an antiseptic to put on cuts so I guess a fair amount got absorbed that way.