If this raises your body temperature you could expect better weight control. Herbalists made a point of discouraging use of plain iodine. Fucus, they said, was much more effective. If all these measures don't work for you, at least you have improved your health trying. There are some advantages of being overweight.
Overweight people seem to weather illness better.
They laugh more. But one look in the mirror or at the scales ruins it. Put away the long mirror and scales. Don't ruin your whole life over it. Make a reasonable effort and then let go.