Dude if you are worried about whether you have enough in your body paint it on your neck by your thyroid and see if it absorbs, if not your not it's all good.
I have had Iodine literally absorb in zero seconds when I was very deficient at various times...my husband who consumes lots of table salt ..he takes in zero io when I've experimented on him..his body just shakes it off like a tattoo sitting there.