I posted a few weeks back that I apply it topically, it was an experiment as Grizz said it helps with dandruff.
I noticed my shedding decreased while taking it internally, but got way better when I actually applied it topically. I only do it twice a week or so.
I put 5-6 drops in less than an ounce of water and dropper it around my scalp. Sometimes right before a shower, other times I let it absorb completely without rinsing it.
my hypothesis is based on my observations. When I was on Lamisil for a toenail infection, it killed any fungus/bacteria i had in my skin. During that time, I had some really good regrowth (barely any shedding at least), thickest hair I had in years. When I stopped, the shedding of 40-50 hairs in the drain catch resumed.
By that same hypothesis, i assume the Iodine
kills any fungus, (possibly dht??) that may be causing the loss. Hence good regrowth.