A lot of people start with trans-dermal application for several of reasons. Some apply it directly to issue areas to help that area of the body absorb more iodine, whether also consuming it internally, or not. Some people don’t even have specific areas to target with iodine, they just apply it to their skin til they are ready to consume it.
Other recommended nutrients
When we consume iodine, apply it to our skin, or nebulize it, its commonly recommended to have several other nutrients available to our cells. These extra nutrients recommended in The Iodine Protocol help our body process some of the new things iodine is about to allow our body to do.
Using Lugols on the skin
Lower strength Lugols can be applied directly to the skin but some people may have irritation if they do not dilute it enough. I do fine with a few drops of 2% directly on my skin. I can handle a few drops of 5% on my forearm where my skin is a little tougher, anywhere else will start itching from 5% though.
Lugols is pretty dark, and stains the skin with an orange/dark brown color for anywhere from a few hours to a day or so. If we’ve stained something with Lugols by mistake, vitamin C can sometimes help ‘bleach’ the iodine.
More about Lugols at whyiodine.com/lugols
Using SSKI on the skin
SSKI is clear/yellowish and contains only potassium iodide. Our body is able to use some of this and convert it to iodine but most people recommend Lugols so we get both forms. SSKI is usually much more potent than Lugols, so even a single drop spread out can still have a strong reaction if we are just introducing ourselves to iodine.
More about SSKI at whyiodine.com/sski
Absorption rate of skin vs ingestion
We absorb iodine pretty well via our skin, but the process is slow and iodine likes to evaporate at room temperature, so the extra temperature of our body heat causes it to turn into a gas much quicker. By the time our body has a chance to absorb the liquid, more than half of it has most likely interacted with the environment. When we apply iodine to our skin, the tissue in that area absorbs and holds it. This is why most of it will end up being gassed off, or evaporated by the time the rest of our body absorbs it.
Absorbing iodine with our skin may help us increase our levels. But it would take a lot more iodine, and a large area of skin covered in order to absorb the same about as ingesting.
Some technical information about The Bioavailability of Iodine Applied to the Skin by Guy E. Abraham, MD https://www.optimox.com/iodine-study-20