You might be interested in reading the Iodine support forum. I have not seen peeling lips mentioned there, but you might find info about supplemententing iodine, since you also need selenium and vitamin C (sodium ascorbate).
The forum is only 3 months old so people are mainly experimenting but in the R posts you can find a lot of info.

lipdisorder, there are tons of things that can cause dry peeling lips. I'm happy if you've found your cause (if you have), but it makes absolutely no sense to tell everyone here they have hypothyroidism just because it can cause dry peeling lips. Besides, if you think you have an underactive thyroid the doctor can test for that.

i have had peeling lips for a little over a year.
about a month ago i went to the doctor to try to figure out why I was losing hair, and he did a thyroid test and it came out fine.
so, this might be the cause for some people, but i definitely have exfoliative chelitis and my thyroid levels are fine.

I've had many thyroid tests done and they all came back fine. If we had thyroid problems there would be many other symptoms.

Hi! Wanted to tell you that I have been on Nature-throid for 2 weeks. All my tyriod labs have been normal, with the exception of an elevating TSH over the course of 3 years. Still considered to be in range though--at least in the conventional medical world. My alternative Dr. wants to see it under 2.0. Anyway, I have had chapped and peeling lips for the last 3-4 years. Same with my feet. Well now that is all gone! My lips are so soft and smooth and my feet are becoming that way again too. I am on 1/2 grain daily. Hope you get some relief as well!