Is Lugol's Corrosive for Stomach Lining?

Hello All:

I have read quite a few posts here with people taking anywhere from 2 to 30 drops a day. If one were to take 30 drops or more in one 8oz. water would it harm the esopahgus amd stomach lining?

Also 3 years ago when I took Iodine my urine was always brown, but now it is very clear and the frequency of urination has increased. WHY?

Thank you.
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