What is iodine used for?

Hello friends - I would very much appreciate having a clue as to what people are taking Iodine for - Is it to cure one or more diseases? or to use as a supplement for thyroid problems or something? Sorry to show my ignorance but I would like to know because I hear people talking about it on a lot of the forums. They already know about it - to me it is like greek.

Thanks for any assistance.

I want to find out if it is something I want to try.

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