I might have, and if I did, there was nothing there (not sure if it appears with TLC but it should with LC-MS), but I can`t remember to be honest, since I use non-iodized salt and it`s been a long time since I used iodized salt.
What form is iodine in salt? How much of it is there? What extraction are you talking about, harmalas or dmt or mescaline ? What solvents or chemicals are being used?
Maybe we can work it out through logic and chemical knowledge whether there`s any issues there.