What's the deal with non-iodized salt?

That’s the fish poop and remains of rotted sea creatures you are tasting. Yum. Perhaps your tastes in food are more sophisticated than you think?

You really should try a blind taste test someday.

Because salt was the traditional delivery mechanism. It is only when you strip all the minirals out, to make it really white, that the iodine falls to low levels. (our culture really likes really white salt, and flour, and cruise ships),

In the 20th centtury, wheat and milk also became trace sources of iodine, so there were a lot of people who got some iodine by other means.

Iodine was used on cow teats after milking, and on wheat before planting.