Earlier quoted context omitted.
I prefer course grained and no anti caking agents or iodine added. It's nothing special, some no-name Himalayan pink salt in a plastic grinder.
Well, iodine is required for life so you better get some elsewhere, like from a supplement. It's not present in sufficient amounts in water or plants these days...
According to the National Institutes of Health’s Office of Dietary Supplements, tests have shown that the population in the United States is “iodine sufficient.” Most Americans who eat a varied diet get enough iodine even if they don’t use iodized salt. They are at little risk of iodine deficiency*
https://www.nytimes.com/2017/07/21/well/eat/should-we-be-buy...