Himalayan salt is pink because it has iron oxide in it. Iodized salt was invented because the medical community wanted to thwart the growing problem of goiters in Americans.
I’m torn, but I do understand the need for iodine for the thyroid. I don’t need to add any more rust by way of salt I usually get plain salt, or sometimes sea salt or kosher salt whatever that is, but I’m pretty sure it’s mined.
I think seafood and dairy are good sources of iodine. Because salt without iodine tastes better, I would prefer to take a supplement if I needed more iodine.