Iodized salt was introduced for this purpose - then we were warned to reduce salt intake...unintended consequence!
Is iodine added to any other food products?
Actually, reducing salt is also extremely bad advice but we need to consume unrefined natural salt; it emulates your blood due to all the minerals in it. Salt and potassium work in a ratio to each other so to offset salt you can up your potassium.
But most important is using the right salt. Salt does not cause hypertension; magnesium deficiency does.