Kosher salt, like all salt, is NaCl—sodium ions electrostatically bound with chloride ions and arranged in a crystal ...

It undergoes extensive processing, which removes most natural minerals, leaving behind almost pure sodium chloride. Table salt is often fortified with iodine, an essential nutrient that helps ...

On its own, pure salt is a food that never actually ... still have a best-by date due to the presence of additives. Iodized salt, for example, has a designated shelf life of around five years ...