For centuries, the ubiquitous mineral salt has had economic, political, health, and religious importance, and has been a subject in mythology, literature, and warfare. At one time used as currency, a symbol of good luck, and to ward off evil spirits, salt’s most identifiable role today is that of flavor enhancer and food preserver. It is a supermarket staple and something we find in every home cook’s cupboard and on every restaurant table. The usefulness of salt goes beyond the kitchen; it serve…