What Is Salt? Salt is a seasoning that can flavor food and act as a preservative. It’s about 60% chloride and about 40% sodium. Nearly all unprocessed foods -- think veggies, fruits, nuts, meats, whole grains, and dairy foods -- are low in sodium. The salt that we do eat helps relax and contract muscles, lends a hand with nerve impulses, and balances the minerals and water we take in. How Much Salt Do You Need? Our body needs only a small amount of sodium. We should get about 1,500 milligrams of it every day. But the average American takes...