Do you know how much sodium is in the foods you eat? Most of the sodium in a typical diet comes from processed and prepared foods, such as canned vegetables, soups, deli meats and frozen foods. Another major source of sodium is condiments. One tablespoon of soy sauce, for example, has a whopping 1,000 milligrams of sodium. To scale back the sodium in your diet, eat more fresh foods and fewer processed foods.