For many people, eating out is something they do to relax and socialize. You don’t have to give this up when you are on a low-sodium diet, but it is important to be more careful about what you order in a restaurant. Sodium isn’t just in table salt. You can also find it in sodium citrate, sodium bicarbonate (baking soda), and monosodium glutamate (MSG). Asian foods often have MSG as well as soy sauce, which is also high in sodium. But with some planning and helpful tips, you can still enjoy eating out while limiting the sodium in your diet.
Source: Low-Salt Diets: Eating Out