Soup
Canned, packaged and restaurant-prepared soups often pack a lot of sodium, though you can find reduced-sodium options for some canned varieties. The sodium primarily comes from salt, though some soups also contain sodium-rich flavor additives, such as monosodium glutamate (MSG). On average, canned soup has 700 mg of sodium, or 30% of the RDI, per 1-cup (245-gram) serving.