Processed store-bought and restaurant foods are the biggest source of sodium in the US diet because they typically have added salt to increase flavor and prolong shelf-life. Bread and rolls account for the most consumed sources of sodium. Other common sources include deli meats, pizza, poultry, and cheese. The US Department of Health and Human Services (HHS) and the US Department of Agriculture's (USDA's) 2010 dietary guidelines recommend a daily limit of about 2,300 milligrams of sodium, which is equivalent to approximately one teaspoon (4.93 ml) of table salt. It is estimated, however, that the average American consumes nearly 40% more than the recommendation.
More about Americans and sodium intake:
What about canned food sodium content? It's a lot
higher than bread and rolls' 130mg, as compared to 900 mg. to 1,000 mg. and higher.