Smoked or canned meat and fish products such as tuna, ham, bacon, cold cuts, corned beef and sausage are well seasoned with salt. Deli roast beef and turkey breast are often cooked with salt. Nearly all foods contain some natural sodium. A few foods may be limited on a medically prescribed diet because of their relatively high levels of natural sodium. As a rule, however, the amount of sodium contained in unseasoned, non-processed foods is low.
Sodium is a part of many other ingredients added to prepare foods that often have no salty taste.
Some are used in amounts that add a significant amount of sodium to the final product. Others are used in such small amounts they add almost no sodium and are not of concern. For example, just two Alka Seltzer tablets contain 1064mg of sodium. If a nutrition label is not available, you can check the ingredient statement for the presence of salt or other sodium compounds. Ingredients are listed in descending order by weight, but since the specific weights aren't listed, it only gives you a rough idea of the amount of sodium.