Canned soup and ham are known to be loaded with sodium, which damages your stomach lining and runs your risk of ulcers, or in severe cases, stomach cancer. Think about these numbers when you go easy on a ham sandwich or canned soup: that's over 1,100 milligrams of sodium per sandwich, and 700 milligrams per can of soup. Take more time for healthier alternatives like a more balanced sandwich or homemade tomato soup instead.