Sn instructed that reducing sodium intake lowers blood pressure and prevent the collection of fluid in the lower legs or abdomen. People with chronic kidney disease must control sodium intake to prevent volume overload, which increases blood pressure and causes swelling. Food to eat any fresh or frozen beef, lamb, pork, poultry and fish. Eggs and egg substitutes. Low-sodium peanut butter. Dry peas and beans (not canned) drained, water or oil packed canned fish or poultry foods to avoid canned food canned vegetables processed meats salted snacks such as, salted peanuts, salted almonds etc.