Pickled foods, relishes, and olives can all contain a shocking amount of sodium. Too much sodium in the diet makes the kidneys work harder to process, which may cause more kidney damage and reduced function. Pickled cucumbers can have 300 milligrams of salt in even a tiny portion. Olives, for instance, are frequently treated with sodium to increase flavour and minimize a bitter taste, so just a few could account for a sizable amount of a person's recommended daily intake of sodium. Even while low-sodium pickles and relishes are widely available, they might still have high potassium and salt content, so it's best to limit how often you consume them.