A 2021 Cochrane review of controlled trials in people with chronic kidney disease at any stage, including those on dialysis, found high-certainty evidence that reduced salt intake may help to lower both systolic and diastolic blood pressure, as well as albuminuria.
The effect of salt restriction on extracellular fluid, oedema, and total body weight reduction was also uncertain.
[12] Salt restriction paradoxically caused a significant increase in blood pressure in a substantial subgroup (younger individuals with normotension or prehypertension).
Milk, beets, and celery also naturally contain sodium, as does drinking water, although the amount varies depending on the source.
Processed meats, such as bacon, sausage, and ham, and canned soups and vegetables are all examples of foods that contain added sodium.
[14] Also, processed foods such as potato chips, frozen dinners and cured meats have high sodium content.