Tomatoes are considered to be a really high serving of potassium, which is not suitable for men and women with weak kidneys. Unfortunately, tomatoes are used in almost all the dishes and this makes eating normally hard for those who may be going through dialysis treatment. For these people, everyday foods like ketchup become a no-no.
Finding a substitute that is equally good in taste but low in salt content may be the key. Keeping your taste preferences in mind, using red pepper sauce instead of tomato sauce may help keep the taste similar and reduce the amount of potassium in your diet significantly.