The link between diet and how you feel
Various waste products can build up in your blood. Each kind can have different effects on your health.
Salt
Salt (Sodium chloride) can increase blood pressure,so you may be encouraged to reduce salt intake. (Salt also has the effect of increasing thirst, so it makes it more difficult for patients to restrict their fluid intake).
Potassium
Potassium is a mineral which is found in the cells of body tissue, and any excess would normally be removed by the kidneys. Too high a level of potassium is bad for the heart - in extreme case it may even cause it to stop.
Phosphate
Phosphate is a substance that is widely found in foods. It works very closely with the mineral calcium, and the healthy body keeps these two substances in balance. High phosphate levels may be associated with itch and over the longterm can damage blood vessels.
Protein
This is an essential nutrient that enables the body to build muscles. Low levels of protein can lead to fluid retention and to a reduction of the body's ability to fight off infections.
Vitamins
Some patients may need vitamin B and C supplements.
Iron
Iron levels may drop and cause anaemia, this can be replaced with iron tablets but more often with intravenous iron given.