Washington, July 27 - Uncooked meat products with food additives may contain high levels of phosphorus and potassium that find no place in food labels. This can make it difficult for people to limit these minerals that at high levels are harmful to kidney disease patients, according to a new study.

Dialysis patients must watch their intake of phosphate so that their blood phosphate levels do not rise, which may then cause premature death.

Kidney disease patients also must limit their intake of potassium, because high blood potassium levels can cause sudden death.

One growing source of dietary phosphorus and potassium is through 'enhanced' fresh meat and poultry products. These foods are injected with a solution of water with sodium and potassium salts (particularly phosphates) as well as anti-oxidants and flavourings.

While ingesting phosphates and potassium can be dangerous for dialysis patients, there is no requirement that these ingredients be included in nutrition labels.