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Kidney Patients May Gain From Less Salt

Kidney Patients May Gain From Less Salt

11/07/13

THURSDAY, Nov. 7 (HealthDay News) -- Reducing salt consumption improves the heart and kidney health of people with chronic kidney disease, according to a small new study.

The findings suggest that restricting salt intake may help prolong kidney disease patients' lives, according to the Australian researchers.

The study included 20 people with chronic kidney disease who consumed a high-salt diet (180 to 200 millimoles a day) for two weeks and a low-salt diet (60 to 80 mmol/day) for two weeks.

Dietary guidelines recommend limiting daily sodium intake to less than 100 mmol, which comes to 2,300 milligrams, or one teaspoon.

In the study, low salt intake reduced excess body fluid outside of the cells by 1 liter, on average. It also lowered blood pressure by 10/4 millimeters of mercury (mm Hg), and cut protein excretion in the urine by half, without causing significant side effects.

The study is scheduled for publication in the Journal of the American Society of Nephrology.

"These are clinically significant findings, with this magnitude of blood pressure reduction being comparable to that expected with the addition of [a blood-pressure lowering] medication and larger than effects usually seen with sodium restriction in people without chronic kidney disease," Emma McMahon said in a news release from the American Society of Nephrology. She is a doctoral candidate at the University of Queensland.

The 50 percent reduction in protein excretion in the urine was particularly impressive, according to McMahon.

"If maintained long-term, this could reduce risk of progression to end-stage kidney disease -- where dialysis or transplant is required to survive -- by 30 percent," she said.

The findings suggest that salt restriction is an inexpensive, low-risk and effective way to reduce heart and kidney risk in patients with chronic kidney disease, according to the news release.

Authors of an accompanying journal editorial noted that larger studies with longer follow-up periods are needed to confirm the new findings.

More information

The National Kidney Foundation has more about chronic kidney disease.

Copyright © 2013 HealthDay. All rights reserved.

Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.

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