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Salt: its role in chronic kidney disease
Stephan Thijssen1, Thomas M Kitzler, Nathan W Levin
1Renal Research Institute, New York, New York 10128, USA.
Summary
Dietary salt restriction is recommended for patients with chronic kidney disease (CKD). High salt intake poses risks beyond blood pressure, especially for CKD patients who differ significantly from the general population.
Area of Science:
- Nephrology
- Internal Medicine
Background:
- The role of dietary salt in health is controversial, with established links to hypertension.
- However, sodium intake affects more than just blood pressure and fluid balance.
Purpose of the Study:
- To review salt balance challenges in chronic kidney disease (CKD) patients.
- To summarize salt-mediated pathophysiology in CKD.
- To provide evidence-based recommendations for dietary salt intake in CKD.
Main Methods:
- Literature review focusing on salt balance and pathophysiology in CKD.
- Analysis of clinical trials and scientific knowledge regarding salt intake in CKD patients.
Main Results:
- CKD patients (especially at K/DOQI stage 5) present unique challenges in salt balance.
- High salt intake has detrimental effects in CKD independent of blood pressure.
- Current scientific understanding suggests significant risks of high salt diets for CKD.
Conclusions:
- Dietary salt intake requires careful management in CKD patients.
- Low dietary salt intake appears advisable for individuals with chronic kidney disease.
- Further research into salt's complex role in CKD pathophysiology is warranted.
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