Dietary Sodium Management in Chronic Kidney Disease
Summary
Dietary sodium exerts a central role in the progression of chronic kidney disease (CKD) and its cardiovascular complications. Excessive sodium intake promotes hypertension, fluid retention and glomerular hyperfiltration, accelerating nephron loss and proteinuria. Guidelines typically recommend limiting sodium to around 2 g per day (equivalent to 5 g of salt), although individual targets should account for CKD stage, comorbid conditions and nutritional status. Effective management relies on accurate assessment of sodium intake via 24-hour urinary sodium excretion, alongside patient education and behavioural support to enhance adherence. Socioeconomic factors, cultural dietary patterns and variability in processed-food sodium content pose challenges to consistent restriction. Integration of dietary measures with pharmacological interventions—such as judicious use of diuretics and renin-angiotensin system blockade—can mitigate intraglomerular pressure, reduce proteinuria and offer cardioprotective benefits. Emerging strategies encompass digital self-monitoring tools, personalised counselling and collaboration with the food industry to achieve broader population-level sodium reduction.
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Dietary Sodium Management in Chronic Kidney Disease publication trend
The graph below shows the total number of articles in dietary sodium management in chronic kidney disease across all publications each year (not limited to Nature Index journals).
Technical terms
eGFR (estimated glomerular filtration rate): A calculated measure of kidney filtration function based on serum creatinine, age, sex and body size.
Proteinuria: Excretion of abnormal amounts of protein in the urine, indicative of glomerular injury.
ECW/TBW ratio (extracellular water to total body water): A measure of fluid distribution used to assess volume overload.
Left ventricular hypertrophy (LVH): Thickening of the left ventricle muscle wall due to increased pressure or volume load.
Dietary sodium intake: Daily amount of sodium consumed, typically estimated by urinary sodium excretion.
References
- High sodium intake and fluid overhydration predict cardiac structural and functional impairments in chronic kidney disease. Frontiers in Nutrition (2024).
- Dietary Salt Restriction in Chronic Kidney Disease: A Meta-Analysis of Randomized Clinical Trials. Nutrients (2018).
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