Eating a predominantly plant-based diet may significantly lower the risk of death in people with chronic kidney disease (CKD), according to new research presented at the 63rd European Renal Association Congress. A multicohort analysis of more than 8,000 adults with CKD found that adherence to plant-forward dietary patterns was associated with substantially better long-term survival outcomes compared to diets heavy in red meat and ultra-processed foods.

What Dietary Pattern Works Best for Kidney Disease?

Researchers examined four different eating approaches to determine which offered the most protection for people with CKD, a condition where the kidneys lose their ability to filter waste effectively. The study compared the Dietary Approaches to Stop Hypertension (DASH) diet, the Mediterranean diet, the Planetary Health Diet (PHD), and the Inverted Pyramid Diet. Among these, the Planetary Health Diet demonstrated the strongest protective effect.

The Planetary Health Diet emphasizes plant-based foods while limiting animal products and ultra-processed items. Each standard deviation increase in adherence to this diet was associated with a 17% reduction in overall mortality risk. More importantly for kidney disease patients, the diet reduced kidney-related mortality risk by 24%, meaning participants had substantially better chances of surviving longer.

The DASH and Mediterranean diets also showed benefits, though the protective effects were less pronounced than the Planetary Health Diet. In stark contrast, the Inverted Pyramid Diet, which emphasizes animal products and processed foods, was linked to worse outcomes. People following this pattern experienced an 18% higher risk of death from any cause and a 32% higher risk of kidney-related death.

Which Foods Should Kidney Disease Patients Avoid?

The research identified specific dietary components that significantly worsened outcomes for people with kidney disease. Understanding what to limit is just as important as knowing what to eat more of. The study tracked over 8,000 adults with CKD from national health surveys over a follow-up period of approximately 7 to 8 years, during which 2,847 deaths occurred, including 312 kidney-related deaths.

• Ultra-Processed Foods: When ultra-processed foods made up at least 30% of total daily calories, mortality risk increased by 24%, suggesting that even moderate consumption of highly processed items can meaningfully impact survival in kidney disease patients.
• Red Meat Consumption: Eating four or more servings of red meat per week was associated with a 19% increase in mortality risk, indicating that frequent red meat intake poses a significant threat to kidney disease outcomes.
• Processed and Refined Products: Foods high in sodium, added sugars, and artificial ingredients were linked to poorer kidney function and higher death rates across the study population.

How to Shift Toward a Kidney-Protective Diet

• Prioritize Whole Plant Foods: Base meals around vegetables, fruits, whole grains, legumes, nuts, and seeds rather than animal products, which aligns with the Planetary Health Diet approach shown to reduce mortality by 24% in kidney disease patients.
• Limit Red Meat to Occasional Consumption: Instead of eating red meat four or more times weekly, reserve it for special occasions and choose fish, poultry, or plant-based proteins on most days to reduce mortality risk by nearly 20%.
• Minimize Ultra-Processed Foods: Keep processed foods, fast food, packaged snacks, and sugary beverages to less than 30% of your daily calorie intake to avoid the 24% increase in death risk associated with higher consumption.
• Choose Minimally Processed Options: Select foods in their natural state or with minimal processing, such as fresh produce, dried beans, nuts, and whole grains, rather than packaged alternatives.

The findings underscore that dietary quality plays a critical role in managing chronic kidney disease and improving long-term survival. For the estimated millions of people living with CKD, these results offer a practical, evidence-based strategy that does not require medication or expensive interventions. Instead, shifting eating patterns toward plant-forward, minimally processed foods may offer meaningful protection against the serious complications of kidney disease.

The research was conducted using data from the National Health and Nutrition Examination Survey (NHANES) and the Health Care and Nutrition Study (HCNS), ensuring that findings reflect real-world eating patterns and outcomes across diverse populations. CKD was defined as an estimated glomerular filtration rate (eGFR), a measure of kidney function, below 60 milliliters per minute per 1.73 square meters of body surface area, or the presence of albuminuria, which is protein in the urine.

For people with kidney disease, these dietary recommendations offer hope that everyday food choices can meaningfully influence health outcomes. While kidney disease remains a serious condition requiring medical supervision, adopting a plant-forward eating pattern rich in whole foods and low in red meat and ultra-processed items represents an accessible step toward better long-term health.