A 10-Year Study Finds Fruits and Vegetables May Help Keep Kidney Patients Out of the Hospital

Two treatments aimed at the same target, with ten years of follow-up, and only one was linked to fewer hospital trips. The trial involved adults with stage 3 chronic kidney disease who also had metabolic acidosis, a condition in which too much acid builds up in the body. One group was assigned fruits and vegetables, one took a standard kidney medication, and a third stayed on usual care.

The produce group is where the headline comes from. The medication result is the part worth a second look, because it leaves an obvious question hanging: why would two approaches built to lower dietary acid by the same amount end up so far apart?

The findings were announced October 22 at the American Society of Nephrology’s Kidney Week, which runs through October 25. They arrive with enough gaps that the fine print matters as much as the headline.

The Hospital Numbers Were Hard to Ignore

By the end of follow-up, the fruit-and-vegetable group had far fewer hospital events than the usual-care group.

In the American Society of Nephrology’s release, the produce group logged 14 hospitalizations, compared with 64 in the usual-care group. Emergency department visits told a similar story, at 20 versus 88. Those are counts of events rather than people, so one patient could account for more than one.

Dialysis is counted differently. Four patients in the produce group needed it, compared with 16 in usual care, and that figure counts patients.

How Food Could Lower Acid in the Body

The trial rests on a simple idea: when kidneys struggle, acid builds up, and food might help bring it down.

Damaged kidneys cannot remove acid effectively, which is the problem the trial set out to address.

The standard treatment is oral sodium bicarbonate, essentially baking soda. Base-producing fruits and vegetables offer another route because they can help neutralize acid through metabolism-related substances.

Researchers randomly assigned 108 patients to three groups of 36 and followed them annually. Both active treatments were meant to cut dietary acid by half.

Related: 6 Fruits That Naturally Boost Liver and Kidney Detox

The Medication Result Is the Real Puzzle

Sodium bicarbonate, the standard treatment, did not differ from usual care on these outcomes.

The report includes no p-values, confidence intervals, or effect estimates, so it’s impossible to assess the strength of the comparison.

Corresponding author Nimrit Goraya, MD, of Baylor Scott and White Health says the produce approach was linked to better long-term outcomes than either sodium bicarbonate or usual care. The release lacks a direct statistical test of produce against the drug, so headlines claiming fruits and vegetables beat medication go beyond the numbers.

The results also leave out acid levels, kidney-function measurements, and whether either group reached its acid target. Those figures might help explain the gap.

What the Study Can’t Tell You Yet

The trial was small, and the way it was analyzed carries a label worth knowing.

The groups were modest in size, which limits how far any one result can stretch. The study’s title also calls it a post hoc analysis, a label that usually means researchers asked the question after the trial was designed. Which outcomes were planned is not specified.

The diet itself remains unclear. It is unclear which fruits and vegetables were used, how much patients ate, whether the produce was supplied or only recommended, and what usual care involved. Participants’ ages, other health conditions, and funding details are missing too.

Before Anyone Changes a Treatment Plan

These findings don’t tell patients to drop a medication or overhaul a diet on their own.

People with kidney disease may need to limit potassium and other nutrients, so they should discuss substantial diet changes with a health professional first. The results include no potassium measurements or side-effect rates.

As for what comes next, no guideline revision, treatment approval, or follow-up trial has been announced. Goraya says the findings support testing dietary approaches in kidney disease at the population level and for individual patients, and she believes the cumulative clinical and economic benefits could be substantial.

If you or someone close to you manages kidney disease, what has your care team said about diet and potassium?

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