Could Beetroot Juice Protect Kidneys During Pregnancy?

A small glass of deep-red juice might ease one of pregnancy’s hidden stresses. For pregnant women already living with chronic kidney disease (CKD), the body’s natural changes — higher blood volume, faster circulation, new hormonal demands — can turn routine pregnancy into a tightrope walk. Many standard kidney treatments are off-limits while carrying a baby, so clinicians and patients have few safe options. That’s why a team at King’s College London decided to test something simple: a daily serving of beetroot juice.

Beetroot is rich in dietary nitrate, which our bodies convert into nitric oxide — a molecule that helps relax blood vessels and improve blood flow. The idea is elegantly straightforward: better circulation could reduce the extra pressure pregnancy places on kidneys and the placenta. It’s practical, inexpensive and widely available. But does it work?

To find out, researchers enrolled 108 pregnant women with stage 2–5 CKD across eight hospitals in the UK. All participants were under 25 weeks’ gestation when they were randomly assigned to receive either standard obstetric and nephrology care or the same standard care plus a daily nitrate-containing beetroot juice supplement. The study, published in Kidney International Reports, was set up primarily to test whether a larger trial would be feasible. Yet the early signals surprised the team.

Women who received the beetroot supplement experienced roughly 70% fewer serious adverse events than those on standard care alone. That’s not a small margin. Around half of the serious events in the trial affected newborns, so the potential benefit touches both mothers and babies. Among participants with more advanced kidney disease, the researchers saw patterns that hint at clinically meaningful gains: better kidney function after pregnancy, fewer neonatal unit admissions, and a reduced need for blood pressure medication while pregnant.

Safety is the obvious question. Some clinicians and internet sources have warned that beetroot could raise potassium levels — a real concern for people with impaired kidney function. In this trial, the supplement was not associated with increased hyperkalemia or other identified safety problems. That’s reassuring, though not definitive; the trial was small and focused on feasibility as much as efficacy.

“Pregnancy forces difficult choices on women with chronic kidney disease,” said Professor Kate Bramham of King’s College London, the paper’s senior author. “These results are an encouraging first step toward a low-cost, low-risk intervention that could genuinely make a difference for a group of women who have been underserved by research.” Dr. Priscilla Smith, the study’s first author, noted that dietary nitrate appears to support blood-vessel function in a way that could relieve some of the kidney’s burden during pregnancy. Dr. Andrew Webb, a co-author, emphasized that these findings provide a foundation for more definitive trials.

Important caveats remain. The trial size was modest and not designed to provide definitive proof that beetroot juice prevents kidney decline or improves long-term outcomes. Observed differences might narrow or shift in larger, longer studies. Still, this work offers something rare: an inexpensive, non-pharmacological candidate for a clinical problem with very few safe interventions.

Should pregnant women with CKD start pouring beetroot juice right away? Not without talking to their nephrologist or obstetrician. Clinical guidance must follow larger, rigorously controlled trials and practical dosing recommendations. But the study opens a promising avenue: one where a natural dietary component could be repurposed to protect vulnerable mothers and their infants during a high-risk time.

If subsequent trials confirm these early findings, beetroot juice could become one of the simplest—and most unexpected—tools in the obstetric nephrology toolbox, turning a humble root vegetable into a potential ally for pregnancy and kidney health.