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H. pylori eradication linked to lower proteinuria and reduced CKD risk in meta-analysisTreating a common stomach bacteria may help manage kidney disease

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Key Takeaway
Consider H. pylori as a possible modifiable factor in proteinuric kidney disease, but causality is unproven.

This meta-analysis synthesized evidence on the association between Helicobacter pylori eradication and kidney outcomes in patients with kidney disease or proteinuria. The review focused on changes in proteinuria/albuminuria as the primary outcome and incident chronic kidney disease (CKD) as a secondary outcome.

For proteinuria/albuminuria, H. pylori eradication was associated with a significant reduction, with a standardized mean difference (SMD) of -1.14 (95% CI -1.65 to -0.62; P <.001). For incident CKD, earlier eradication was associated with a lower risk (HR 0.68; 95% CI 0.52-0.88).

The authors note substantial heterogeneity (I2 = 91.5%) and state that causality remains unproven. Safety data, including adverse events and discontinuations, were not reported. Funding sources and conflicts of interest were also not reported.

The findings suggest that H. pylori infection might represent a modifiable factor in proteinuric kidney disease, and eradication may be associated with lower proteinuria and reduced renal risk. However, given the observational nature of the included evidence and high heterogeneity, these results should be interpreted cautiously and do not establish a causal relationship.

Living with kidney disease often means managing high levels of protein in the urine, a condition known as proteinuria. This can put a lot of stress on the kidneys over time. New research suggests that a common stomach infection, called H. pylori, might play a role in this process.

Researchers looked at data and found that clearing this specific bacteria from the body led to a significant reduction in protein levels in the urine. Additionally, patients who had the infection cleared earlier showed a lower risk of developing chronic kidney disease. This suggests that the infection might be a factor that doctors can address to help protect kidney health.

While these results are promising, the evidence is still early. Because the studies looked at very different groups of people, it is not yet proven that the treatment definitely causes these improvements. However, it highlights a possible new way to manage kidney health by addressing a common infection.

What this means for you:
Treating H. pylori infections may lower protein in the urine and reduce the risk of chronic kidney disease.

Common questions

What is H. pylori and how does it affect the kidneys?

H. pylori is a common bacteria that infects the stomach. This study found that people with this infection and kidney disease saw a significant reduction in proteinuria, which is the presence of protein in the urine, after the bacteria were cleared.

Can treating this stomach infection help prevent kidney disease?

The data showed that patients who had the H. pylori infection cleared earlier had a lower risk of developing chronic kidney disease. This suggests that treating the infection early could be a way to manage risks for those with kidney issues.

Is it certain that treating H. pylori causes these improvements?

While the results show a significant reduction in protein levels, the study notes that causality is not yet proven. This is because the data came from many different types of studies, making it hard to say for certain how much the treatment alone caused the change.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedOct 2026
View Original Abstract ↓
BACKGROUND: Helicobacter pylori infection has been implicated in systemic inflammation, but its role in kidney disease remains uncertain. We aimed to evaluate whether H. pylori eradication is associated with improved renal outcomes. METHODS: We systematically reviewed studies of H. pylori eradication in patients with kidney disease or proteinuria. PubMed, Embase, Web of Science, Cochrane Library, and CNKI were searched up to March 2026. The primary outcome was change in proteinuria/albuminuria; secondary outcomes included incident chronic kidney disease (CKD). Random-effects models calculated standardized mean differences (SMDs), odds ratios (ORs), and hazard ratios (HRs) with 95% confidence intervals (CIs). RESULTS: Sixteen studies were included. Thirteen studies provided 14 datasets for proteinuria/albuminuria (one study contributed two comparisons). H. pylori eradication was associated with a significant reduction in proteinuria/albuminuria (SMD -1.14, 95% CI -1.65 to -0.62; P < .001), with substantial heterogeneity (I2 = 91.5%). A numerically larger effect was seen in randomized trials than in non-randomized studies. Observational data indicated that earlier eradication was associated with a lower risk of incident CKD (HR 0.68, 95% CI 0.52-0.88). CONCLUSION: H. pylori eradication is associated with lower proteinuria and may reduce renal risk. H. pylori infection might represent a modifiable factor in proteinuric kidney disease. However, given the heterogeneity and limitations of the evidence, causality remains unproven, and further well-designed randomized trials are required.
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