Probiotics reduce infection rates and inflammatory markers in patients with colorectal cancerProbiotics may lower infection risks for colorectal cancer patients

Frontiers in Medicine Published November 5, 2026 DOI ↗ Editorial oversight: Dr. Amelia Tan, PhD · Internal Medicine & Chronic Disease

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Key Takeaway

Consider probiotics to reduce inflammatory markers and the incidence of postoperative infections in colorectal cancer.

This meta-analysis evaluates the impact of probiotics on patients with colorectal cancer. The analysis synthesized data regarding inflammatory markers, white blood cell counts, and various postoperative complications to determine the efficacy of probiotic intervention.

Key findings include a significant reduction in interleukin-6 (MD: -7.52; 95% CI: -14.18 to -0.86; P = 0.03) and white blood cell count (MD: -1.18; 95% CI: -1.90 to -0.46; P = 0.001). Furthermore, the meta-analysis reported lower incidences of pneumonia (OR: 0.41; 95% CI: 0.25 to 0.68; P = 0.0005), urinary tract infection (OR: 0.40; 95% CI: 0.18 to 0.88; P = 0.02), surgical site infection (OR: 0.54; 95% CI: 0.39 to 0.74; P = 0.0002), bacteremia (OR: 0.37; 95% CI: 0.16 to 0.86; P = 0.02), and septicemia (OR: 0.27; 95% CI: 0.13 to 0.57; P = 0.0007). Additionally, the duration of postoperative pyrexia was shortened (MD: -0.89; 95% CI: -1.32 to -0.47). No significant change was observed for C-reactive protein.

While the meta-analysis suggests a protective effect against infections, specific limitations and safety data were not reported. Clinical application should be weighed against the lack of reported safety data and the specific context of the patient's postoperative care.

How this fits prior evidence

This meta-analysis addresses a gap in managing postoperative complications in colorectal cancer. While prior evidence notes that gut microbial metabolites influence neuroinflammation, this study focuses on the direct impact of probiotics on systemic inflammatory markers like interleukin-6 and white blood cell counts. It also provides data on infection rates, which is a distinct clinical focus from the previously noted impacts of exercise on fitness or the role of EGFR inhibitors in CRLM.

Dealing with colorectal cancer involves more than just fighting the cancer itself. Patients often face the heavy burden of potential complications, such as severe infections, during their treatment journey. New data suggests that probiotics might play a role in managing these risks.

Researchers looked at data from several clinical trials and found that patients taking probiotics had lower rates of several serious infections. This included a lower incidence of pneumonia, urinary tract infections, and surgical site infections. The study also showed lower rates of bacteremia and septicemia, which are serious blood infections. Additionally, patients taking probiotics had shorter periods of fever after surgery.

While the results are promising, it is important to remember that these findings come from a meta-analysis of existing trials. The data showed a decrease in certain markers of inflammation, like interleukin-6 and white blood cell counts, but did not show a significant change in C-reactive protein. Talk to your doctor to see if probiotics are a right fit for your specific care plan.

What this means for you:

Probiotics may reduce the risk of serious infections and shorten fever duration for colorectal cancer patients.

Common questions

Can probiotics help prevent infections after surgery?

The data shows that patients taking probiotics had a lower incidence of surgical site infections and shorter periods of fever after surgery. It also showed lower rates of serious conditions like bacteremia and septicemia.

What specific infections were less common with probiotics?

Patients taking probiotics showed a lower incidence of pneumonia, urinary tract infections, and surgical site infections. The study also reported lower rates of bacteremia and septicemia.

Does this mean probiotics are a guaranteed treatment?

While the study shows a link between probiotics and lower infection rates, it is a meta-analysis of trials rather than a guarantee. You should always consult your doctor to discuss how probiotics fit into your specific treatment plan.

Study Details

Study typeMeta analysis

EvidenceLevel 1

PublishedNov 2026

View Original Abstract ↓

BackgroundPerioperative probiotics for CRC surgery may modulate gut microbiota, yet evidence for inflammation, complications is inconsistent. We systematically assessed these outcomes.MethodsFollowing PRISMA guidelines, we searched PubMed, Embase, Cochrane Library, and Web of Science for randomized controlled trials (RCTs). A random‐effects model was applied.ResultsProbiotics reduced interleukin‐6 (MD: −7.52, 95% CI: −14.18 to −0.86; P = 0.03) and white blood cell count (MD: −1.18, 95% CI: −1.90 to −0.46; P = 0.001), but not C‐reactive protein. Incidence of infectious complications lowered: pneumonia (OR: 0.41, 95% CI: 0.25 to 0.68; P = 0.0005), urinary tract infection (OR: 0.40, 95% CI: 0.18 to 0.88; P = 0.02), surgical site infection (OR: 0.54, 95% CI: 0.39 to 0.74; P = 0.0002), bacteremia (OR: 0.37, 95% CI: 0.16 to 0.86; P = 0.02), and septicemia (OR: 0.27, 95% CI: 0.13 to 0.57; P = 0.0007). Probiotics also shortened postoperative pyrexia duration (MD: −0.89, 95% CI: −1.32 to −0.47; P

Probiotics reduce infection rates and inflammatory markers in patients with colorectal cancerProbiotics may lower infection risks for colorectal cancer patients

How this fits prior evidence

Common questions

Study Details

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Probiotics reduce infection rates and inflammatory markers in patients with colorectal cancerProbiotics may lower infection risks for colorectal cancer patients

How this fits prior evidence

Common questions

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