Phytonutrient-enriched prebiotic mixture enhances probiotic effects: ex vivo screening and human clinical trial
Combining a phytonutrient-enriched prebiotic mixture with probiotics produced greater increases in butyrate and total SCFAs than either intervention alone, in both ex vivo and randomized clinical settings.
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What the study showed
Ex vivo analyses showed PEP components elevated acetate, butyrate, total SCFAs, and lactate, with fiber-rich fractions showing the strongest effects. Co-treatment with probiotics further amplified these metabolites in a dose-dependent manner. In the clinical trial, the combined PEP plus probiotic group showed the greatest increases in butyrate (~6 µmol/g) and total SCFAs (22.9 µmol/g) compared to single-intervention groups.
How it was done
Three-phase design: ex vivo evaluation of individual PEP components, ex vivo co-administration with probiotics, and a randomized clinical study with three arms (PEP-only, probiotic-only, combined PEP plus probiotic) measuring fecal metabolites.
Risk of bias
The abstract does not report sample size, trial duration, inclusion/exclusion criteria, or blinding procedures. The study is a preprint without confirmed peer review, substantially limiting confidence in the findings.
What this study does NOT prove
Increased fecal SCFAs from the PEP plus probiotic combination cannot be taken as proof of measurable clinical health benefits.
In clinical practice
Data are preliminary and from an unreviewed preprint. There is insufficient evidence to modify clinical practice based on this abstract alone.
Limitations
The abstract does not report sample size, trial duration, inclusion/exclusion criteria, or blinding procedures. The study is a preprint without confirmed peer review, substantially limiting confidence in the findings.
Technical appendix
Version history
- 1.0 · 2026-07-29 — Auto-generated under Evidence Standard v1.0
Paid access: structured summary from public metadata; consult the original study at the source.