Multi-strain probiotic combination reduces gut permeability, oxidative stress, and inflammation in undernourished adults: randomized controlled trial
In undernourished adults receiving a hypercaloric dietary intervention, supplementation with L. acidophilus, L. casei, and L. rhamnosus GG for 8 weeks showed a favorable direction of effect on zonulin, inflammatory, and oxidative stress markers compared to placebo — but no quantitative outcome data were available in the provided text.
| Outcome | Grade | Direction | Effect | Studies |
|---|---|---|---|---|
| Gut permeability (serum zonulin) | C | — Insufficient | Not reported in provided text | 1 |
| Oxidative stress markers | C | — Insufficient | Not reported in provided text | 1 |
| Inflammatory markers | C | — Insufficient | Not reported in provided text | 1 |
Context
Undernutrition impairs intestinal barrier integrity through dysbiosis and tight junction protein disruption, fueling systemic inflammation and hindering nutritional recovery. Multi-strain probiotics are biologically plausible interventions, yet evidence specific to undernourished adults remains sparse. This trial addresses that gap, but the full text provided is truncated and contains no numerical results.
What the study showed
The full text provided consists exclusively of the Introduction and Methods (section 2.1) repeated across all three sections (Methods, Results, Discussion). No numerical outcome data — absolute values, relative changes, 95% CIs, effect sizes, or p-values — were present in the supplied material. The favorable direction stated in the title cannot be quantitatively verified from the provided text. The analysis below is limited to what the protocol describes.
How it was done
Double-blind, randomized, placebo-controlled trial, 8-week duration, conducted at the Nutrition Specialty Clinic of Imam Reza Hospital, Mashhad, Iran (August 2024 – February 2025). Sample size and detailed inclusion/exclusion criteria are not available in the provided text. Ethical approval granted by Mashhad University of Medical Sciences Ethics Committee.
Effect magnitude
Not calculable: no effect size, 95% CI, or absolute/relative data were present in the provided text. Any quantitative statement would be speculative.
Limitations
The supplied text is truncated — Results and Discussion sections contain only the repetition of Introduction/Methods, with no outcome data. This prevents risk-of-bias assessment (RoB 2 not applicable without reported data). Inherent design limitations include: single-center sample, Iranian population (limited generalizability), combined intervention (diet + probiotic) preventing isolation of the probiotic effect alone, and 8-week duration precluding long-term effect assessment.
In clinical practice
With available data, no clinical recommendation can be derived from this study. Clinicians should not extrapolate from the title to practice without access to complete outcome data. The combination of hypercaloric diet plus multi-strain probiotic in undernourished adults remains an unconfirmed hypothesis.
What is still missing
Access to the complete text with outcome data (absolute values, 95% CIs, effect sizes). Multicenter studies with larger samples and post-intervention follow-up are needed to confirm efficacy and durability of effects.