Synergistic Effects of Polyphenols and Gut Microbiota-Derived Metabolites on Inflammation and Metabolic Syndrome: A Review.
Level 5 - mechanism / opinion, no new human data
Narrative review of mechanisms and interactions without systematic review methodology
PubMed 41622499 · doi:10.1002/mnfr.70360
What was done
This narrative review synthesized literature on the bidirectional interactions between dietary polyphenols and the gut microbiota, focusing on microbial transformation of polyphenols into bioactive metabolites and their combined regulatory effects on inflammatory signaling pathways and metabolic syndrome.
What was found
The abstract reports qualitative mechanistic conclusions without quantitative outcome data or statistical estimates. It notes that polyphenol-rich sources (such as tea, berries, grapes, and pomegranates) exert prebiotic-like effects by enriching beneficial commensal genera (e.g., Lactobacillus and Bifidobacterium) while decreasing harmful genera (such as Clostridium), and that polyphenol-derived metabolites attenuate pro-inflammatory cytokine production, modulate intracellular signaling, and reduce oxidative stress.
Why it matters
It outlines how dietary polyphenols and the gut microbiome co-regulate host metabolic and inflammatory pathways, providing a conceptual framework for dietary interventions targeting metabolic disorders.
Limits
The abstract does not provide quantitative data, search methodology, inclusion criteria, or risk of bias assessments. As a narrative review, it relies on secondary interpretations rather than primary clinical evidence, and long-term causal effects in human populations remain unestablished.
Cited by
- supports Fruits and vegetables provide polyphenols and non-nutrient compounds that feed the gut microbiome.