Mechanistic pathways linking gut microbial metabolites to mitochondrial function
A systematic review identifies four microbial metabolite classes with moderate-certainty evidence for direct effects on mitochondrial function.
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What the study showed
Butyrate and propionate were generally associated with enhanced mitochondrial biogenesis, ATP generation, and electron transport chain activity. Indoxyl sulfate generally impaired mitochondrial function; lipopolysaccharide also reached moderate certainty. PGC-1α was identified as a central regulatory node. Many metabolites showed concentration-dependent biphasic effects.
How it was done
Systematic review searching PubMed, Scopus, and Web of Science through March 2026, evaluating studies reporting direct mitochondrial endpoints for ten classes of gut-derived microbial metabolites.
Risk of bias
The abstract does not detail the certainty framework applied or the breakdown of included study types (in vitro, animal, human); certainty was moderate for only four classes and low or very low for the remainder, constraining clinical extrapolation.
What this study does NOT prove
This review does not demonstrate that modulation of the gut microbiota in humans produces measurable clinical benefits in mitochondrial function.
In clinical practice
There is insufficient basis for clinical interventions targeting the microbiota-mitochondria axis based on this synthesis. Findings are mechanistic and predominantly low-certainty.
Limitations
The abstract does not detail the certainty framework applied or the breakdown of included study types (in vitro, animal, human); certainty was moderate for only four classes and low or very low for the remainder, constraining clinical extrapolation.
Technical appendix
Version history
- 1.0 · 2026-08-08 — Auto-generated under Evidence Standard v1.0
Paid access: structured summary from public metadata; consult the original study at the source.