Impact of alcohol on gut microbial metabolism and the gut-liver-brain axis.
Level 5 - mechanism / opinion, no new human data
Narrative review without systematic search or meta-analysis
PubMed 42092564 · doi:10.1016/j.alcohol.2026.04.009
What was done
This narrative review synthesized literature on how alcohol exposure alters the composition and metabolic capacity of the gut microbiome. It examined disruptions in short-chain fatty acid production, mucin metabolism, biofilm formation, and bile acid metabolism, and discussed how ethanol-producing and ethanol-tolerant microbes influence the gut-liver-brain axis along with potential therapeutic strategies targeting these bacteria.
What was found
The abstract reports no quantitative data or effect estimates. It qualitatively describes how alcohol-induced dysbiosis impairs critical bacterial metabolic functions that sustain host gut, liver, and brain homeostasis, highlighting that microbial ethanol production and tolerance may exacerbate intestinal inflammation and liver injury.
Why it matters
It provides an overarching framework linking alcohol-induced alterations in microbial metabolism to multi-organ pathology, pointing to specific microbial metabolic pathways as potential therapeutic targets.
Limits
The paper is a non-systematic narrative review providing no primary human trial data, quantitative synthesis, or detailed study inclusion criteria in the abstract. Clinical efficacy of the proposed therapeutic strategies is not quantified.
Cited by
- supports Moderate alcohol consumption increases cancer risk and disrupts sleep architecture and the gut microbiome.