# The Gut Gambit: A Review of How Microbial Imbalance Fuels Metabolic Mayhem

## TL;DR

This review explains how gut microbiota imbalance causes metabolic disorders through oxidative stress and epigenetic changes.

## Contribution

The paper systematically reviews epigenetic and oxidative stress mechanisms linking gut dysbiosis to metabolic diseases.

## Key findings

- Gut dysbiosis disrupts short-chain fatty acids, bile acid metabolism, and immune signaling, contributing to obesity and metabolic syndrome.
- Epigenetic changes from gut microbiota disruption are linked to inherited metabolic disorders like insulin resistance.
- Therapies targeting gut microbiota, such as probiotics and fecal transplants, may reduce oxidative stress and inflammation.

## Abstract

Background/Objectives: An imbalance in gut microbiota, known as gut dysbiosis, results in reactive oxygen species overproduction, which can cause inflammatory conditions, damage DNA, trigger immunity, and induce epigenetic modifications of crucial genes that regulate metabolic pathways. Such a condition can also weaken the resilience of the protective gut wall and elevate colon permeability, allowing toxins from the gut to reach the liver and bloodstream, contributing to oxidative damage, autoimmune diseases, and epigenetic changes linked to metabolic disorders. Methods: The Scopus database was exclusively searched for the literature. Relevant articles were identified using predefined keywords, including gut dysbiosis, microbiota, microbiome, oxidative stress, metabolic disorders, inflammation, and epigenetics or combinations. Gut microbiota- and diet-induced metabolic disorders, particularly obesity, insulin resistance, dyslipidemia, and hypertension, may be inherited through epigenetic pathways. Results: The evidence analyzed suggests that the gut microbiota serves as a diverse metabolic and immunological organ. Its disruption affects the production of short-chain fatty acids, bile acid metabolism, immune signaling, and the redox balance, which contributes to the development of obesity, insulin resistance, and metabolic syndrome. Conclusions: This review highlights key epigenetic mechanisms underlying metabolic disorders and oxidative stress in the context of gut dysbiosis. Furthermore, therapeutic strategies targeting the gut microbiota, such as dietary interventions, prebiotics, probiotics, postbiotics, and fecal microbiota transplantation, hold promise for mitigating oxidative stress and inflammation associated with metabolic syndrome.