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Dysbiosis of the Gut Microbiota01:18

Dysbiosis of the Gut Microbiota

The human gut microbiome includes a diverse array of microbial species, including beneficial commensals and opportunistic pathogens, which interact to support host health. These microbes contribute to essential functions such as nutrient metabolism, immune system modulation, and maintenance of intestinal barrier integrity. However, disruptions to this equilibrium—referred to as dysbiosis—can have widespread physiological consequences.Dysbiosis is often characterized by reduced microbial...

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Matcha Green Tea Improves Cafeteria-Diet-Induced NAFLD by Modulating the Gut Microbiota in Rats.

Ho-Ching Chong1, Shu-Ting Tang1, Yu-Chieh Tseng1

  • 1School of Nutrition and Health Sciences, Taipei Medical University, Taipei 11031, Taiwan.

Nutrients
|October 16, 2025
PubMed
Summary

Matcha supplementation improved lipid metabolism, insulin resistance, and inflammation in rats with non-alcoholic fatty liver disease (NAFLD). The study found matcha also positively influenced gut microbiota composition, suggesting a potential therapeutic role in NAFLD management.

Keywords:
cafeteria dietdysbiosislow-grade inflammationmatchaobesityrat model

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Area of Science:

  • Biochemistry
  • Nutrition Science
  • Gastroenterology

Background:

  • Non-alcoholic fatty liver disease (NAFLD) is a growing health concern.
  • Dietary factors, such as cafeteria diets, can induce NAFLD and associated metabolic disturbances.
  • Understanding the impact of natural compounds like matcha on NAFLD is crucial for developing novel therapeutic strategies.

Purpose of the Study:

  • To investigate the effects of matcha on lipid metabolism in NAFLD.
  • To assess matcha's impact on insulin resistance (IR), inflammation, and gut dysbiosis in a NAFLD rat model.
  • To determine the efficacy of different matcha concentrations (0.2% and 1%) in ameliorating NAFLD-related conditions.

Main Methods:

  • A cafeteria diet was used to induce NAFLD in Wistar rats.
  • Rats were divided into control and various matcha-supplemented groups (0.2% and 1%).
  • Lipid profiles, glucose and insulin levels, inflammatory markers, and gut microbiota composition were analyzed after 12 weeks.

Main Results:

  • Cafeteria diet significantly increased triglycerides, cholesterol, blood sugar, insulin, HOMA-IR, leptin, and hepatic cytokines.
  • Matcha supplementation (0.2% and 1%) significantly reduced these markers, mitigating hepatic lipid accumulation.
  • Matcha intervention increased beneficial gut bacteria, including Akkermansia, Faecalibacterium, and Parabacteroides.

Conclusions:

  • A cafeteria diet induces NAFLD, characterized by abnormal lipid metabolism, IR, inflammation, and gut dysbiosis.
  • Matcha interventions (0.2% and 1%) demonstrate potential in regulating obesity, lipid accumulation, IR, and inflammation.
  • Matcha may promote a healthier gut microbiota, contributing to the amelioration of NAFLD development.