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Related Experiment Video

Updated: Mar 14, 2026

An In Vitro Batch-culture Model to Estimate the Effects of Interventional Regimens on Human Fecal Microbiota
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Diet, gut microbiota and cognition.

Cicely Proctor1,2,3,4, Parameth Thiennimitr5, Nipon Chattipakorn2,3,4

  • 1Faculty of Life Sciences, The University of Manchester, Manchester, UK.

Metabolic Brain Disease
|October 7, 2016
PubMed
Summary

High-fat, high-sugar diets disrupt gut microbiota, impacting obesity and cognitive decline. The gut microbiota-brain axis offers a potential link, though mechanisms require further study.

Keywords:
A high fat/high sugar dietCognitionGut microbiotaObesity

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Area of Science:

  • Nutrition Science
  • Microbiology
  • Neuroscience

Background:

  • Diets high in fat and sugar contribute to obesity, type 2 diabetes mellitus (T2DM), cardiovascular disease, and cognitive decline.
  • The gut microbiota, comprising trillions of microorganisms, plays a crucial role in host health.
  • An imbalanced gut microbiota, or dysbiosis, is linked to obesity and may influence cognitive function.

Purpose of the Study:

  • To review current evidence on the relationship between diet, gut microbiota, and cognition.
  • To explore the proposed "microbiota-gut-brain axis" linking diet, gut microbes, and cognitive impairment.
  • To discuss potential mechanisms underlying the diet-microbiota-cognition interaction.

Main Methods:

  • Comprehensive review of in vivo studies, including rodent and human research.
  • Analysis of existing literature on the impact of dietary patterns on gut microbiota composition.
  • Examination of studies investigating the connection between gut dysbiosis and cognitive function.

Main Results:

  • High-fat diets are associated with altered gut microbiota and cognitive decline.
  • The gut microbiota-gut-brain axis is a proposed pathway mediating the effects of diet on cognition.
  • Specific gut microbial compositions are linked to obesity pathogenesis.

Conclusions:

  • Diet significantly influences gut microbiota composition, affecting host health and cognition.
  • The microbiota-gut-brain axis represents a complex interplay between diet, gut microbes, and brain function.
  • Further research is needed to elucidate the precise mechanisms involved in diet-microbiota-cognition interactions.