The Role of the Gut Microbiota in the Relationship Between Diet and Human Health.

Annu Rev Physiol

Division of Gastroenterology and Hepatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; email:

Published: February 2023


Article Synopsis

  • The relationship between diet, the gut microbiome, and overall health is intricate, with healthy diets typically being high in fiber, healthy fats, and polyphenols, while low in unhealthy fats and refined carbs.
  • The rise of high-calorie, ultraprocessed foods in Western diets has contributed to health issues like obesity and heart disease.
  • The gut microbiome plays a significant role in how diet affects health by producing metabolites that influence health outcomes, and this review highlights how dietary choices can both promote health and increase disease risk, as well as serve as treatment options.

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Article Abstract

The interplay between diet, the gut microbiome, and host health is complex. Diets associated with health have many similarities: high fiber, unsaturated fatty acids, and polyphenols while being low in saturated fats, sodium, and refined carbohydrates. Over the past several decades, dietary patterns have changed significantly in Westernized nations with the increased consumption of calorically dense ultraprocessed foods low in fiber and high in saturated fats, salt, and refined carbohydrates, leading to numerous negative health consequences including obesity, metabolic syndrome, and cardiovascular disease. The gut microbiota is an environmental factor that interacts with diet and may also have an impact on health outcomes, many of which involve metabolites produced by the microbiota from dietary components that can impact the host. This review focuses on our current understanding of the complex relationship between diet, the gut microbiota, and host health, with examples of how diet can support health, increase an individual's risk for disease, and be used as a therapy for specific diseases.

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http://dx.doi.org/10.1146/annurev-physiol-031522-092054DOI Listing

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