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The human body contains a monogastric digestive system. In a monogastric digestive system, the stomach only contains one chamber in which it digests food. Several other animal species also have monogastric digestive systems, including pigs, horses, dogs, and birds. This chapter, however, focuses on the human digestive system.
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The gut microbiome is formed by a vast and diverse community of bacteria that colonizes our large intestine. These bacteria start residing in the gut from birth and continue diversifying throughout life, influenced by factors such as diet, lifestyle, and stress. The gut bacterial community also includes bacteria from food and those that enter the colon through the anus.
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Examining the healthy human microbiome concept.

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Human microbiomes are vital for health, impacting metabolism, immunity, and neurology. Defining a

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Area of Science:

  • Microbiome Research
  • Human Health
  • Microbial Ecology

Background:

  • Human microbiomes play crucial roles in health across the lifespan.
  • Their functions in metabolic, immunological, and neurological processes are increasingly recognized.
  • Despite advanced exploitation, a consensus on microbiome research and oversight is needed.

Purpose of the Study:

  • To examine progress and identify gaps in understanding the human microbiome.
  • To address the controversial definition of a 'healthy' human microbiome.
  • To propose a roadmap for advancing microbiome-health relationship research.

Main Methods:

  • Review of current microbiome research progress and challenges.
  • Analysis of the complexities in defining a 'healthy' microbiome.
  • Incorporation of epidemiological approaches and ecological principles.

Main Results:

  • Significant advancements in microbiome research exist, but key knowledge gaps remain.
  • Defining a 'healthy' microbiome is complicated by variability and diverse configurations.
  • A unified definition of a healthy microbiome is challenging to establish.

Conclusions:

  • Further research is required to fully harness the benefits of the human microbiome.
  • A roadmap integrating epidemiology and microbial ecology is proposed.
  • Expanding knowledge of the microbiome-health relationship is critical for future applications.