Related Experiment Video
Updated: May 14, 2026
07:15
An In Vitro Batch-culture Model to Estimate the Effects of Interventional Regimens on Human Fecal Microbiota
Published on: July 31, 2019
Diet-microbiota interactions and their implications for healthy living
Ian B Jeffery1, Paul W O'Toole
1Department of Microbiology, University College Cork, College Road, Cork, Ireland. i.jeffery@ucc.ie
Nutrients
|January 25, 2013
Summary
A balanced diet promotes a diverse gut microbiota, crucial for overall health and well-being. This microbial balance impacts immune function and may influence conditions like diabetes and inflamm-ageing.
Area of Science:
- Nutrition
- Microbiology
- Immunology
Background:
- Diet significantly impacts individual health and well-being.
- The gut microbiota plays a substantial role in mediating dietary effects on health.
- Long-term dietary patterns shape the composition and diversity of the gut microbiota.
Purpose of the Study:
- To review the evidence linking a balanced diet to a diverse gut microbiota.
- To explore the consequences of this microbial balance for healthy ageing.
- To focus on specific conditions influenced by gut ecology.
Main Methods:
- Literature review of studies on diet, gut microbiota, and health outcomes.
- Analysis of associations between dietary patterns (e.g., plant-based vs. meat-rich) and microbial diversity.
- Examination of the link between gut microbiota and immune-related disorders.
Main Results:
- Diets high in fruits and vegetables are associated with increased microbial diversity, favoring Prevotella over Bacteroides.
- Diets low in plant-based foods show the opposite microbial trend.
- Gut microbiota influences extend beyond the gut immune system, impacting systemic health.
Conclusions:
- A balanced, diverse microbiota, fostered by a healthy diet, is essential for healthy ageing.
- Gut microbial ecology is implicated in immune-related disorders such as Irritable Bowel Syndrome (IBS), diabetes, and inflamm-ageing.
- Further research into diet-microbiota interactions is crucial for understanding and managing age-related health conditions.
Related Concept Videos
01:18Functions of the Gut Microbiota
The gut microbiota includes trillions of microorganisms that colonize the human gastrointestinal tract, including bacteria, archaea, viruses, and fungi. This complex ecosystem plays a critical role in maintaining intestinal and systemic health. Most of these microbes inhabit the large intestine, establishing a relatively stable and diverse community that contributes to gut homeostasis through various metabolic, immunological, and protective mechanisms.Dominant bacterial phyla, such as...
01:27The Oral Microbiota
The oral microbiome includes a complex ecosystem comprising over 700 microbial species, identified through genomic sequencing and culture-based analyses to date. This community includes a core microbiome, found universally among individuals, and a variable component influenced by environmental factors such as diet, lifestyle, and host genetics. Site-specific conditions, including oxygen gradients, pH levels, and nutrient availability, determine the spatial distribution of these microorganisms...
01:22Introduction to the Human Microbiota
Microorganisms colonize various regions of the human body, including the mouth, nasal passages, throat, stomach, intestines, urogenital tract, and skin. The total number of microbial cells is estimated to range from 10¹³ to 10¹⁴—comparable to, or exceeding, the number of human somatic cells. This host–microbiome relationship has led to the conceptualization of humans as supraorganisms, wherein microbial communities perform vital roles in development, immunity, and disease...
01:22Probiotics
Probiotics are live, non-pathogenic microorganisms that confer health benefits by modulating the gut microbiota. The human gastrointestinal tract harbors a complex microbial ecosystem, and the balance of this microbiota is crucial for digestive and systemic health. Among the most extensively studied and utilized probiotics are species formerly classified within the genera Lactobacillus and Bifidobacterium. These organisms not only naturally colonize the human gut but are also consumed through...
01:27Microbiota of the Large Intestine
The large intestine hosts the most densely populated microbial ecosystem in the human body. This complex community primarily consists of anaerobic bacteria, with Bacillota (formerly Firmicutes) and Bacteroidota (formerly Bacteroidetes) as the predominant groups. The distribution of these microbes varies along different sections of the large intestine, influenced by local environmental factors such as oxygen availability and nutrient composition.The cecum, located at the beginning of the large...
01:30Development of Human Microbiota
The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from the skin...