Related Experiment Video
Updated: Oct 22, 2025
04:16
Individualized Reconstitution of Human Milk Microbiota: A Feasible Approach in Real-World Settings
Published on: February 7, 2025
674
Infants' First Solid Foods: Impact on Gut Microbiota Development in Two Intercontinental Cohorts
Chiara-Maria Homann1,2,3, Connor A J Rossel4, Sara Dizzell1
1Department of Medicine, McMaster University, Hamilton, ON L8N 3Z5, Canada.
Nutrients
|August 27, 2021
Summary
Introducing solid foods significantly impacts infant gut microbes. Higher dietary diversity during this transition stabilizes the gut microbiome, promoting beneficial bacteria like Bifidobacteria.
Area of Science:
- Microbiology
- Infant Nutrition
- Gut Microbiome Development
Background:
- The introduction of solid foods marks a critical period for infant gut microbiome development.
- Infant gut bacterial dynamics and their relationship with diet are not fully understood.
Purpose of the Study:
- To investigate the day-to-day dynamics of infant gut microbiomes during solid food introduction.
- To explore the relationship between dietary intake and gut microbial composition in infants.
Main Methods:
- Analysis of gut microbiome composition in 24 infants over a 2-week period surrounding solid food introduction.
- Correlation of microbial richness, diversity, and community structure with daily dietary intake.
Main Results:
- Microbial richness and diversity increased over time and were positively associated with dietary diversity.
- High daily dietary diversity stabilized the gut microbiome structure.
- Bifidobacterial taxa were positively associated with dietary diversity, while *Veillonella* taxa showed a negative association.
Conclusions:
- Solid food introduction profoundly shifts the infant gut microbiome towards an adult-like state.
- Dietary diversity plays a crucial role in stabilizing the infant gut microbiome during the introduction of solids.
Related Concept Videos
01:23Anatomy of the Intestines
84.3K
Although digestion of proteins, carbohydrates, and lipids may begin in the stomach, it is completed in the intestine. The absorption of nutrients, water, and electrolytes from food and drink also occurs in the intestine. The intestines can be divided into two structurally distinct organs—the small and large intestines.
Small Intestines
The small intestine is an ~7 meter-long tube with an inner diameter of just 2.5 cm. Since most nutrients are absorbed here, the inner lining of the...
Small Intestines
The small intestine is an ~7 meter-long tube with an inner diameter of just 2.5 cm. Since most nutrients are absorbed here, the inner lining of the...
84.3K
01:29Bacterial Flora of the Large Intestine
764
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.
The normal gut flora of the colon plays a critical role in generating essential vitamins such as vitamins K, B5, and B7.
The normal gut flora of the colon plays a critical role in generating essential vitamins such as vitamins K, B5, and B7.
764
01:22Development of Immunocompetence
525
The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
525
01:28Microbial Nutrition
552
Organisms exhibit remarkable metabolic diversity, categorized based on how they acquire energy and carbon. These strategies enable survival in various ecological niches and are essential for maintaining energy flow and nutrient cycling within ecosystems.Energy and Carbon SourcesOrganisms are classified as phototrophs or chemotrophs based on energy acquisition. Phototrophs use light as their energy source, while chemotrophs rely on oxidizing chemical compounds. Further differentiation arises...
552