Dietary Fiber Gap and Host Gut Microbiota

Area of Science:

• Microbiology
• Human Metabolism
• Nutritional Science

Background:

• The gut microbiota is crucial for host metabolism and overall health.
• Dietary fiber is a primary source of microbiota-accessible carbohydrates.
• Modern diets often lack sufficient fiber, creating a 'fiber gap'.

Purpose of the Study:

• To discuss the interactions between gut microbiota and host diet, focusing on low-fiber intake.
• To highlight the consequences of the fiber gap on gut microbial diversity and host health.
• To explore the link between low-fiber diets and various health disorders.

Main Methods:

• Review of current scientific literature on gut microbiota and dietary fiber.
• Analysis of the impact of low-fiber diets on microbial diversity and metabolite production.
• Correlation of gut microbiota alterations with host health outcomes and diseases.

Main Results:

• Low-fiber diets significantly reduce gut microbiota diversity and beneficial metabolites, such as short-chain fatty acids.
• Reduced microbial diversity impairs host metabolism and immune function.
• The fiber gap is linked to increased risk of metabolic syndrome, obesity, IBD, liver disease, and colorectal cancer.

Conclusions:

• The fiber gap represents a significant threat to gut microbial health and host well-being.
• Maintaining adequate dietary fiber intake is essential for preserving gut microbiota diversity and preventing associated diseases.
• Further research is needed to fully understand the extent of the fiber gap's impact on human health.