The role of dietary fibre in health

What is fibre?

Plant fibres are complex carbohydrates derived from plants that resist breakdown by the body’s own digestive enzymes in the stomach and small intestine. Instead, they pass intact through the system, where they perform a range of vital biological functions.

Fibre is often described simply as a tool for digestive regularity, but its function is significantly more complex and central to human health. By acting as a prebiotic, fibre provides the fundamental nourishment for our gut microbiome while regulating critical processes such as glucose absorption and nutrient uptake.

Regulated blood sugar and stable energy levels

Soluble fibres, such as pectin and beta-glucans, are often referred to as gel-forming fibres. Upon contact with liquid, they form a protective barrier along the mucosal lining of the stomach and intestines. This barrier directly impacts metabolism by delaying gastric emptying and slowing the absorption of glucose. The result is a more gradual rise in blood sugar following meals, contributing to stable energy levels and prolonged satiety.

The importance of fibre for intestinal barrier function

One of the most critical roles of fibre is providing indirect protection for the intestinal barrier. Consuming an abundance of plant fibres ensures that beneficial bacteria in the gut microbiome receive the nourishment required to thrive and proliferate. A balanced and resilient microbiome is, in turn, essential for maintaining a functional intestinal wall.

If the diet is deficient in fibre, beneficial bacteria risk depletion, which can lead to a weakened natural defense. This increases the risk of unwanted substances entering the system, potentially triggering systemic inflammation.

Prebiotics – essential fuel for gut bacteria

Fermentable fibres are classified as prebiotics. These reach the colon virtually untouched, where they are transformed by enzymes produced by beneficial gut bacteria. Inulin, found naturally in vegetables such as asparagus, is a prebiotic fibre that specifically stimulates the growth of beneficial lactic acid bacteria.

A diet lacking in these plant fibres can lead to dysbiosis (microbial imbalance) and a heightened risk of chronic inflammation.

Optimization of nutrient uptake

Fibre also influences where in the intestinal tract nutrients are absorbed. By regulating the passage through the digestive apparatus, fibre ensures that nutrient uptake occurs more efficiently and controlled further down the small intestine. This is part of the body’s holistic system for maximizing the extraction of nutrients from the food consumed.

Increasing daily fibre intake

Official guidelines recommend an adult intake of 25 to 35 grams of fibre per day, yet studies indicate that average intake is significantly lower. To reach recommended levels, consider these foundational additions:

• Consume potatoes and fruits with the skin intact, where a high concentration of fibre resides.

• Incorporate legumes—beans, lentils, or chickpeas—into meals.

• Prioritize nuts and seeds over processed alternatives.

 

Synbiotic – a scientific combination of fibres

Variation is essential for optimal gut health, as different bacterial strains require different types of fibre. The Synbiotic supplement contains four of the most extensively researched fibre types, creating a broad foundation for the microbiome:

• Pectin: Derived from sources such as apples and citrus fruits.

• Inulin: Naturally occurring in Jerusalem artichoke, onion, and chicory root.

• Beta-glucan: A vital fibre found in oats and barley.

• Resistant starch: Found in raw root vegetables, legumes, and green bananas.

By combining these prebiotic fibres with probiotics—a composition known as Synbiotics—a synergistic effect is created, providing beneficial bacteria with the optimal conditions to establish themselves and contribute to a balanced gut flora.

Increasing the intake of plant fibres is about more than satiety; it is about providing the human microbiome with the necessary tools to maintain homeostasis. By prioritizing a fibre-rich, plant-based diet, we support the body’s natural defenses and optimize long-term health.