High Fibre Foods: What to Eat for Better Digestion

Dietary fibre is one of the most overlooked nutrients in modern diets—despite being one of the most important for digestive health. Across populations, higher fibre intake is consistently linked to better bowel function, greater gut bacterial diversity, and a more resilient digestive system.

What Is Fibre and Why Does It Matter?

Dietary fibre is a type of carbohydrate found in plant foods that isn't fully digested in the small intestine. Instead, it reaches the large intestine where it plays an important role in digestive health.

Fibre supports:

• regular bowel movements
• short chain fatty acid production
• stool bulk and transit time
• a balanced digestive environment

It also feeds beneficial gut bacteria. When certain fibres are fermented in the large intestine, they help support the growth of bacteria such as Bifidobacterium and Lactobacillus, contributing to a more resilient digestive system.

Most Europeans fall short of recommended intake. The good news: improving your fibre intake doesn't require a complete diet overhaul. With a few simple shifts—like choosing whole grains, adding more plant foods, and focusing on variety—you can support your digestion in a meaningful and sustainable way.

Types of Fibre (and Why Both Matter)

There are two types of fibre, and both types matter:

Soluble Fibre

Soluble fibre slows digestion and helps regulate blood glucose levels. It forms a gel-like substance in the gut and is typically found in:

• Oats
• Barley
• Apples
• Citrus fruits
• Legumes

Insoluble Fibre

Insoluble fibre adds bulk to stool and supports regular bowel movements. It's typically found in:

• Whole grains
• Nuts and seeds
• Vegetables like carrots and leafy greens

A balanced intake of both types is key. Most whole plant foods naturally contain a mix of both, which is why focusing on food variety is more effective than targeting one type alone.

High Fibre Foods: What to Eat Regularly

Here is a breakdown of the most reliable, everyday sources of dietary fibre:

High Fibre Fruits

• Bananas (~3 g)
• Berries
• Apples

High Fibre Vegetables

• Broccoli
• Carrots
• Leafy greens

High Fibre Carbs

• Oats (~4 g per serving)
• Wholegrain bread (~6 g per 2 slices)
• Brown rice

High Fibre Legumes

• Lentils
• Chickpeas
• Beans

High Fibre Nuts and Seeds

• Chia seeds (~5 g per tbsp)
• Flaxseed (~3 g per tbsp)
• Almonds
• Walnuts

High Fibre Snacks

High fibre snacks are one of the easiest ways to increase your daily intake. Instead of relying on refined, low-fibre options, choosing snacks that combine whole plant foods can help support digestion and keep you feeling fuller for longer. This is because fibre can slow down the release of energy from meals into our bloodstream, so we get a more gradual and stable energy supply from it.

Some simple, high fibre snack ideas include:

• An apple with nut butter
• Greek yogurt with berries and chia seeds
• Hummus with carrots or wholegrain crackers
• Homemade nut & date energy balls
• Air-fried chickpeas

These options provide a mix of fibre, healthy fats, and carbohydrates—helping to support more stable energy levels between meals. Rotating different snacks throughout the week can also contribute to overall plant diversity, which is linked to a more balanced gut microbiome.

How Much Fibre Do You Need?

European guidelines recommend 25–35 g per day for healthy adults. The average intake does vary from country to country across the continent, but by and large people fall short:

• men usually consume 18–24 g
• women 16–20 g

Modern diets—high in refined grains, processed foods, and low in vegetables, whole grains, and legumes—are a big part of why so many people miss the mark. In fact, some research shows that the average person consistently does not meet their 5 a day.

How to Increase Your Fibre Intake

Increasing fibre intake is most effective when done gradually and consistently. Some simple ways to get started:

• Build on what you already eat (e.g. switch to wholegrain options)
• Add, don't restrict—include more fruits, vegetables, and legumes
• Focus on variety, not just quantity

Research shows that consuming 30 or more different plant foods per week is associated with greater gut microbiome diversity—meaning that diversity matters just as much as total fibre intake.

A practical example:

• Add chia seeds to breakfast
• Choose wholegrain bread over refined
• Include vegetables at multiple meals
• Try adding a fruit as a snack once a day

Common Mistakes When Increasing Fibre

While increasing fibre is beneficial, doing it incorrectly can lead to discomfort. Common mistakes include:

• Increasing intake too quickly → can cause bloating or digestive discomfort
• Not drinking enough water → fibre needs water to support proper digestion
• Lack of diversity → relying on a few sources instead of a variety of plant foods

The key is to increase intake gradually—by keeping fibre changes to less than 5g (about 1 tbsp chia seeds or 2 pieces of fruit) on a day-to-day basis—and support it with hydration and variety.

Fibre, Digestive Health and the Microbiome

Fibre plays a central role in supporting the gut microbiome—the community of bacteria living in your digestive system. When fibre reaches the large intestine, certain types are fermented by beneficial bacteria. This process:

• supports bacterial diversity
• helps maintain balance within the digestive system
• contributes to a well-functioning gut environment

Diets higher in fibre are consistently associated with greater bacterial diversity, improved digestive function, short chain fatty acid creation, and a more resilient gut. Importantly, this effect is strongest when fibre comes from a wide variety of plant foods, not just one or two sources.

Long-Term Benefits of a High Fibre Diet

Fibre and Cholesterol

Fibre plays an important role in maintaining normal blood cholesterol levels. Soluble fibres—like beta-glucans—can bind bile acids in the digestive tract. As more bile is excreted, the body uses circulating cholesterol to produce more, helping maintain healthy cholesterol levels over time.

Fibre and Glucose

Fibre helps regulate how quickly carbohydrates are digested and absorbed. By slowing digestion, fibre supports more stable blood glucose levels, promotes sustained energy, and helps with satiety and appetite regulation.

Fibre and Women's Health

Fibre supports several aspects of women's health, including:

• Hormone metabolism (through oestrogen excretion)
• Digestive health (constipation is more common in women)
• Cardiovascular health, particularly during menopause

Fibre and Cancer Risk

According to the World Cancer Research Fund (WCRF), fibre is one of the strongest dietary factors associated with reduced risk of colorectal cancer. Research shows that every additional 10 g of fibre per day is linked to approximately 10% lower risk. Fibre supports this through increased stool bulk, reduced transit time, and supporting overall gut health.

Final Thoughts on High-Fibre Foods

Fibre is one of the simplest—and most effective—ways to support your long-term health. The goal isn't perfection or tracking every gram. It's about building habits:

• Choosing whole foods more often
• Eating a wider variety of plants
• Making small, consistent improvements

Over time, these changes add up—to better digestion, more stable energy, and a more resilient gut.