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What does Fibre do for the body? | Balance

Dietary fibre is an essential component of a healthy diet and plays a crucial role in maintaining overall well-being.

Often overlooked, fibre deserves more attention for its numerous benefits, including weight management, improved gut health, and reduced risks of chronic diseases.

In this comprehensive article, we will delve into the significant impact of dietary fibre on the body and provide insights into how you can make the most of it for optimal health.

Understanding Dietary Fibre

Dietary fibre, also known as roughage, is the indigestible part of plant foods. It is primarily found in vegetables, fruits, whole grains, and legumes.

There are two types of dietary fibre: soluble and insoluble. Soluble fibre dissolves in water and forms a gel-like substance in the digestive system, while insoluble fibre does not dissolve in water and helps push food through the digestive tract. Both types of fibre play essential roles in promoting health and well-being.

Soluble Fibre

Soluble fibre absorbs water and forms a gel-like substance in the stomach, which helps slow and ease digestion while also absorbing cholesterol.

This type of fibre is especially beneficial for managing blood sugar levels and lowering cholesterol. Some excellent sources of soluble fibre include oat bran, dry oats, barley, nuts, beans, lentils, and peas.

Insoluble Fibre

Insoluble fibre does not dissolve in water and speeds up the passage of food through the digestive system.

It adds bulk to the stool, promoting regular bowel movements and preventing constipation. Good sources of insoluble fibre include fruits, nuts, vegetables, and whole-grain foods.

The Remarkable Benefits of Dietary Fibre

1. Weight Management

A diet high in dietary fibre is associated with better weight management. High-fibre foods tend to be less calorie-dense, providing fewer calories per gram of food.

As a result, individuals consuming a high-fibre diet can eat the same volume of food but with fewer calories. Furthermore, high-fibre foods are often more filling, helping to control appetite and promote weight loss.

2. Improved Gut Health

Dietary fibre is essential for maintaining a healthy gut. It feeds the beneficial bacteria in the gut, promoting a well-balanced gut microbiome. This, in turn, supports the production of short-chain fatty acids, which are crucial for gut health and may protect against inflammation and certain diseases.

3. Reduced Risk of Chronic Diseases

A diet rich in dietary fibre has been linked to a reduced risk of several chronic diseases, including heart disease, type 2 diabetes, and certain types of cancer. Fibre's ability to lower cholesterol and regulate blood sugar levels contributes to these protective effects.

4. Better Blood Sugar Control

For individuals with diabetes, consuming a high-fibre diet can help slow down the absorption of sugar from the intestines, preventing blood sugar spikes and promoting better glycemic control.

5. Lower Cholesterol Levels

Soluble fibre has been shown to reduce levels of low-density lipoprotein (LDL) cholesterol, also known as "bad" cholesterol. By binding to bile acids in the digestive system and promoting their excretion, soluble fibre helps maintain healthier cholesterol levels, reducing the risk of heart disease.

6. Enhanced Digestive Function

Both soluble and insoluble fibre play crucial roles in supporting digestive function. Soluble fibre slows down digestion and helps to regulate the passage of food through the gastrointestinal tract.

Insoluble fibre, on the other hand, adds bulk to the stool and promotes regular bowel movements, preventing constipation.

7. Reduced Risk of Certain Cancers

Higher fibre intake has been associated with a reduced risk of specific cancers, particularly colorectal and breast cancers. The protective effects of fibre in these cases are thought to result from its ability to increase stool bulk, dilute potential carcinogens in the diet, and decrease transit time through the colon.

8. Better Cardiovascular Health

A diet high in dietary fibre has been linked to improved cardiovascular health, with studies showing reduced risks of heart disease and stroke. These benefits are attributed to fibre's cholesterol-lowering properties, as well as its ability to regulate blood sugar levels and promote a healthier gut microbiome.

9. Healthy Aging

Fibre becomes even more critical as we age, as the digestive system slows down with time. A high-fibre diet can help maintain smooth digestive function and promote overall health in older adults.

10. Natural Detoxification

Dietary fibre can support the body's natural detoxification processes. Soluble fibre binds to potentially harmful compounds, such as excess estrogen and unhealthy fats, preventing their absorption.

Insoluble fibre speeds up the passage of waste through the digestive system, reducing the time harmful substances spend in the body.

Meeting Your Daily Fibre Needs

Your daily fibre intake requirement can vary depending on age, sex, and life stage.

The general recommendation is for the average adult to achieve 30 g of fibre per day.

These recommendations decrease slightly for individuals over 50 years of age, and pregnant or breastfeeding women may require slightly more fibre in their diets. Children also have varying fibre needs depending on their age and sex.

To ensure you're meeting your daily fibre requirements, focus on incorporating a variety of fibre-rich foods into your diet, such as:

  • Whole grains: Opt for whole wheat bread, brown rice, quinoa, and barley.

  • Fruits and vegetables: Choose a variety of colorful fruits and vegetables, including those with edible skins and seeds.

  • Legumes: Incorporate beans, lentils, and chickpeas into your meals.

  • Nuts and seeds: Snack on almonds, walnuts, chia seeds, and flaxseeds.

The Importance of Staying Hydrated

When increasing your fibre intake, it's crucial to drink plenty of water to avoid abdominal discomfort or constipation. Adequate hydration helps ensure that fibre can effectively perform its functions in the digestive system.


Dietary fibre is an essential component of a healthy diet, offering numerous benefits for weight management, gut health, and disease prevention. By incorporating a variety of fibre-rich foods into your daily meals and staying hydrated, you can unlock the full potential of dietary fibre and support your overall health and well-being.

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