High-Fibre Foods: 10 Powerful Choices for Better Digestion

Fibre is a key component of any balanced diet, and far too many of us are falling short. Meals high in refined grains and processed convenience foods, and low in fruits and vegetables, may mean you're not giving your body the fibre it needs.

The great news is there's no need to splurge on special foods or follow complex diets to boost your fibre intake. You can do it with common foods like oats, apples, carrots, berries, nuts and green vegetables.

In my work sharing public health information, I aim to make nutrition advice practical and easy to apply. This article features 10 high-fibre foods along with an explanation of the fibre content of selected foods, and some quick and easy suggestions for including these foods in your diet.

Why is fibre important for your health?

Dietary fibre comes from plant foods such as fruit, vegetables, wholegrains, nuts and seeds, beans, and lentils. Certain types are used by some gut bacteria as fuel to produce beneficial substances.

According to the UK National Health Service (NHS), adults should aim to consume approximately 30g of fibre a day. Getting enough fibre supports healthy digestion, helps regulate bowel movements and can help prevent constipation. Research also links diets rich in fibre with a lower risk of certain chronic health conditions, including cardiovascular disease and type 2 diabetes.

However, if you take more than normal suddenly, then it might give you wind, bloating or stomach upset. Make changes gradually, drink plenty of fluids, and build up to larger amounts slowly.

Top 10 high-fibre foods to add to your diet

These foods offer different amounts of fibre alongside other nutrients. The best approach is to eat a variety rather than relying on one food to meet your daily needs.

1. Leafy green vegetables

Spinach, kale, romaine lettuce and other leafy greens provide fibre, vitamins and minerals. Although their fibre content varies, they are useful additions to meals because they help increase the variety of plant foods you eat.

How to consume: Incorporate greens into an omelette, toss them in a salad or spoon cooked greens onto your plate with the rest of the meal. Blend them into a smoothie or, for texture and to fill you up, eat whole vegetables with your meal.

2. Avocados

Avocados have fibre and unsaturated fats. They are soft, easy to put into a meal for breakfast, lunch or snack.

Ways to enjoy: Spread mashed avocado on wholemeal toast, slice up and add to a sandwich or stir through a salad with leafy greens. Portion size matters because avocado is nutrient-rich but also energy-dense, so eat an amount that satisfies your hunger.

3. Apples

Apples make a great snack and are an easy way to add fibre to your diet (unpeeled). Apples contain pectin, a form of soluble fibre and water and other plant compounds.

How to eat them: Wash an apple and enjoy it whole, slice it into porridge or pair it with a small handful of nuts. Whole fruit generally provides more fibre than clear fruit juice, which contains very little. Choosing whole fruit over sugary alternatives is also worth considering when exploring how sugar affects your diet.

4. Chia seeds and ground flaxseeds

Chia seeds and flaxseeds are tiny but can add fibre to your diet. Chia seeds have the ability to absorb liquid and expand to form a gel, and ground flaxseeds can be added to many foods.

How to eat them: Sprinkle a teaspoon onto your porridge, yoghurt or overnight oats. Alternatively, soak them in milk or a dairy-free alternative for a quick pudding. Build up intake gradually and take with adequate liquid. Seek advice before taking seeds if swallowing is a problem or if a special diet has been prescribed.

5. Berries

Raspberries, blackberries, strawberries and blueberries offer fibre, vitamins and other plant nutrients. Berries are especially easy, as they can be eaten fresh or frozen.

How to eat them: Mix the berries with plain yoghurts, porridge or a bowl of fruit. Use frozen berries if they are too costly or difficult to get hold of fresh.

If you're having a simple breakfast, oats, berries and a little bit of seeds are a good way to go. You'll get your fibre from all of the ingredients rather than just one.

6. Broccoli

Broccoli is high in fibre and rich in vitamins. It can be easily added to other vegetables, grains and protein foods.

How to eat it: Steam, roast with a small amount of oil, add to soups or pasta. Eat to a texture you are able to tolerate. Large amounts may not sit well at first- try smaller portions and build up to larger ones.

7. Oats

Oats are a good, convenient source of fibre (including beta-glucan, a type of soluble fibre). Oats can add more fibre to your breakfast to keep you feeling full longer and are quick and easy to prepare in various ways.

How to eat them: For a more satisfying breakfast, combine oats with fruit, nuts or seeds to add variety and fibre. Pairing these foods with protein can also help create a balanced meal. For more ideas, see High-Protein Breakfasts.

8. Carrots

Carrots are a good source of fibre and beta-carotene, which can be turned into vitamin A. Carrots are cheap, versatile and easy to include in meals.

How to eat them:  Eat carrot sticks with hummus. Grate carrots into salads. Toss them into soups, stews and roasted vegetable dishes. Raw carrots and cooked carrots are both good sources of the fibre you need in your diet.

9. Pears

Pears have fibre and water content; therefore, they are a helpful fruit. By eating the skin (when appropriate and cleaned), a greater amount of the fibre will be kept from the fruit.

Ways to eat them:  Snack on a pear, add it to your porridge, or blend it with some natural (plain) yoghurt. Drink pear juice less frequently than whole pears, if fibre is the aim.

10. Almonds

Almonds are rich in fibre, healthy unsaturated fats, protein and a whole host of other nutrients. They are portable, which makes them perfect to keep in your bag for whenever you need a quick snack between meals.

How to eat them:  Enjoy a small handful of unsalted almonds, add chopped almonds to porridge or sprinkle them over yoghurt. If you have a nut allergy, avoid almonds and choose a suitable alternative.

High-fibre foods per 100g: A quick comparison

The table below gives selected fibre values published by the British Nutrition Foundation. These figures help you compare foods, but they are not a complete measure of a meal's nutritional value.

Food           Fibre per 100g

Oats     7.8g

Almonds    10.0g

Berries     4.1g

Carrots     3.9g

Pears     2.3g

Apples     1.3g

Spinach     1.3g

Broccoli     1.4g

Source: British Nutrition Foundation. Values are approximate and may vary by food variety and preparation.

Notice that the amount of fibre per 100g is not the same as the amount you usually eat in one serving. For example, 100g of almonds is a much larger portion than many people would have as a snack. A practical diet combines reasonable portions of several fibre-rich foods.

Ways to achieve your daily fibre intake

Don't aim to consume the whole amount of fibre at a meal; rather, spread it out over the day. The following is a sample adult meal pattern, not a personalised dietary prescription.

• Breakfast: Oatmeal with berries and a couple of tablespoons of chia seeds.
  
  
• Lunch: Wholemeal bread with your choice of filling, with carrots or a salad on the side.
  
  
• Snack: An apple or pear and a handful of almonds.
  
  
• Dinner: Broccoli and leafy greens with a meal with wholegrains and/or beans.

Fibre is important, but it is only one part of a balanced diet. Including a variety of wholegrains, vegetables, fruit and protein sources helps you obtain different nutrients rather than relying on a single food group. A balanced approach also means understanding how protein influences healthy ageing

Is eating high-fibre foods good for piles and constipation?

Fibre can help support regular bowel movements as it bulks up the stool. Certain fibre is also capable of absorbing water, and this can assist in facilitating bowel movements. According to the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), excess fibre and sufficient intake of water are integral to a dietary regimen for constipation.

If you suffer from constipation, then increasing your intake of foods like oats, pears, skin-on apples, veggies and wholegrain foods might help you as a start. Remember that there are many other potential causes of constipation that fibre intake might not address.

The high fibre diet can also make it easier to have a bowel movement without straining, which can be useful if you have piles (haemorrhoids). A high fibre diet isn't a cure for piles, so seek medical advice if you have ongoing or recurrent piles or rectal bleeding.

Final thoughts

Ensuring high-fibre foods form part of your diet is simple, if you gradually make small, consistent changes. Oats at breakfast time, fruit between your main meals and vegetables with your meal. Include nuts and seeds, beans and grains that suit you.

In Public Health communication, my advice is most helpful when readers can implement it easily without feeling overwhelmed. There is no need to change everything at once. Add variety slowly, monitor your body's response and consult your healthcare professional if symptoms don't improve.

Frequently Asked Questions

• What food is the highest in fibre?

There is no single answer for every food category. In the British Nutrition Foundation's selected food table, almonds provide 10g of fibre per 100g, and oats provide 7.8g per 100g. Bran products, seeds and some legumes can also be particularly fibre-rich. Compare the amount per 100g with the portion you would realistically eat.

• How can I get 100% of my daily fibre?

For most adults in the UK, the general target is around 30g daily. You can work towards it by including whole grains, vegetables, fruit, beans, nuts and seeds across your meals. You do not need to reach the target in one sitting. Increase fibre gradually and drink enough fluids.

• What drink is high in fibre?

Most clear drinks, including water, tea and strained fruit juice, contain little or no fibre. Smoothies made with whole fruit may retain some fibre, especially when the pulp is included, but the amount depends on the ingredients and preparation. Water remains a useful drink when increasing fibre intake.

• Which high-fibre foods are suitable for children?

Age-appropriate options can include oats, pears, apples, berries, carrots, wholegrain bread and beans. Offer a variety of foods in textures suitable for the child's age and development. Young children have different nutritional needs from adults, so do not simply apply the adult 30g target to them. Seek advice from a qualified health professional if you are concerned about a child's diet or constipation.

• Can high-fibre foods help with piles?

Fibre may help soften and bulk up stools, making bowel movements easier and potentially reducing straining. It does not cure every cause of piles. Persistent pain, bleeding or ongoing bowel changes should be assessed by a healthcare professional.

References

• British Nutrition Foundation. (n.d.). Fibre. https://www.nutrition.org.uk/nutritional-information/fibre/
  
  
• National Health Service. (n.d.). How to get more fibre into your diet. https://www.nhs.uk/live-well/eat-well/digestive-health/how-to-get-more-fibre-into-your-diet/

• National Institute of Diabetes and Digestive and Kidney Diseases. (n.d.). Eating, diet, & nutrition for constipation. https://www.niddk.nih.gov/health-information/digestive-diseases/constipation/eating-diet-nutrition

• Jane's Health Insider designed the visuals and infographics to illustrate key wellness concepts.
  
  
  

Written by Jane Brown

Jane Brown is a Health Educator and Public Health Advocate dedicated to translating evidence-based research into practical everyday wellness. With expertise in health and social care, she founded Jane's Health Insider to help readers make informed decisions about their physical and mental well-being.