We hear a lot about eating more fibre—and for good reason.

Fibre supports regular bowel movements, feeds parts of our gut microbiome and helps make meals more satisfying. Fibre-rich foods such as vegetables, fruit, legumes, nuts, seeds and wholegrains also bring plenty of other useful nutrients with them.

But if you have ever enthusiastically added bran cereal, chia seeds, lentils, raw vegetables and a fibre supplement to the same day, you may have discovered the less glamorous side of “healthy eating”: bloating, wind and a stomach that suddenly needs its own postcode.

That does not necessarily mean fibre is bad for your gut or that you need to remove every food that caused a symptom. Often, the amount changed too quickly, the type of fibre did not suit you, or your digestion simply needed more time to adapt.

The gentler approach is usually to build fibre gradually, vary where it comes from and pay attention to your own tolerance.

What is fibre?

Dietary fibre is the part of plant food that is not fully digested in the small intestine. It continues into the large intestine, where different fibres can add bulk, hold water or be fermented by gut bacteria.

You will often hear fibre divided into soluble and insoluble types, although many foods contain a mixture.

• Soluble fibre absorbs water and can form a gel-like texture. It is found in foods including oats, barley, legumes, chia, linseeds and some fruit and vegetables.
• Insoluble fibre adds bulk and helps food and waste move through the bowel. It is found in foods such as wheat bran, wholegrains, vegetable skins, nuts and seeds.
• Fermentable fibres and resistant starches can be used by gut bacteria. They are found in a wide range of foods, including legumes, oats, onions, garlic, slightly green bananas, and cooked and cooled potato or rice.

Different fibres do different jobs, which is why variety matters more than finding one supposedly perfect “gut health” ingredient.

How much fibre do we need?

Australian nutrient reference values set an adequate daily intake of around 25 grams for adult women and 30 grams for adult men. Higher suggested dietary targets—28 grams for women and 38 grams for men—are associated with reducing chronic disease risk.

You do not need to count every gram. These figures are a guide, not another number to obsess over.

A useful goal is to include plant foods regularly across the day: vegetables, fruit, legumes, nuts, seeds and mostly wholegrain cereal foods. If your current intake is quite low, moving towards this pattern gradually is more comfortable than trying to reach a target overnight.

Why can more fibre cause bloating?

When gut bacteria ferment some fibres, they produce gas. That is a normal part of digestion, but a sudden increase can produce more gas than feels comfortable.

Increasing fibre quickly can also change stool bulk and bowel habits. If you are not drinking enough fluid, some fibre additions may worsen constipation rather than relieve it.

Bloating can also have causes unrelated to fibre, including eating quickly, swallowing air, fizzy drinks, constipation, irritable bowel syndrome, coeliac disease and food intolerances. Hormonal changes can affect bloating too.

This is why the answer is not always “more fibre” or “less fibre”. It is about finding the amount, types and pace that work for you—and investigating symptoms that persist.

1. Add one thing at a time

If you change breakfast, lunch, snacks and dinner all at once, it becomes almost impossible to tell what helped or what caused discomfort.

Choose one manageable addition and keep the rest of your routine fairly familiar for several days. Lentils and beans are some of my favourite ways to do this because they are inexpensive, sit happily in the pantry and can stretch a family meal without changing it beyond recognition.

You could try:

• Adding a spoonful of oats to yoghurt.
• Including one extra cooked vegetable at dinner.
• Swapping white bread for a mixed-grain or wholemeal option.
• Adding a small amount of rinsed canned lentils to mince.
• Having a piece of fruit with a handful of nuts.

Once that feels comfortable, add another small change.

2. Start with a smaller serve

A food can be nutritious without your gut enjoying a giant serving of it on day one.

If legumes make you bloated, begin with one or two tablespoons of well-rinsed canned lentils or chickpeas mixed into a familiar meal. If chia seeds are new, start with a teaspoon rather than building a pudding from half the packet. If you rarely eat wholegrains, change one meal instead of every grain in the pantry.

Tolerance is individual. Starting small gives your digestive system time to adjust and helps you learn what amount works for you.

My favourite starting point: lentils and beans

Lentils and beans provide fibre, plant protein and useful minerals, while also making meals go further. They are real-food multitaskers—and considerably less expensive than most products with the words “gut health” printed on the front.

If you are not accustomed to legumes, you do not need to begin with an enormous bean salad. Start by adding a small amount to food you already eat:

• Stir a few tablespoons of rinsed canned lentils into bolognese, shepherd’s pie or taco mince.
• Add cannellini or butter beans to chicken soup, tomato-based pasta sauce or a casserole.
• Mash white beans into soup to make it creamy without needing cream.
• Add chickpeas to a tray bake or crush them into a sandwich filling.
• Mix black beans or kidney beans through rice, chilli or quesadillas.
• Blend lentils into a vegetable soup if texture is the family objection.

Canned legumes are perfectly useful. Drain and rinse them well, begin with a small serve and increase it gradually as tolerated. This can be more manageable than serving a full bowl of beans to a gut—and a family—that was not consulted about the sudden lifestyle change.

If one type does not suit you, try a smaller portion or a different legume rather than deciding you can never eat any of them. Red lentils cook down softly; canned lentils retain more shape; butter beans are mild and creamy; and chickpeas have a firmer texture. The best option is the one that works in meals you already enjoy.

3. Choose cooked foods when raw feels difficult

You do not have to survive on enormous raw salads to eat well.

Cooking softens the structure of many plant foods and can make them feel easier to digest. Try soups, stews, tray-baked vegetables, stewed fruit, porridge or vegetables cooked into pasta sauces.

Peeling fruit or vegetables temporarily may also reduce the fibre load while you build tolerance. The goal is not to remove skins forever, but to meet your digestion where it is today.

A bowl of vegetable soup still counts. So does an apple cooked into porridge. Gut health does not require suffering through a cold kale mountain.

4. Increase fluid alongside fibre

Fibre and fluid work together. Some fibres absorb water, helping stools stay softer and easier to pass.

Keep water available through the day and drink regularly, particularly in hot weather, while exercising, breastfeeding or increasing fibre. Your needs will vary with body size, activity, climate, health and the rest of your diet.

There is no prize for forcing excessive water, but adding lots of fibre while barely drinking can be a fairly efficient recipe for discomfort.

5. Build variety—not just volume

Gut-health advice sometimes becomes a competition to eat the largest possible number of plants. Variety can be useful, but it does not need to mean buying 30 expensive ingredients or adding a “superfood” powder to everything.

Think in ordinary food categories:

• Different coloured vegetables.
• Fresh, frozen, canned or stewed fruit.
• Oats, barley, wholegrain bread, brown rice or wholemeal pasta.
• Beans, chickpeas and lentils.
• Nuts and seeds.
• Herbs and spices.

Frozen peas count. Canned beans count. The herbs from the garden count. Yesterday’s cooked potato repurposed into today’s lunch counts too.

Use what you already have and rotate foods over the week. Your gut does not know whether the lentils came from an artfully labelled health-food pouch or a 95-cent tin.

6. Notice the fibre type that affects you

Not all fibres behave in the same way.

Highly fermentable ingredients such as inulin, fructooligosaccharides (FOS) and galactooligosaccharides (GOS) may worsen gas-related symptoms for some people with IBS. These can appear naturally in foods and may also be added to fibre bars, protein products, supplements and “gut health” foods.

Other fibres may be better tolerated. Oats, linseeds or particular supplements can be useful for some people, but supplements are not automatically gentler or better than food.

If you have diagnosed IBS or persistent symptoms, a dietitian trained in gastrointestinal nutrition can help match the fibre approach to your symptoms. A low-FODMAP diet is a short-term diagnostic and management process for medically diagnosed IBS—not a forever list of foods to fear—and should include structured reintroduction and personalisation.

7. Look at the whole day

Sometimes it is not one “problem food”. It is the total load.

A large oat breakfast, lentil salad, several pieces of fruit, a high-fibre snack bar and bean chilli may each be manageable alone. Together, on a day when you are rushed, constipated or stressed, they may be too much.

Spread fibre-rich foods across meals rather than concentrating them into one heroic gut-health afternoon. Eat slowly when you can, chew well, move your body regularly and give yourself enough time to use the toilet. Digestion is affected by more than ingredients.

A gentle way to begin this week

Rather than overhauling your diet, choose two small changes:

1. Add one fibre-rich food you already like.
2. Drink regularly through the day.

For example:

• Porridge with stewed apple for breakfast.
• A few spoonfuls of rinsed lentils mixed into bolognese, shepherd’s pie or taco mince.
• Frozen peas stirred through rice.
• Wholegrain toast with eggs.
• A small handful of nuts with fruit.
• An extra cooked vegetable beside dinner.

Stay with the change for several days. If it feels comfortable, build from there.

When should you seek help for bloating?

Occasional bloating is common. Speak with your GP if it is frequent, persistent, worsening or interfering with daily life.

Seek medical advice promptly if bloating occurs with concerning symptoms such as unexplained weight loss, blood in your stool, vomiting, fever, severe or persistent abdominal pain, a significant change in bowel habits, or an inability to pass stool or gas.

Do not remove gluten before being tested for coeliac disease, as this can affect the accuracy of testing. And before cutting out multiple food groups, get help to identify what is actually happening. Restriction can make eating harder while leaving the underlying problem untouched.

Fibre should expand your diet—not shrink it

Eating for gut health is not about forcing your body to tolerate the biggest salad possible or removing every food connected to one uncomfortable afternoon.

Go gently. Start with familiar foods, use smaller portions, cook foods when that feels better and increase variety over time. Pay attention to symptoms without allowing them to turn every meal into an investigation.

Food fear tells us to keep removing. Food literacy helps us understand what to add back—and how to do it in a way our body can manage.

General information disclaimer

This article provides general nutrition information only and is not a substitute for individual medical or dietetic advice. Speak with your GP or an appropriately qualified dietitian if you have persistent digestive symptoms, a diagnosed gastrointestinal condition or concerns about changing your diet.