Best Food for Gut Health: Tackle bloating, constipation and IBS symptoms naturally

Introduction

Best food for gut health: why your gut deserves more attention this May.

There are two special awareness days this month that shine a light on digestion and gut health — National Microbiome Day (12th) and World Digestive Health Day (27th).

So, it’s the perfect time to explore the best food for gut health to help you stay regular, feel lighter, and support long-term wellbeing. If you’d like a personalised plan that works for your gut, explore my Gut Health Clinic.

These awareness days are a great reminder that your gut does far more than just digest food. It plays a vital role in your immune system, mental health, and therefore overall health.

In the last ten years, research has exploded. We now know your digestive system is home to over 100 trillion microbes, collectively called the gut microbiome. Some are beneficial, some are less so. When they’re out of balance, it can show up as abdominal pain, bloating, chronic constipation, and all those fun (not!) gastrointestinal symptoms.

In a hurry? Start here 👇
Whether you’re skimming for a quick solution or looking for ideas to try today, these are some key things to remember.

🌿 Pro-tips

• Start with small portions of new fibre-rich foods and increase gradually. Your gut needs time to adjust.
• Choose live, unpasteurised fermented foods (like sauerkraut or kefir) for a natural source of good bacteria.
• If constipation or IBS is your main issue, begin with gentle soluble fibres like oats, chia seeds, and cooked veg.
• If high-FODMAP foods trigger bloating, try lower-FODMAP swaps like garlic-infused oil or green banana.
• Keep a list of plants you enjoy and tolerate well. Aim for 30+ different ones each week to build resilience. Vary them by season too.

🧠 Key takeaways for gut health

• Your gut microbiome is central to digestion, immune defence, hormone balance, and even mental wellbeing.
• Bloating, constipation, and IBS symptoms often improve with small, consistent changes to your diet and lifestyle.
• Soluble fibre feeds beneficial gut bacteria and helps repair the gut lining from the inside out.
• Probiotic foods introduce friendly bacteria that support better digestion, immune health, and inflammation control.
• Your gut is unique. The best results come from listening to your body and adjusting slowly based on your own symptoms.

Is your gut trying to tell you something? Bloating, constipation, and IBS explained

Why does my tummy feel so full and puffy?

Bloating often has more than one cause, and it’s usually a combination of things happening at once. It can happen if you don’t chew properly, swallow too much air, or if food moves too slowly through your gut. It’s also common with constipation, or when there’s an imbalance in your gut bacteria that leads to too much fermentation, especially after eating foods that ferment quickly, like beans and onions.

Am I constipated?

Constipation is incredibly common. I see it all the time in clinic. And you can be constipated without even realising it. You might still go regularly but have symptoms like straining, taking ages to start or finish, pebble-like stools, or not feeling fully empty afterwards.

It’s often caused by low fibre intake, dehydration, stress, or not moving enough. Your gut bacteria also play a part. When there’s an imbalance in your digestive tract, the signals that keep things moving, can slow right down.

What is IBS?

Irritable Bowel Syndrome (IBS) is a functional disorder, which means there’s no structural damage, but your digestive system isn’t working as it should. Nothing unusual shows up on scans or blood tests, but the symptoms are very real.

People with IBS often swing between loose stools and constipation, or experience sudden toilet urgency, severe bloating, and sharp abdominal pain.

Research links IBS to changes in gut bacteria, altered nerve signalling in the gut’s nervous system, and a more sensitive gastrointestinal tract, which means people with IBS often feel more pain from normal digestion.

🧠 Curious about the gut-brain connection? You might like this recent blog: Can stress cause IBS? Understanding the gut-brain connection and ways to find relief.

A healthy bowel movement should be a pleasurable experience!

#1 Fibre-rich foods : The Gut’s best friend

The best food for gut health is dietary fibre. Dietary fibre is found in plant foods like fruits, vegetables, wholegrains, nuts, seeds, and legumes.

Soluble fibre dissolves in water and forms a gel-like substance in the gut. You’ll find soluble fibre in foods like oats, chia seeds, flaxseeds, bananas, carrots

Insoluble fibre doesn’t dissolve. It adds bulk to your stool thereby improving its consistency and helps food move through the gut more effectivly, helping to prevent constipation. It’s found in foods like wheat bran, wholemeal bread, brown rice, nuts, and the skins of fruits and vegetables.

One important fact to understand about soluble fibre is that our beneficial bacteria use it as a food source, and ferment it in the large intestine. This fermentation process produces “post-biotics”. They are also called short-chain fatty acids (SCFA’s), an example being butyrate.  SCFA’s help strengthen the gut lining, reduce inflammation, and support the immune system.

A Note on IBS, Bloating, and Fibre Foods

If you’re living with bloating, constipation, or IBS symptoms, you might be thinking:
“Aren’t fibre-rich foods the things that make me feel worse?”

Yes, they can be for people with sensitive digestive systems, certain fibre-rich foods can trigger abdominal pain, loose stools or bloating.

Foods like onions, garlic, and legumes (peas, bean and lentils) contain something called FODMAPs. These are types of natural sugars found in some foods that can ferment quickly in your gut.

For lots more information and a helpful app, look up the research done at Monash University in Sydney. They are world leaders in researching IBS.

💡 So don’t worry:

• A gentle, gradual increase in fibre can help calm the gut over time. By starting slowly, using cooked fibre, and making adjustments based on your body’s symptoms, you can build up your gut’s tolerance and better bacterial levels.
• Increasing the variety of different foods containing soluble fibre will build the diversity, or the number of different species of beneficial bacteria in your gut. In the long run, this will reduce your sensitivity and allow you to enjoy a ever-wider range of foods.
• Improving the range of bacterial species will also have a significant impact on your immunity, mental health, and blood sugar control.

✨ Tip for Sensitive Guts:

• Start with soluble fibres (like overnight oats, soaked chia seeds, stewed apples, and cooked carrots), which are gentler.
• Increase by just 1-2 tablespoons of new fibre a day. Over time, your gut microbes will become more diverse and resilient.
• Drink plenty of water to help fibre move smoothly along.
• Use garlic-infused oil instead of whole garlic (the flavour stays, but the fermentable sugars don’t).

A simple, fibre-rich breakfast that’s easy on digestion and feeds your good gut bacteria.

#2 Prebiotics: Food for your beneficial bacteria

I’ve talked about fibre, both soluble and insoluble fibre, as being good for us. Let me now explain what prebiotics are.

Prebiotics are simply specific types of dietary fibre that the beneficial bacteria in your digestive tract love to eat.

Think of your gut like a beautiful garden.

• Prebiotics are the fertiliser. They feed and nourish the plants (your good bacteria) so they can grow strong.
• Probiotics are the seeds. They add new good plants (friendly live bacteria) into the garden to help it flourish.
• Postbiotics are the fruits and flowers. The natural health-boosting by-products made when the plants (bacteria) thrive.

Your gut is your garden, nurture it kindly

Typically, any food naturally rich in unprocessed fibre can act as a prebiotic. Some great examples include:

“Your body is your garden.
What you sow into it, you shall reap.”

Deepak Chopra – Best selling author & speaker for mind-body medicine

A hearty, high-fibre meal that supports your gut microbiome and tastes amazing too.

#3 PROBIOTICS: BOOSTING YOUR ARMY OF GOOD BACTERIA

As I’ve said, probiotics are the actual live bacteria that help maintain a healthy digestive system. We find probiotics in fermented foods. I’d argue that probiotic foods are probably the second best food for gut health you can eat each day.

Clinical trials have shown that fermented foods can help improve stool consistency, ease constipation, reduce bloating and abdominal pain.

Fermented foods help you absorb nutrients from your food; reduce inflammation through the production of short-chain fatty acids (these are called post-biotics); lower your risk of infection, improve blood sugar control, help with weight management and improve cholesterol levels. Wow!

There’s more… eating probiotic foods daily helps strengthen your gut microbiota, lower inflammation, and build resilience in your immune system, all of which play an important role in preventing chronic diseases like diabetes, heart disease, dementia and inflammatory bowel conditions.

But what if probiotics upset your gut?

Some people with IBS symptoms notice a bit of gas, bloating, or discomfort when they first introduce fermented foods. It’s normal for your gut to need a little adjustment time as the intestinal microbiome changes. Stick with it gently, unless symptoms are severe.

✨ Tips for Sensitive Guts:

• Start with just 1–2 teaspoons of yogurt or sauerkraut daily
• Choose plain live yogurt, no added sugars. Sugar feeds the bad bacteria
• If milk kefir causes bloating, try a water-based kefir instead
• If kombucha causes bloating, check there are no artificual sugars in it
• Always check labels: unpasteurised = live bacteria = good!
• Check the label – look for lactobacillus and bifidobacteria species of bacteria

Simple sauerkraut coleslaw 🥕🥬 – light, zingy, and full of gut-friendly bacteria

This easy coleslaw combines raw fermented sauerkraut with fresh vegetables, making it a great source of probiotic bacteria and natural enzymes. The lemon juice supports digestion by stimulating bile flow.

#4 PLANT-BASED DIVERSITY: FEED THE MANY, NOT JUST THE FEW

If there’s one golden rule for a healthy gut microbiome, it’s this: diversity matters.

Eating a wide variety of plant foods is like planting lots of different flowers in your gut garden. Each flower attracts and feeds different species of insects, just like different types of fibre feed different groups of beneficial bacteria in your gut. The more variety you plant, the more thriving, balanced, and resilient your gut ecosystem becomes.

A healthy, busy garden leaves little room for weeds to take over. Just like a diverse, well-fed gut microbiome helps crowd out harmful bacteria that could otherwise damage your digestive system. 🌸🐝🌿

🔬 A recent study found that people who ate 30 or more different plant foods each week had significantly higher gut bacteria diversity compared to those who ate fewer.

You might like to read the Zoe blog, “Why should you eat 30 plants a week?” It covers a lot of what we are talking about here. 30+ might sound like a lot to you, but remember, this includes all fruits, vegetables, whole grains, legumes, nuts, seeds, herbs and spices – so it’s really not that hard.

By eating a broader variety, you’re supporting a more stable, resilient digestive system. One that’s better equipped to bounce back after antibiotic use, environmental toxins and stress.

Find out more about in my blog: Probiotics after antibiotics: Building resilience after an infection.

But what if too much plant fibre causes bloating or discomfort?

✨ Tips for Sensitive Guts:

• Start by adding 1–2 new, or different, plant foods per week, not all at once.
• Favour lower-FODMAP options at first (e.g., spinach, carrots, kiwi, cucumber, quinoa).
• Cook veggies, e.g., steam to make them easier to digest
• Soak nuts and seeds, or sprout them
• Include fresh herbs and dried spices
• Experiment and keep a journal – find the foods you tolerate well and those you don’t. This will change over time though.

Rainbow strifry – full of crunch and plant variety

This dish is bursting with plant diversity. With more than 10 different vegetables, it helps feed a broad range of beneficial bacteria.

#5 MEDITERRANEAN DIET: A GOLD STANDARD FOR GUT HEALTH

If you’re looking for the best food for gut health, you can’t go wrong with the Mediterranean Diet. It is the most researched diet in the world and has stood the test of time as being the healthiest way of eating for longevity.

Packed with plant-based foods, healthy fats in olive oil and oily fish. It includes only modest amounts of lean locally farmed meats. It’s been praised in systematic reviews for supporting a healthy digestive system and reducing the risk of many chronic conditions.

Why is the Mediterranean Diet so good for your gut?

It’s naturally high in dietary fibre, antioxidants, and polyphenols, which feed good bacteria and help protect the delicate lining of the intestines.

It reduces bad bacteria that can worsen symptoms and lead to poor gut health. The healthy fats in olive oil support the production of bile acids, crucial for digesting fats smoothly and maintaining good stool consistency.

Warm lentil and goat’s cheese salad 🥕🧀 – hearty, fibre-rich and easy on the gut

#6 LIMIT RED MEAT AND AVOID PROCESSED MEAT

While focusing on the best food for gut health, it’s just as important to know what to limit. Eating too much processed meat has been shown to have a negative impact on your gut health.

Processed meats cause a rise in certain bad bacteria, like sulphate-reducing bacteria. Sulphate-reducing bacteria are a species of bacteria in the gut that break down sulphur compounds from certain foods.

When they do this, they release gases like hydrogen sulphide, which can damage the gut lining if there is too much. In small amounts, these bacteria are normal. But if they overgrow, they can cause problems like bloating, abdominal pain, and even worsen gut conditions like IBS or ulcerative colitis.

Heavy, fatty meat meals can slow down the movement of your stool, worsen chronic constipation, and aggravate abdominal pain and bloating.

Tips for Sensitive Guts:

• Limit red meat to a few times a month.
• Choose smaller portions (about a small palm-size).
• Swap processed meats like sausages, bacon, and deli meats for organic free-range poultry, venison, pasture-raised UK beef, or grilled fish.
• The good news is that reducing processed meat intake has been shown to cause significant improvements in gut bacteria species richness within just a few weeks!

Personalised guidance that actually fits your life

CONSIDER YOUR GUT’S SPECIFIC NEEDS

Everyone’s gut is unique.

For people with specific gut health issues like IBS symptoms, ulcerative colitis, gastroesophageal reflux disease (GERD), small intestinal bacterial overgrowth (SIBO), or functional constipation, it’s important to tailor dietary changes gradually and carefully, monitoring the results as you go.

Studies show that people with gut conditions experience significant differences in their symptoms based on their gut microbiome’s current state.

So dietary improvements, probiotic supplements, specific fibre choices, reducing stress and exercising appropriately can all play an important role in improving bowel habit, gut bacteria balance, and quality of life.

👩‍⚕️ Working with a nutritionist can help guide treatment options that suit your situation.

Homemade bone broth 🍖🥕 – soothing, mineral-rich and gut-healing

Conclusion: Your gut is your garden, nurture it wisely

Your gut is the heart of your health. When your gut microbes are thriving, it supports everything from your immune system and mental health to digestion, blood sugar balance, and even chronic disease prevention.

Eating the best foods for gut health, like fibre-rich plants, fermented probiotic foods, and colourful fruits and vegetables, can help you tackle bloating, ease constipation, and calm IBS symptoms naturally.

Introducing these foods gently, paying attention to high and low FODMAP options if you are sensitive, can help you build a stronger, more resilient gut over time.

The good news is that you do not need drastic changes. Simple, nourishing meals made with real food can feed your beneficial bacteria, improve your stool consistency, support better bowel habits, and protect your digestive tract long term.

Remember, a healthy gut is like a thriving garden. The more love and attention you give it through smart dietary choices and lifestyle changes, the more it will flourish, helping you to feel energised, comfortable, and well every single day.

If you would like personalised support to improve your gut health, I invite you to find out more about my Gut Health Clinic. You do not have to do it alone.

References

Gibson et al., 2017 – ISAPP Consensus Statement on Prebiotics
https://www.nature.com/articles/nrgastro.2017.75

David et al., 2014 – Diet rapidly and reproducibly alters the human gut microbiome
https://www.nature.com/articles/nature12820

De Filippis et al., 2016 – Mediterranean diet and gut microbiota
https://gut.bmj.com/content/65/11/1812

Muir and Gibson, 2013 – The low FODMAP diet for IBS and gastrointestinal disorders
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3995308/

Zmora, Suez, and Elinav, 2019 – You are what you eat: diet, health and the gut microbiota
https://www.nature.com/articles/s41575-018-0061-2