If your gut has been giving you grief, the first thing most people do is start cutting foods out. Dairy goes, then gluten, then anything remotely spicy. But working through IBS without a clear plan often leaves you more confused (and more restricted) than when you started.
Here's a more practical approach: work through it step by step, starting with what you're actually eating and how your body responds, before making any big changes.
TLDR: Managing IBS through diet works best when you track your symptoms before changing anything, learn to spot your personal trigger foods, and get professional guidance before trying restrictive approaches like low FODMAP. Cutting out whole food groups without support can backfire and create new problems.
Starting point: tracking before you cut anything out
Before you remove a single food from your diet, it helps to know what's actually causing the trouble. Jumping straight to elimination often means cutting out foods that were never the problem in the first place.
Step 1: keep a simple food and symptom diary
Write down what you eat, when you eat it, and how you feel over the following few hours. Note bloating, pain, wind, constipation or diarrhoea, and roughly how bad it was.
Two weeks is usually enough to start seeing patterns. You don't need anything fancy, a notes app or a notebook works fine.
Step 2: look for patterns, not single incidents
One bad day after a curry doesn't mean curry is your trigger. Stress, poor sleep, alcohol, and even your menstrual cycle can all influence gut symptoms on any given day.
Look for foods that show up repeatedly before flare-ups, not just once.
Step 3: rule out other possible causes
- Recent antibiotic use, which can disrupt gut bacteria
- Changes in physical activity or hydration
- New medications or supplements
- Increased stress or anxiety
IBS symptoms rarely come down to food alone, so this step matters more than people expect.
Common IBS trigger foods worth watching
Everyone's gut is different, but some food groups trip up a lot of people with IBS. Knowing the usual suspects gives you a starting point for your own tracking.
FODMAPs are a group of fermentable carbohydrates found in foods like onion, garlic, wheat, certain fruits, and legumes. They can draw water into the bowel and ferment quickly, which often leads to bloating and discomfort in people with IBS.
Fatty and fried foods
High fat meals can speed up gut contractions in some people and slow digestion in others, which is part of why fried food affects everyone differently.
If takeaway nights consistently line up with symptoms, it's worth paying closer attention.
Caffeine, alcohol and carbonated drinks
- Caffeine can stimulate the bowel and worsen urgency or diarrhoea
- Alcohol irritates the gut lining in some people
- Fizzy drinks add extra gas to an already sensitive system
None of these are automatic no-gos, but they're common enough triggers that they're worth testing deliberately rather than guessing.
Why the low FODMAP diet isn't a DIY project
The low FODMAP diet is one of the most well-researched approaches for IBS, and it genuinely helps a large number of people. But it's also one of the easiest diets to get wrong without guidance.
It's meant to be temporary
The full elimination phase typically runs for two to six weeks, not indefinitely. Staying on strict elimination long term can reduce the diversity of gut bacteria and make reintroduction harder down the track.
Reintroduction is the whole point
The real value of low FODMAP comes from the structured reintroduction phase, where foods are tested one at a time to find your actual triggers. Skip this step and you're left with a restrictive diet and no real answers.
It can tip into nutritional gaps
Cutting out wheat, dairy, and several fruit and vegetable groups all at once can leave gaps in fibre, calcium, and other nutrients if it isn't planned properly. This is exactly the kind of situation where working with a dietitian makes a real difference, rather than guessing your way through a long list of banned foods.
Everyday eating habits that can ease IBS symptoms
Diet isn't only about which foods you eat. How and when you eat plays a role too, and these habits are often easier to adjust than a full dietary overhaul.
Eating pattern adjustments
- Eating smaller, more regular meals instead of large ones
- Slowing down and chewing food properly
- Avoiding eating late at night close to bedtime
- Staying consistent with meal timing day to day
Fibre, fluids and gut movement
Fibre can help or worsen IBS depending on the type and the person, which is why a blanket "eat more fibre" recommendation often misses the mark. Soluble fibre from oats, for example, tends to be better tolerated than insoluble fibre from wheat bran.
Drinking enough water and staying physically active also support regular bowel movement, which can ease both constipation-type and diarrhoea-type IBS.
When it's time to see a dietitian about IBS
Plenty of people manage mild IBS symptoms with small adjustments on their own. But there are clear signs it's time to bring in professional support rather than keep experimenting alone.
Signs you shouldn't go it alone
- You've cut out multiple food groups and symptoms haven't improved
- You're feeling anxious or restricted around meals
- You've lost weight without meaning to
- Symptoms are getting worse instead of settling down
- You're unsure if your diagnosis is actually IBS or something else
What a dietitian actually does differently
A dietitian can guide you through a structured elimination and reintroduction process, rather than leaving you to trial and error. They'll also check your diet still covers your nutritional needs along the way, which matters more than people expect once several foods are off the table.
At Every-Bodies Dietetics, this kind of structured, personalised support is exactly what we focus on, helping people work through IBS without unnecessary restriction or guesswork.
Struggling With IBS? Get Support With Managing Your Symptoms
Living with irritable bowel syndrome (IBS) can make everyday eating challenging, particularly when you're unsure which foods may be triggering bloating, abdominal pain or changes in bowel habits.
Dietary management can play an important role in reducing symptoms. Strategies may include identifying individual food triggers, adjusting fibre intake or following a structured low-FODMAP approach under professional guidance.
At Every-Bodies Dietetics, our dietitians can help you understand your symptoms, identify potential dietary triggers and develop a personalised nutrition plan that supports gut health without unnecessary food restrictions.
Ready to take control of your IBS symptoms? Book a consultation with Every-Bodies Dietetics for practical, personalised nutrition support.
Key Takeaways
- Track food and symptoms for a couple of weeks before cutting anything out
- Common triggers include high FODMAP foods, fatty meals, caffeine, alcohol and fizzy drinks
- The low FODMAP diet is meant to be temporary, with reintroduction as the key phase
- Eating patterns like meal timing and fibre type matter as much as specific foods
- See a dietitian if symptoms persist, worsen, or you've already cut out multiple food groups
Frequently asked questions
Can IBS symptoms change over time, even if my diet stays the same?
Yes, IBS can fluctuate with stress, hormones, illness, and gut bacteria changes, even when your eating habits haven't shifted. This is part of why a food diary from a few months ago might not reflect your current triggers.
Do I need a formal IBS diagnosis before trying dietary changes?
It's worth getting a proper diagnosis first, since IBS symptoms can overlap with coeliac disease, inflammatory bowel disease, and other conditions that need different treatment. A GP can arrange the right tests before you start restricting foods.
How long does it usually take to notice if a food is a genuine trigger?
Most gut reactions show up within a few hours to a day or two, though some symptoms like bloating can build more slowly. That's why reintroduction testing is usually spaced out over several days per food group.
Is it possible to manage IBS without cutting out major food groups at all?
For some people, yes, especially when eating pattern changes, stress management, and smaller portion sizes make enough of a difference. Not everyone with IBS needs a strict elimination diet, which is something a dietitian can help assess early on.
What should I bring to a first appointment with a dietitian for IBS?
A food and symptom diary, a list of any medications or supplements, and details of any tests or diagnoses from your GP are all genuinely useful. It helps the dietitian build a plan around your actual history rather than starting from scratch.