If you’ve been struggling with bloating, cramping, unpredictable trips to the loo, or just a general sense that your digestion is “off”, you’re not alone. IBS, or Irritable Bowel Syndrome, affects a huge number of people in the UK (approximately 1 in 10), and while it may not be life-threatening, it can seriously impact your quality of life. As a nutritional therapist, I work with many clients dealing with chronic digestive symptoms linked to IBS—and I’ve seen first-hand how personalised nutrition can make a world of difference.
IBS doesn’t have to be a lifelong sentence. With the right support and a focus on root causes, it’s possible not just to manage symptoms, but to move towards genuine gut healing. If you’re curious where to begin, you can book a free discovery call with and get started on your healing journey.

What is IBS?
IBS is what we call a “functional” digestive disorder—meaning the gut doesn’t work quite as it should, but there’s no structural damage visible. It’s commonly diagnosed when other conditions like coeliac disease or IBD have been ruled out.
There are four different types of IBS:
- IBS-D (diarrhoea-predominant)
- IBS-C (constipation-predominant)
- IBS-M (mixed, with both diarrhoea and constipation)
- IBS-U (unclassified)
Typical symptoms include:
- Bloating and wind
- Abdominal cramping
- Diarrhoea, constipation—or fluctuations between the two
- A sensation of incomplete evacuation
- Mucus in the stool
Standard Treatments: What the Guidelines Say
According to the NICE guidelines for IBS, treatment often starts with general lifestyle and dietary tweaks:
- Eating regular meals, not skipping
- Reducing caffeine, alcohol, and fatty foods
- Drinking more fluids
If that doesn’t help, medications like antispasmodics, laxatives, or anti-diarrhoeals are used, along with low-dose antidepressants in some cases. Psychological support such as CBT or gut-directed hypnotherapy may also be recommended.
Then comes diet—often, clients are referred for a trial of the low FODMAP diet.
Low FODMAP Diet: What is it and is it the Solution?
With a low FODMAP diet the aim is to reduce the amount of Fermentable Oligosaccharides, Disaccharides, Monosaccharides, and Polyols-containing foods. This means drastically reducing or cutting out specific fermentable carbohydrates that can trigger symptoms in sensitive guts. When used short-term, a low FODMAP diet can be a brilliant tool, and many people see symptoms improve quite quickly.
But here’s the issue: I often see clients who have been put on and left on a fairly strict low FODMAP diet for over a year, sometimes longer—with no review or reintroduction in sight. That’s a big problem.
Why? Because long-term restriction of high-FODMAP foods means less variety in your diet—and that means less variety in your gut microbiome. A diverse microbiome is crucial for immunity, metabolic health, mood regulation, and more. When we starve those helpful gut bugs, we may reduce symptoms, but we’re also limiting our body’s resilience in the long run.
The key is to use the low FODMAP diet as a temporary reset—not a permanent solution. A proper reintroduction phase, guided by a nutrition professional, is essential, and can ultimately help you identify what foods, and in what quantities, trigger your digestive symptoms.
How Does IBS Affect Nutrition and Diet?
IBS can lead to a really complicated relationship with food. Many people begin cutting things out in hopes of feeling better—often without guidance. Over time, this can lead to:
- Nutrient deficiencies
- Unwanted weight loss
- Physical and mental fatigue
- Limited variety in the diet
- Food fear and anxiety
On top of that, chronic diarrhoea or poor digestion can reduce how well you absorb nutrients. Constipation can affect detox pathways, and lead to the recycling of used up hormones and cellular waste products. And low stomach acid or poor enzyme secretion can limit breakdown of food in the first place.
How Can Nutrition Affect IBS?
This is the good news: nutrition can profoundly support IBS. When we feed your body well, balance your gut bugs, and address any deficiencies or imbalances, the gut can begin to repair.
Nutrition can help to:
- Reduce inflammation
- Support a healthy gut lining
- Support a thriving gut microbiome
- Improve bowel regularity
- Build resilience to future flares
It’s not a one-size-fits-all approach—and it shouldn’t be. Your gut story is unique, and your nutrition plan should be too.
Taking a Root-Cause Approach to IBS with Nutritional Therapy
Nutritional therapy goes deeper than symptom management. We look to uncover what’s driving your symptoms—and that means asking the right questions and using testing when appropriate.
Here’s how we approach things:
Step 1: Full Case History
We’ll explore your symptoms, stress, lifestyle, food habits, and medical history in detail. This helps build a clear picture of what might be contributing to your IBS, and helps us narrow down on which foods may be contributing to a worsening of symptoms, and which foods are your safe foods. It also helps us better understand what testing, if any, would be most appropriate for you.
Step 2: Functional Testing
Depending on what we uncover in your initial consultation, we may look into doing further functional tests. These may include:
SIBO Breath Test:
A SIBO (Small Intestinal Bacterial Overgrowth) test looks for signs of bacterial overgrowth in the small intestine by measuring hydrogen and methane gases after drinking a sugar solution (usually glucose or lactulose). If you’ve got too many bacteria hanging out where they shouldn’t be, they’ll ferment the sugar and release gas—and that gas can lead to bloating, discomfort, and disrupted bowel movements.
Methane-dominant results are often linked with constipation (IBS-C), while hydrogen dominance tends to go hand-in-hand with diarrhoea (IBS-D).
There is a high prevalence of SIBO in clients with IBS, so a SIBO test could be really helpful and insightful.
Comprehensive Stool Analysis:
Yes, we’re talking about a poo test—but it’s incredibly insightful. It gives us a full snapshot of your gut health: from friendly bacteria levels and inflammation markers to enzyme function, immune activity, and any unwelcome guests like parasites or yeasts.
This can be especially useful when symptoms persist despite a “clean” bill of health from standard tests.
Food Sensitivity Testing:
This test checks for delayed IgG reactions to a wide range of foods—not to be confused with classic allergies, which involve immediate reactions and IgE antibodies. These slower reactions can cause ongoing bloating, loose stools, constipation, or discomfort for hours (or even days) after eating.
Used alongside your symptoms and history, it can help us shape a short-term elimination plan without guessing or over-restricting unnecessarily.
Leaky Gut Testing (Intestinal Permeability):
If your gut lining becomes too porous, undigested food particles and toxins can slip through into the bloodstream and trigger immune reactions. This can lead to inflammation, food sensitivities, and—you guessed it—IBS-type symptoms.
We can check for markers like zonulin or test how well certain sugar molecules are absorbed, which gives us clues about the gut lining’s integrity.
Organic Acids Test (OAT):
This clever little urine test gives a peek into what’s going on metabolically—things like yeast or fungal overgrowth, bacterial imbalances, and even certain nutrient levels. It’s especially helpful when we suspect something deeper is affecting your gut function or energy levels.
Blood Panels:
Functional blood work can pick up things standard panels often miss—like low B12 or magnesium, subtle thyroid issues, or inflammatory markers. Low thyroid function, for example, can really slow things down and look just like IBS-C. These results help us build a clearer picture of your overall health and how your gut fits into it.
Step 3: Personalised Treatment Plan
Based on the information collected in your initial consultation and any test results, we’ll build a nutrition, lifestyle and supplement plan that’s entirely tailored to you. This might include:
- Functional foods to help rebalance your gut
- Supportive supplements like enzymes, probiotics, or herbs
- Lifestyle support: stress, sleep, movement
- A phased reintroduction if you’ve been on an exclusion diet
This isn’t about rigid plans or lifelong restrictions. It’s about helping your gut thrive again.
Ready to work on your gut health?
If you’re tired of managing IBS with band-aid solutions and want a deeper, more sustainable approach, nutritional therapy can help.
Book a free discovery call with nutritional therapist Ilaria to find out how we can work together to support your gut, your health, and your quality of life.
Got any questions?
Drop us an email and we will get back to you shortly!