The Low FODMAP Diet: What It Is and Whether It Is Right for You

Introduction Irritable bowel syndrome is one of the most common diagnoses given to people experiencing persistent digestive symptoms. For many patients, the diagnosis comes after other conditions have been ruled out, and while IBS is a genuine and often debilitating condition, it is also frequently used as a catch-all label when the true underlying cause has not yet been identified. If you have been told you have IBS but continue to struggle with symptoms despite dietary changes, it may be worth exploring whether something else is contributing to how you feel. The Problem With IBS as a Diagnosis IBS is what is known as a functional diagnosis, meaning it describes a pattern of symptoms rather than a specific structural or biochemical abnormality. This is not a criticism of the diagnosis itself, but it does mean that the label alone does not tell you why you are experiencing symptoms or what is driving them. Several conditions can present with symptoms that closely mimic IBS, and in some cases these conditions go undiagnosed for years while patients manage what they believe to be straightforward IBS. Conditions That Are Commonly Mistaken for IBS Small Intestinal Bacterial Overgrowth (SIBO) SIBO is now recognised as a significant underlying cause of IBS-like symptoms, particularly bloating, excessive wind, and diarrhoea. Studies suggest that a substantial proportion of people diagnosed with IBS may actually have SIBO. It can be identified through a breath test and responds well to targeted dietary and medical treatment. Coeliac Disease Coeliac disease can present with bloating, diarrhoea, abdominal pain, and fatigue, all symptoms that overlap closely with IBS. It is estimated that a significant number of people with coeliac disease remain undiagnosed. A simple blood test can screen for it, and a definitive diagnosis is made through a gut biopsy. Bile Acid Malabsorption This is one of the most commonly overlooked causes of chronic diarrhoea. Bile acid malabsorption occurs when bile acids are not properly reabsorbed in the small intestine and pass into the colon, causing watery diarrhoea. It is often misdiagnosed as IBS-D (diarrhoea-predominant IBS) and can be identified through a SeHCAT scan or a trial of bile acid sequestrant medication. Food Allergies and Intolerances Lactose intolerance, fructose malabsorption, and non-coeliac gluten sensitivity can all cause digestive symptoms that look like IBS. Identifying these through proper dietary assessment and testing, rather than self-directed elimination, ensures that any dietary restrictions are both necessary and nutritionally safe. When Should You Seek a Specialist Assessment? If any of the following apply to you, it is worth seeking a specialist dietetic assessment rather than continuing to manage symptoms on your own: You have been diagnosed with IBS but have not seen significant improvement with standard dietary advice. Your symptoms include persistent or unexplained diarrhoea. You have unintended weight loss, fatigue, or signs of nutritional deficiency alongside your gut symptoms. You have a family history of coeliac disease or inflammatory bowel disease. You have tried the low FODMAP diet without success. What a Specialist Assessment Involves At GutSense Clinic, every assessment begins with a thorough review of your symptoms, medical history, dietary intake, and any previous investigations. From there, Jeanette will work with you to identify whether further testing is appropriate, develop a personalised dietary plan, and provide the ongoing support you need to see real, lasting improvement. Getting the right diagnosis is not just about having a label. It is about understanding what is happening in your body so that treatment can be targeted, effective, and sustainable. If you are ready to get some proper answers, book an appointment today.

ntroduction Digestive problems are incredibly common, yet many people spend years managing symptoms on their own without ever getting a clear explanation or the right support. Bloating, abdominal pain, unpredictable bowel habits, excessive wind, and fatigue after eating are all symptoms that can have a significant impact on daily life, but they are also symptoms that respond well to the right dietary intervention. At GutSense Clinic, we see patients every week who have been living with gut symptoms for months or even years, often having tried multiple diets, elimination approaches, or over-the-counter remedies without lasting relief. In many cases, a thorough specialist assessment reveals an underlying cause that has not previously been identified or addressed. Here are some of the most common gut conditions we treat, and what specialist dietary support can do for each one. Irritable Bowel Syndrome (IBS) IBS is one of the most frequently diagnosed gut conditions in the UK, affecting around one in five people at some point in their lives. It is characterised by a combination of abdominal pain, bloating, and changes in bowel habits, and while it is not dangerous, it can be genuinely debilitating. Diet is one of the most effective tools for managing IBS. The low FODMAP diet, developed by researchers at Monash University, has strong clinical evidence behind it and can significantly reduce symptoms in the majority of people who follow it correctly. However, it is a complex dietary protocol that requires proper guidance to implement safely and effectively. A specialist dietitian can take you through the process step by step, help you identify your personal triggers, and support you in reintroducing foods so that your long-term diet is as varied and nutritious as possible. Small Intestinal Bacterial Overgrowth (SIBO) SIBO is increasingly recognised as an underlying cause of IBS-like symptoms, particularly bloating, wind, and diarrhoea. It occurs when bacteria that should be confined to the large intestine migrate into and overgrow in the small intestine, interfering with digestion and nutrient absorption. SIBO can be identified through a breath test and is treated with a combination of dietary management and, in some cases, antibiotics. Dietary support is essential both during and after treatment to manage symptoms, support recovery, and reduce the risk of recurrence. Inflammatory Bowel Disease (IBD) Crohn's disease and ulcerative colitis are chronic inflammatory conditions that require long-term management. Nutrition plays a central role, both in managing symptoms during flares and in maintaining health during remission. People with IBD are at increased risk of nutritional deficiencies due to inflammation, malabsorption, and the effects of medication, making regular dietetic review an important part of their care. Coeliac Disease Coeliac disease requires a strict lifelong gluten-free diet, and getting this right is more complex than simply avoiding bread and pasta. Hidden sources of gluten, cross-contamination risks, and the nutritional gaps that can arise from a poorly planned gluten-free diet all need to be addressed. Specialist dietetic support at diagnosis and on an ongoing basis is strongly recommended in clinical guidelines. When Should You See a Specialist Dietitian? If you have been experiencing persistent digestive symptoms, have received a diagnosis but are unsure how to manage your diet, or have tried dietary changes without success, a specialist assessment could provide the clarity and direction you need. At GutSense Clinic, every consultation begins with a thorough review of your symptoms, medical history, and current diet. From there, Jeanette will work with you to develop a practical, evidence-based plan tailored specifically to your needs and your life. To book an appointment or to find out more, get in touch today.