Irritable Bowel Syndrome (IBS)

Digestive Health & Nutrition Care
Written By Jennifer Tang

Overview

Irritable bowel syndrome (IBS) is a common, chronic digestive condition that can cause abdominal pain, bloating, constipation, diarrhea, or a combination of bowel changes. Symptoms often come and go over time and can significantly affect daily routines and quality of life.¹˒²

At Tangible Health, we take an individualized, evidence-informed approach to IBS care. We look at your symptoms and bowel patterns alongside nutrition, stress, sleep, medications, lifestyle, and other digestive-health concerns to develop a plan aimed at reducing symptoms without unnecessarily restricting your diet.

What Is Irritable Bowel Syndrome (IBS)?

IBS is a chronic condition involving changes in how the digestive tract functions and communicates with the nervous system. It is often described as a disorder of gut–brain interaction, meaning symptoms can occur without visible damage or disease in the intestines.¹˒⁴ IBS commonly involves recurring abdominal pain together with changes in how often you have bowel movements or what your stool looks like.³

IBS is generally grouped according to the predominant bowel pattern:

  • IBS-C — primarily constipation

  • IBS-D — primarily diarrhea

  • IBS-M — a mixture of constipation and diarrhea²

IBS is different from inflammatory bowel disease (IBD), such as Crohn’s disease or ulcerative colitis. IBS does not cause intestinal damage and is not known to increase the risk of colorectal cancer or IBD.²

Common Symptoms of IBS

Symptoms vary considerably from person to person and may change over time. Common symptoms include:

  • Abdominal pain or cramping

  • Bloating or abdominal fullness

  • Constipation

  • Diarrhea

  • Alternating constipation and diarrhea

  • Changes in stool consistency or frequency

  • Feeling that a bowel movement is incomplete

  • Urgency to have a bowel movement

  • Mucus in the stool²˒³

Abdominal pain is often related to bowel movements, although it may improve or worsen after passing stool.³ Symptoms can fluctuate over time, and individual triggers may include certain foods, eating patterns, stress, illness, or other factors.⁵

Causes & Contributing Factors

There is no single known cause of IBS. Current evidence suggests that several factors may interact differently from person to person.¹˒²

Gut–Brain Communication & Digestive Sensitivity
The digestive system and nervous system continuously communicate with each other. In IBS, the gut may become more sensitive to normal digestive activity, which can contribute to pain, bloating, urgency, and discomfort.² Changes in how quickly or slowly the intestines move can also contribute to diarrhea or constipation.

Diet & Individual Food Triggers
Different foods can trigger symptoms in different people. Some people are particularly sensitive to certain fermentable carbohydrates known as FODMAPs, while others notice symptoms related to meal size, caffeine, alcohol, fatty foods, or other individual triggers.¹˒⁵ This does not mean that everyone with IBS has a food intolerance or should follow a highly restrictive diet.

Stress & the Gut–Brain Connection
Stress does not mean IBS is “all in your head,” but the gut and brain are closely connected. Psychological stress can influence digestive movement, sensitivity, and how strongly symptoms are experienced.¹˒²

Changes After an Infection
Some people develop IBS after an episode of gastroenteritis or another intestinal infection, sometimes called post-infectious IBS.²

Research is also exploring the role of the intestinal microbiome in IBS, but there is currently no single microbiome pattern or “dysbiosis” test that diagnoses the condition.

Our Approach to IBS

At Tangible Health, IBS care begins with understanding your particular symptom pattern rather than using the same restrictive diet or supplement protocol for everyone.

Your Symptoms & Bowel Pattern
We look at your abdominal symptoms, stool frequency and consistency, constipation or diarrhea patterns, bloating, urgency, previous digestive diagnoses, medications, and any investigations you have already completed. Identifying whether you primarily experience IBS-C, IBS-D, IBS-M, or another digestive condition helps guide treatment.

Your Nutrition & Gut–Brain Health
We consider your eating patterns, potential food triggers, fibre intake, stress, sleep, movement, and other factors that may influence digestive symptoms. When dietary changes are appropriate, the goal is to find the least restrictive approach that provides meaningful symptom relief while maintaining adequate nutrition.⁵

Your Goals
Your priorities may include reducing abdominal pain or bloating, improving bowel regularity, identifying food triggers, feeling more comfortable eating, managing symptoms during stressful periods, or having greater confidence and predictability in your digestion.

Treatments That May Be Included

Your individualized IBS plan may include:

  • Clinical nutrition to identify relevant food triggers, optimize fibre intake, and consider a structured low-FODMAP trial when appropriate

  • Lifestyle medicine to support movement, sleep, regular eating patterns, and digestive routines

  • Nutraceuticals & supplements such as soluble fibre when clinically appropriate

  • Botanical medicine, including consideration of enteric-coated peppermint oil for some IBS symptoms

  • Naturopathic counselling to support stress management and the gut–brain connection

  • Medication and supplement review to identify factors that may worsen constipation, diarrhea, or other digestive symptoms

  • Collaborative care with your family doctor, gastroenterologist, registered dietitian, or other healthcare providers when appropriate¹

What to Expect

Initial Assessment
We begin with a comprehensive review of your abdominal symptoms, bowel habits, diet, previous digestive conditions and testing, medications and supplements, stress, sleep, physical activity, medical history, and treatment goals.

Targeted Testing
IBS is usually diagnosed from the pattern of symptoms and medical history, with testing used selectively to rule out other conditions when appropriate.³ Canadian guidelines suggest testing for celiac disease in people with IBS but do not recommend routine food-allergy testing or broad diagnostic testing for every patient.¹

Personalized Plan
Your plan is developed around your IBS subtype, symptom triggers, eating patterns, lifestyle, health history, and goals. Treatment may include nutrition strategies, soluble fibre, lifestyle support, targeted supplements or peppermint oil, gut–brain strategies, and coordination with medical treatment when needed.

Ongoing Support
IBS symptoms can change over time. Follow-up allows us to assess what is helping, gradually broaden the diet when possible, adjust treatment, and investigate persistent or changing symptoms when appropriate.

When to Seek Support for IBS

Consider speaking with a healthcare provider if you experience:

  • Persistent abdominal pain or bloating

  • Ongoing constipation, diarrhea, or alternating bowel habits

  • Bowel symptoms that interfere with work, school, eating, travel, or daily life

  • Symptoms that are becoming more frequent or difficult to manage

  • Unexplained weight loss

  • Blood in the stool or black, tarry stools

  • Anemia or unexplained iron deficiency

  • A family history of inflammatory bowel disease, celiac disease, or colorectal cancer³

Symptoms such as bleeding, unexplained weight loss, or anemia are not typical IBS symptoms and may require further investigation.³

Book An Appointment

Frequently Asked Questions

  • Common symptoms include abdominal pain, bloating, constipation, diarrhea, or alternating between constipation and diarrhea. Symptoms often come and go over time.²

  • There is no single known cause. IBS appears to involve a combination of gut sensitivity, changes in bowel movement, gut–brain communication, diet, stress, and other individual factors.¹˒²

  • IBS is usually diagnosed based on your symptom pattern, medical history, and physical assessment. Testing may be used when needed to rule out conditions such as celiac disease or other digestive disorders.¹˒³

  • No. IBS and inflammatory bowel disease (IBD) are different conditions. IBS does not cause the intestinal inflammation or tissue damage seen with Crohn’s disease or ulcerative colitis.²

  • Stress does not necessarily cause IBS, but it can trigger or worsen symptoms because the brain and digestive system are closely connected.¹˒²

  • A short-term low-FODMAP diet can improve symptoms for some people with IBS. It should ideally be followed by food reintroduction and personalization rather than remaining highly restrictive long term.¹˒⁵

  • There is currently no single cure for IBS, but symptoms can often be managed effectively through individualized nutrition, lifestyle strategies, gut–brain therapies, supplements, and medications when appropriate.¹

 

Related Care

IBS can overlap with several areas of health. You may also benefit from:

Jennifer Tang
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