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Root Causes of Irritable Bowel Syndrome

Irritable bowel syndrome (IBS) is a diagnosis being given with increasing frequency to patients who experience chronic digestive symptoms. The condition is characterized most commonly by the symptoms of intermittent cramping, abdominal pain, bloating, constipation and diarrhea. It occurs more commonly in women and is thought to occur in as many as 20% of the Canadian population. The diagnosis of IBS simply refers to the symptoms listed above. It does not offer any insight as to why the symptoms are occurring. There are significant underlying causes discussed below that should be evaluated in all patients suffering from IBS.

Food Allergies and Intolerances

Both IBS patients and researchers agree that food allergies and intolerances can be major triggers of IBS symptoms. However, adverse food reactions are rarely assessed and identified in IBS patients. Because these reactions can be delayed from several hours to days after the ingestion of an offending food, the connection between the food and resultant symptoms can be difficult for one to identify. Naturopathic physicians offer several options for food sensitivity assessment that may benefit IBS patients, including blood testing for delayed food allergies and elimination/reintroduction diet guidance.

Intestinal Imbalances (Dysbiosis)

Dysbiosis is a term used in naturopathic medicine to describe an imbalance in the normal mix of microorganisms called flora in the intestinal tract. Alterations in the intestinal flora include overgrowths of yeast, parasites and bacteria or deficiencies of healthy bacteria. They can be present in IBS patients for years. An abnormal increase in the yeast candida albicans is very common and can be triggered by antibiotic use or a high carbohydrate and sugar intake. A condition called SIBO (small intestine bacterial overgrowth) is also commonly associated with IBS. A detailed diet, medication and travel history along with specialized breath and stool testing can help naturopathic physicians identify the exact type of intestinal imbalance that is present. Treatment of dysbiosis includes herbal remedies to eradicate harmful microorganisms and probiotic supplements to replenish beneficial bacteria.

Stress-Induced Adrenal Imbalances

Another trigger of IBS that is well agreed upon is stress. Many people experience a clear increase in digestive symptoms when stress levels rise. Chronic elevations in stress levels can lead to imbalances in the function of our adrenal glands, which can trigger a vicious cycle that further diminishes our stress tolerance. Undiagnosed adrenal imbalances can be a significant contributing factor to IBS symptoms and can be readily assessed through saliva testing of the adrenal hormone cortisol.

Before a patient’s bowel is diagnosed as irritable the above potential triggers should be evaluated. Treatment of these root causes is often simple, potentially short term, and may lead to significant improvement in symptoms associated with IBS.

Join Dr. Veeravagu on Monday, February 29 at Choices Annex to learn more about IBS causes and how naturopathic medicine can help.


Dr. Arjuna Veeravagu is a naturopathic physician, registered acupuncturist and founder of Sage Clinic in Yaletown. More information about Sage Clinic can be found at To schedule a consultation with Dr. Veeravagu please email or call (604) 697-0397.