What is SIBO?


As the name suggests, SIBO, or small intestinal bacterial overgrowth, occurs when bacteria from your colon, enter your typically low bacteria-populated small intestine and begin to colonize. Many Gastroenterologists and Functional Medicine Practitioners are utilizing the SIBO breath test in most gut-related health issues.  In Canada, SIBO CLINIC CANADA provides the best service with the most accurate interpretations and protocols/recommendations.  

There are several reasons why SIBO happens. SIBO can cause or be caused by any disease. Having any one or more of the symptoms listed below may be a reason to get tested. For example, studies have indicated that potentially up to 80% of patients with IBS and 100% of patients with Fibromyalgia, in fact, have SIBO.

Common Signs:


  • Chronic Fatigue Syndrome

  • Acid Reflux

  • Rosacea

  • Restless Leg Syndrome (RLS)

  • Fibromyalgia

  • Gastroesophageal Reflux Disease (GERD)

  • Celiac Disease

  • Anxiety

  • Depression

  • Irritable Bowel Syndrome (IBS)

  • Irritable Bowel Disease (IBD)

  • Leaky Gut Syndrome

SIBO Breath Test


  • Gas

  • Belching

  • Bloating

  • Stomach Distension

  • Constipation/Diarrhea

  • Weight Gain/ Weight Loss

  • Poor digestion

  • Skin Problems

  • Food Allergies/Sensitivities




Breath testing measures the Hydrogen (H2) and Methane (CH4) gas produced by bacteria in the small intestine that has diffused into the blood and then filtered through the lungs for expiration. Hydrogen and Methane are gases produced by bacteria in the gut, not directly by humans themselves.


In the SIBO Breath Test, patients drink a sugar solution of glucose or lactulose after having followed a 1 or 2-day preparatory diet. The diet removes much of the food that would feed the bacteria, allowing for a clear reaction to the sugar drink. In the SIBO Breath Test, gases found in the breath are graphed at various times beginning at the time the glucose solution is ingested, through to almost the end of the small intestinal (SI) transit time, which takes about two to three hours.


Check out the video below to see how the SIBO Breath Test is performed.