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Small Intestine Bacterial Overgrowth Test


This test requires a sample of breath. There should be a 24 hour preparation period prior to starting the test, which should be started with a 12-hour preparation diet followed by a 12 hour overnight fast, this process will take 3 hours to collect the samples at timed intervals.

You should receive your test kit within 2 working days of your order, however, this may take longer with the current Covid 19 situation.

Your sample needs to be sent using guaranteed next day delivery or via courier – (not included in price)

Turnaround time for receiving results is 12 working days. We will be sent your results first and will then dispatch them to you. We offer a service to interpret your results and provide you with recommendations to improve any findings within them. This would require an initial consultation with us – you can book an initial consultation on our booking page 

View a sample report


SIBO (Small Intestine Bacterial Overgrowth) is a condition in which bacteria that should be in the large intestine begin to congregate in the small intestine in far higher numbers than normal. This happens when the migrating motor complex (MMC) fails to effectively sweep bacteria in the small intestine back into the large intestine between meals. Once in the small intestine, these bacteria multiply and feed off carbohydrates from food, creating gases, specifically methane and hydrogen. These gases are responsible for the SIBO symptoms which include abdominal pain, bloating, flatulence, constipation and diarrhoea.

It is now thought that SIBO may be the underlying cause in many cases of IBS as well as one cause of intolerances to sucrose, fructose and lactose. Overgrowths of bacteria in the small intestine can also lead to malabsorption, pale fatty stools and anaemia.

But SIBO can affect much more than just digestion and absorption. It is also associated with:

  • Chronic pancreatitis
  • Fatigue
  • Nausea
  • Acid Reflux
  • Acne rosacea
  • Skin Rashes
  • Restless legs
  • Joint pain
  • Weight loss or gain
  • Food sensitivities
  • Incontinence
  • Headaches
  • Interstitial cystitis
  • Rheumatoid arthritis
  • Chronic Fatigue Syndrome
  • Fibromyalgia

The only way to currently diagnose SIBO is by taking a SIBO breath test. The test works by measuring the production of hydrogen or methane gas after the ingestion of glucose or lactulose. If there is an overgrowth of bacteria in the small intestine, large quantities of fermentation gases will be produced and can be detected in a breath sample.

The lactulose test is most useful for diagnosing bacterial overgrowth at the end of the small intestine. This is commonly associated with constipation dominant IBS.

The glucose test is most effective for assessing bacterial overgrowth in the upper part of the small intestine. This is typically present in cases of diarrhoea dominant IBS

A SIBO test is recommended to those who:

  • Suffer from IBS, especially if there is a lot of abdominal bloating and gas
  • Have one of the conditions above that may be aggravated by SIBO
  • Have unexplained digestive symptoms as well as vague symptoms such as fatigue, headaches and joint pains




Booking Reschedule Request

If you wish to reschedule your appointment, please fill out the reschedule booking request form below.

Booking Re-schedules need to be approved and are processed manually. You will receive confirmation of your rescheduled booking once processed.

If you would rather cancel your appointment, then please close this form and select Consultation Cancel Request from the menu.

Booking Cancellation Request

If an appointment is cancelled with less than 24 hours-notice 50% fee will be incurred. If an appointment is not attended a 100% fee will be charged.

If an appointment is cancelled with less than 24 hours-notice by Embracing Nutrition, a 50% reduction of your next appointment will be made.