How do I know if I have SIBO? Symptoms

What is SIBO and how do I know if I have it?

Do you bloat after eating, have gas, discomfort or even mental fog? Maybe you've been told it's “stress” or “irritable bowel”, but... it could be SIBO.

SIBO (small intestinal bacterial overgrowth) is an increasingly common - and still under-diagnosed - cause of persistent digestive symptoms. It affects your well-being, your energy and your daily life. The good news is that it can now be detected at home, with a simple, convenient and scientifically validated test.

At Ailin, we want to help you understand what is happening in your body and give you the tools to regain your wellbeing.

What is SIBO?

SIBO stands for Small Intestinal Bacterial Overgrowth, or small intestinal bacterial overgrowth. It occurs when bacteria that normally live in the colon colonise the small intestine in excess, where they should not be. This imbalance alters digestion, ferments food prematurely and causes intense symptoms that we often confuse with other digestive conditions.

sibo home test

Most common symptoms of SIBO

  • Abdominal swelling
  • Gases (foul-smelling and constant)
  • Diarrhoea or constipation
  • Colicky abdominal pain
  • Mental fog, fatigue
  • Feeling of fullness with little food
  • Food intolerances

Many of these symptoms also appear in food intolerances or irritable bowel syndrome (IBS), so it is essential to do a specific test to accurately identify IBS.

How do I know if I have SIBO?

SIBO is diagnosed by means of an exhaled air test, a non-invasive, convenient and scientifically validated technique. It consists of swallowing a lactitol solution, a type of sugar that is not absorbed in the intestine. From then on, you have to exhale in small tubes at regular intervals for about three hours.

What is analysed are the hydrogen and methane levels in exhaled air, as these gases are produced by bacteria when they ferment carbohydrates in the small intestine. If there is bacterial overgrowth, gas levels are elevated higher than normal, allowing a diagnosis to be clearly and accurately confirmed.

With the Ailin SIBO test, this whole process can be done at home. The kit includes detailed and clear instructions, as well as accompaniment throughout the entire procedure by our team. Once the samples have been taken, they are collected from your home and sent directly to a specialised laboratory.

In a few days, you will receive your results designed to make it easy for you to understand and make informed decisions about your health.

Unlike other methods, the Ailin's SIBO test is designed to offer a 100% experience at home, eliminating the need to travel or face endless waiting lists. You can do it all from home, at your own pace and with the peace of mind of professional support.

Another important advantage is that this test analyses both hydrogen and methane, which allows for a more complete and accurate assessment of bacterial overgrowth. In addition, you will not only receive a technical result, but also a clear and understandable graph, designed so that anyone - with or without medical knowledge - can understand what is going on in their body.

And if you need it, you can also access to a optional medical consultation with one of our digestive specialists, The Ailin test is a tool that will help you to interpret the results and define the next steps. No waiting lists, no barriers, and with the comfort and quality that define Ailin.

Sibo test at home

What happens if you don't treat it?

Untreated SIBO can become chronic and profoundly affect your health. It can cause malnutrition, weight loss, systemic inflammation and mood problems. It is also associated with hormonal imbalances, autoimmune diseases and skin problems.

Listening to your body is the first step. Don't normalise what is not normal.

Conclusion: Your body speaks. This test translates it.

If you have been feeling unwell for some time without finding clear answers, this test can help you understand what is really going on. Knowing if you have SIBO is the first step to regaining your wellbeing.

Do it from home, in comfort, without judgement and with the support of a team that accompanies you.

References:

1. Tansel A, Levinthal DJ. Understanding our tests: Hydrogen-methane breath testing to diagnose small intestinal bacterial overgrowth. Clin Transl Gastroenterol [Internet]. 2023;14(4):e00567. Disponible en: http://dx.doi.org/10.14309/ctg.0000000000000567

2. Rezaie A, Buresi M, Lembo A, Lin H, McCallum R, Rao S, et al. Hydrogen and methane-based breath testing in gastrointestinal disorders: The north American consensus. Am J Gastroenterol [Internet]. 2017;112(5):775-84. Available at: http://dx.doi.org/10.1038/ajg.2017.46

Kashyap P, Moayyedi P, Quigley EMM, Simren M, Vanner S. Critical appraisal of the SIBO hypothesis and breath testing: A clinical practice update endorsed by the European society of neurogastroenterology and motility (ESNM) and the American neurogastroenterology and motility society (ANMS). Neurogastroenterol Motil [Internet]. 2024;36(6):e14817. Available at: http://dx.doi.org/10.1111/nmo.14817

4. Alcedo González J, Estremera-Arévalo F, Cobián Malaver J, Santos Vicente J, Alcalá-González LG, Naves J, et al. Common questions and reasoned answers about intestinal bacterial overgrowth syndrome (IBOS). Gastroenterol Hepatol [Internet]. 2025;48(2):502216. Available at: http://dx.doi.org/10.1016/j.gastrohep.2024.502216

Share on:

Discover new content

What is the difference between STIs and STDs?

How do I know if I have an STD?

Why do we include it in this test?
What other tests are you undergoing?
Discount coupon of 5% available: #ADS05
10% discount coupon available: AILINSOCIAL