SIBO: When Bacteria Grow in the Wrong Place

By Vanessa Manfredini | Biomedical Scientist and Future Nutritionist

Do you eat and, shortly after, your belly bloats like a balloon? Do you experience gas, discomfort, and sometimes it feels like anything you eat upsets you? 🎈 Don't worry, this can have several causes, but there's one that's increasingly prominent and few people know by name: SIBO. And since the gut is my passion, I had to explain it to you! Come with me! 🦠🌿

"Sometimes the problem isn't what you eat, but where the bacteria are growing."

What is SIBO? 🦠

SIBO stands for Small Intestinal Bacterial Overgrowth. It sounds complicated, but the idea is simple: it's when bacteria that should live in the large intestine end up growing too much in the small intestine, where normally very few exist.

Why does this happen? 🤔

Normally, the body controls the amount of bacteria in the small intestine with three allies: good intestinal movement, stomach acid, and the valve that separates the two intestines. When something disrupts this balance, bacteria accumulate. Among the causes and risk factors are:

The Symptoms (and the Great Disguise) 🚨

The most classic symptom is bloating. But it comes with others:

And here's the most important point, the reason SIBO is so topical: its symptoms are almost identical to those of Irritable Bowel Syndrome. Therefore, many people who live with an "irritable bowel" may, in fact, have SIBO behind it. It's worth investigating! 🔍

The Connection with Diet: FODMAPs 🍽️

Now we get to the part I love most! Have you noticed that certain foods, like a serving of beans or lentils, leave your belly bloated and cause strong-smelling gas? For most people, this is normal and temporary. But for those with SIBO, this discomfort is usually much more intense. And there's a beautiful explanation behind it. 😄

There is a group of carbohydrates called FODMAPs (they are highly fermentable carbohydrates). Bacteria simply love these carbohydrates and, by fermenting them, produce a lot of gas. Foods rich in FODMAPs include:

Notice: these foods are healthy and great for most people! The problem arises when there are too many bacteria in the small intestine. Then the fermentation becomes exaggerated, and the result is that balloon of gas and bloating. It's like giving too much food to a crowd that shouldn't be there. 

How Nutrition Helps 🌱

This is where diet comes in as a great ally (along with medical treatment). The most studied strategy is the low-FODMAP diet, which works in phases:

Another point that nutrition addresses is the underlying cause: supporting good intestinal movement, respecting meal intervals, and treating what's behind it. Because if the cause continues, bacteria tend to return.

And Medical Treatment? 💊

When a SIBO diagnosis is confirmed (usually by a breath test that measures hydrogen and methane), treatment typically involves specific antibiotics, prescribed by a doctor, in addition to addressing the underlying cause. Nutrition helps to relieve symptoms and prevent relapses.

"Understanding your body is the first step. The second is to seek the right help, without blaming yourself."

Did this content help you understand? 💚

Tell me in the comments: do you often feel your belly bloat after eating? Had you heard of SIBO before? Save this post and share it with that friend who lives bloated and doesn't know why. Information is care! 🌹