It’s not technically bacteria, but single-celled organisms called archaea, that are responsible for the methane form of SIBO.
Why? When you eat fiber, the bacteria in your gut ferment it and produce hydrogen. And what do archaea feed off? Hydrogen! It is only once the archaea consume the hydrogen that they produce their own by-product: methane. If you have a problem with sibo then you can get natural SIBO treatment from Dr. Houston Anderson.
So, to support a large number of archaea (i.e. an overgrowth), you need to be producing sufficient hydrogen to feed them. Which, if you’ve tested positive for methane SIBO, generally means two things:
1. You also have an overgrowth of bacteria (SIBO) which produce excess levels of hydrogen.
2. Even though you have an overgrowth of hydrogen-producing bacteria, excess hydrogen levels may not show up on your testing as the archaea consume the hydrogen and produce methane instead. So they can remain hidden.
Methane SIBO Symptoms
The symptoms of methane-dominant SIBO are often a lot different from those of hydrogen-dominant SIBO.
> Constipation: discussed in more detail below, methane gas slows down transit time and causes constipation in most of those who test positive for methane SIBO.
> Bloating and Gas: bloating is probably the most common and noticeable symptom of methane SIBO. While the archaea consume the hydrogen gas which might theoretically reduce total gas volume, our experience clinically is that methane SIBO clients tend to have more sustained bloating.
> Unexplained weight gain: discussed in detail below, the archaea responsible for methane SIBO are also known as obesogens that help the body extract additional calories from our diet.