Meet a hero of your microbiome · 1 of 6

Guardian
Faecalibacterium

Your microbiome’s guardian of balance

Faecalibacterium is one of the microorganisms often found in a healthy gut microbiome. It is linked to the fermentation of dietary components and the production of short-chain fatty acids, including butyrate.

It does not act alone. It is part of a whole ecosystem in which other bacteria, diet, lifestyle and the relationships between microorganisms matter too.

02 · Before you meet the hero…

Before you meet the Guardian, meet his world.

Your microbiome is a huge community of microorganisms living in your digestive tract. Bacteria do not act individually — they form a complex network of relationships.

Some ferment fibre, others use what other microorganisms produce, yet others are linked to the mucus layer or metabolic processes.

That is why at GutLoop we never look at one bacterium in isolation. We look at the whole ecosystem.

  • Diet
  • Microbiome
  • Metabolites
  • Gut environment
  • Body

A simplified diagram. The real microbiome is thousands of species and millions of relationships.

03 · Who is the Guardian?

Meet Faecalibacterium

Faecalibacterium is one of the important members of the gut microbiome. Its presence is linked to fermentation processes and the production of short-chain fatty acids.

Butyrate is of particular interest — a metabolite produced, among others, by bacteria that use fibre.

His superpower?
Helps turn dietary components into metabolites that are part of the communication between the microbiome and the body.

The Guardian is a communication layer. We describe the taxon, processes and relationships according to the literature — the presence of one bacterium never tells the whole story.

04 · How does he work?

The Guardian needs the right environment

  • Dietary fibre
  • Fermentation
  • Faecalibacterium
  • Metabolites, e.g. butyrate
  • Gut environment

This is one example of how diet, the microbiome and metabolites are connected.

05 · What suits him?

What does the Guardian like?

These foods provide components the microbiome can use. Not “eat X to increase Faecalibacterium”.

✓

Fibre diversity

Vegetables, fruit, pulses, wholegrains and other fibre sources provide substrates the microbiome uses.

✓

Plant foods

A variety of plant foods increases the variety of components available to the microbiome.

✓

A varied diet

The microbiome benefits not from one “superfood” but from the whole dietary environment.

06 · What may not suit him?

What may not suit him?

There is no single list of foods that “kill” Faecalibacterium. The microbiome is shaped by your whole diet, lifestyle, medicines and many other factors.

✕

A long-term monotonous diet

May mean fewer varied substrates available to the microbiome.

✕

Little fibre

Limits the availability of some components used in fermentation.

✕

Antibiotic treatment

Antibiotics can significantly change the composition and function of the microbiome, and the response is individual.

07 · Relationships with other inhabitants

The Guardian does not act alone.

Microorganisms coexist and interact through competition for nutrients, metabolic cooperation and the compounds they produce.

Dietary fibre can be used by different bacteria, and their products by others. Faecalibacterium is one link in this network.

It is exactly these relationships that interest us most.

GUT·DIET·MAP
These are exactly the relationships our knowledge map helps us chart: bacterium ↔ metabolite ↔ food.

Roseburia

Mason

Bifidobacterium

Chef

Faecalibacterium

Guardian

08 · Which areas might he be linked to?

Where might it matter?

We don’t claim Faecalibacterium “cures” anything. We show in which areas science studies its links with how the body works.

01

Digestion and gut comfort

Faecalibacterium is linked to fibre fermentation and SCFA production, so it is part of the processes taking place in the gut environment.

02

Gut barrier and immunity

Metabolites produced by the microbiome are studied in relation to the gut barrier and immune response.

03

Metabolism

Faecalibacterium and microbiome metabolites are also studied in the context of metabolic processes.

04

Body weight

Microbiome composition and its metabolites are studied in relation to metabolism and body weight, but the presence of one bacterium cannot predict whether someone will lose weight.

09 · What does your result show?

What does your result show?

In the test we check whether Faecalibacterium is present in your microbiome profile and how its relative abundance compares with the adopted interpretation range.

The level of one bacterium alone does not say whether your microbiome is “good” or “bad”. We interpret it together with other microorganisms, indicators and information about you.

Lower abundance

Detected in lower relative abundance than the adopted reference range. A signal worth interpreting together with the rest of your profile and how you eat.

Typical abundance

Within the adopted reference range. One element of your profile — it does not in itself mean everything is “perfect”, just as lower abundance does not mean disease.

Higher abundance

Higher relative abundance in your profile. It does not automatically mean a benefit or a problem — we interpret it in the context of the whole ecosystem.

The bar only illustrates the three interpretation ranges, not your result. We define the reference range from population data and our research; it may be updated.

10 · What can you do with it?

Your result is the beginning. Not the end.

The result alone does not tell you what to do. That is why GutLoop combines information about your microbiome with your diet, goals and lifestyle to point to areas you can support.

Not “do X because you have little Faecalibacterium”. It is about conditions that favour the whole ecosystem.

Example type of recommendation — if your profile points to an area worth supporting

  • 🌱 More fibre diversity
  • 🥦 A wider variety of vegetables
  • 🫘 More fibre sources: pulses, seeds, nuts
  • 🌾 Wholegrain products
  • 🔄 Gradual dietary changes

Illustrative example. GutLoop recommendations depend on the whole profile, questionnaire, goals and lifestyle, not on the level of one bacterium.

Faecalibacterium

Your Guardian

Presence detected
Relative abundance [level]
Context [interpretation]
11 · The Guardian in your app

This is how the Guardian appears in your GutLoop

After the test you will see your individual microbiome profile in the app — not only the Guardian’s presence, but also its context and personalised guidance.

  • Your result · presence and relative abundance of Faecalibacterium in your profile.
  • Interpretation · what this element may mean in the context of your whole microbiome.
  • Related areas · Fibre fermentation · Butyrate · SCFA
  • Recommendations · always in the context of the whole profile.

This is not a separate “bacterium rating”. It is part of your individual microbiome profile.

The hero’s story · 0:45 · video coming soon

12 · A short story

Meet the Guardian

“Hi. I’m the Guardian. I don’t watch over your gut alone. In my work the whole team counts. I feel best when varied fibre shows up in your diet. Then, together with the other inhabitants of the microbiome, we can take part in fermentation and metabolite production. Want to see what my profile looks like in you? Test your microbiome.”

The film is a storytelling layer. It is a simplified way of talking about biology — the real microbiome is far more complex.

13 · Knowledge base

Want to go deeper?

Articles linked to the hero: science without shortcuts, in language you can understand.

Diet and the microbiome

Butyrate — a metabolite with many roles

What is produced during fibre fermentation and why scientists talk about it so much.
Coming soon

Microbiome

Fibre and the gut microbiome

Why a variety of fibre sources matters more than one “superfood”.
Coming soon

Health and the microbiome

Microbiome and immunity — what do we really know?

Gut barrier, metabolites and the immune system: the state of research, without promises.
Coming soon

14 · Now get to know your microbiome

You don’t have to know the names of all the bacteria. We help you understand what your data means.

Test your microbiome. See your profile. Get recommendations. Watch the changes. And when you are ready — check again. Your microbiome is more than six heroes: it is a huge community of microorganisms and millions of relationships.