Akkermansia muciniphila is naturally present in many people, but current research does not support saying that every person has detectable Akkermansia at all times.
This article is part of the AKK Knowledge Centre, our guide hub for Akkermansia, gut health and microbiome research.
It is considered a common member of the human intestinal microbiome and is often detected in healthy adults. Some scientific reviews estimate that Akkermansia can account for roughly 1–4% of faecal microbiota in healthy adults, although the actual amount varies widely between individuals.
Akkermansia abundance can also change:
- with age,
- between populations,
- over time within the same person,
- according to diet and lifestyle,
- with medication and health status,
- and depending on how the microbiome is measured.
So the scientifically accurate answer is:
Akkermansia is common, but it is not detected in every person or every sample, and there is no single Akkermansia level that defines a healthy gut.
Key Takeaways
- Akkermansia is a naturally occurring member of the human gut microbiome.
- It becomes increasingly detectable during early childhood.
- Most adults in many studied populations carry detectable Akkermansia, but not everyone does.
- Akkermansia abundance varies greatly between individuals.
- Levels can also fluctuate within the same person over time.
- Different strains of Akkermansia can appear or disappear within one individual.
- Stool-test results depend partly on the testing method and the sample collected.
- Low or undetectable Akkermansia does not automatically mean someone is unhealthy.
- Higher Akkermansia does not automatically mean better health.
How Common Is Akkermansia in Humans?
Akkermansia is generally regarded as a common human gut bacterium.
It lives primarily in the mucus-associated environment of the large intestine and is frequently detected in stool samples from healthy adults.
Modern reviews describe it as an important member of the normal gut microbiota, while recent literature estimates that it may represent approximately 1–4% of the faecal microbial community in many healthy adults.
But averages can be misleading.
One individual may have relatively high Akkermansia abundance.
Another healthy individual may have:
- much less,
- temporarily undetectable levels,
- or different Akkermansia strains.
This is normal in microbiome research.
The gut microbiome is highly individual.
Are Babies Born With Akkermansia?
Akkermansia levels appear to become established progressively during early life rather than immediately reaching adult-like abundance after birth.
An often-cited study following infants found detectable Akkermansia-related bacteria in approximately:
- 16% at one month of age,
- 72% at six months,
- and 90% at twelve months.
The amount also increased as the infants became older.
Other studies have similarly observed an increase in Akkermansia abundance during the first years of life.
This fits the broader development of the gut microbiome.
A baby's intestinal ecosystem changes rapidly as a result of:
- birth,
- breastfeeding or formula feeding,
- introduction of solid foods,
- environmental exposure,
- antibiotics,
- and maturation of the gastrointestinal tract.
By early childhood, the microbiome begins becoming more similar to the complex community seen in adults.
Akkermansia appears to be part of this developmental process.
Does Almost Every Adult Have Akkermansia?
Many adults probably carry Akkermansia, but the word “everyone” is too strong.
Scientific studies do not detect the bacterium in every participant.
Part of the reason is biological variation.
Part is also technical.
Different sequencing methods can produce different detection rates.
This does not mean a person without detectable Akkermansia necessarily lacks it completely.
It demonstrates an important point:
“Not detected” and “completely absent from the intestine” are not necessarily the same thing.
Detection depends on:
- how much bacteria are present,
- where the sample came from,
- how the sample was stored,
- DNA-extraction procedures,
- sequencing depth,
- and the analytical method.
Can Akkermansia Levels Change in the Same Person?
Yes.
Akkermansia abundance is not necessarily a fixed personal number.
Longitudinal studies have found substantial fluctuations in Akkermansia relative abundance over time, including periods described as “short-term blooms”, where Akkermansia increased rapidly and later declined again.
This means someone could potentially take two microbiome tests at different times and receive substantially different Akkermansia results.
That does not necessarily mean their health dramatically improved or deteriorated between those tests.
Microbial ecosystems naturally fluctuate.
Can the Type of Akkermansia Change Too?
Potentially, yes.
Akkermansia is not one genetically identical organism across every human.
There are different strains and genomic lineages.
Longitudinal research suggests different Akkermansia lineages can appear at different time points within an individual.
This suggests that Akkermansia ecology may involve:
- strain competition,
- recurrent colonisation,
- strain replacement,
- and potentially transmission between people or environments.
Does Akkermansia Change With Age?
Yes, although the pattern is not perfectly simple.
Akkermansia generally becomes more established during infancy and childhood.
After adulthood, research has reported different patterns depending on the population studied.
Interestingly, several studies of very old adults and centenarians have reported relatively high Akkermansia abundance.
However, this does not prove:
Akkermansia causes longevity.
Akkermansia could be contributing to the microbial ecosystem, responding to that ecosystem, serving as a marker, or participating in several interconnected processes.
Does Geography Affect Akkermansia?
Probably.
Human microbiomes differ substantially across geographic regions and lifestyles.
Factors including geography, culture, dietary patterns, age, environment and technical study methods can influence observed microbiome composition.
This makes it difficult to define one global “normal” value.
Why Might One Person Have More Akkermansia Than Another?
There is no single cause.
Researchers are studying influences including:
Diet
Diet changes the nutrients available to the microbiome.
Age
The microbiome changes dramatically from infancy through adulthood and later life.
Medication
Antibiotics can alter the intestinal microbial community, as can other medications.
Metabolic and Health Status
Many observational studies report relationships between Akkermansia abundance and particular health characteristics.
But association is not causation.
The Existing Microbiome
Akkermansia competes and cooperates with other microorganisms.
The Intestinal Mucus Environment
Because Akkermansia specialises in mucin utilisation, changes in mucus production and composition may influence its ecological niche.
Individual Biology
Host genetics, immune activity and intestinal physiology may all contribute.
Does Low Akkermansia Mean Something Is Wrong?
Not necessarily.
A low Akkermansia result from a stool test should not automatically be interpreted as:
- poor gut health,
- metabolic disease,
- a damaged intestinal barrier,
- inflammation,
- or a need for supplementation.
There is currently no universally accepted clinical rule stating:
Below X% Akkermansia = unhealthy.
The microbiome is too complex for that interpretation.
Does High Akkermansia Mean You Are Healthier?
Again, not necessarily.
It is tempting to turn microbiome testing into a score:
Low AKK = bad High AKK = good
Modern research suggests that this is too simplistic.
The surrounding environment matters.
Can Akkermansia Completely Disappear and Return?
Possibly, at least from the perspective of measurable stool abundance.
Longitudinal research shows that Akkermansia can move above and below detection thresholds over time.
Different strains may also appear at different sampling points.
A single stool sample cannot perfectly distinguish whether Akkermansia is absent, present at very low abundance, or poorly represented in that particular sample.
Can a Stool Test Tell Me How Much Akkermansia Is in My Gut?
It can provide an estimate, but it has limitations.
Most commercial microbiome tests analyse stool.
But Akkermansia is strongly associated with the intestinal mucus layer.
A stool sample does not directly collect microbes from every region of the colon or from the entire mucus surface.
A stool test is therefore a snapshot, not a complete map of the gut microbiome.
Should You Take an Akkermansia Supplement If Your Test Says “Low”?
A single microbiome-test result is not enough to answer that question.
Consumer microbiome testing can be interesting and educational.
But it should not be treated as a standalone medical diagnosis.
What About People With No Detectable Akkermansia?
If Akkermansia is not detected in a stool sample, it does not automatically mean that something needs to be “fixed.”
Microbiome health depends more on the overall function and stability of the ecosystem than on the presence of one fashionable species.
What Current Science Does Not Know Yet
Scientists still do not know:
- the ideal Akkermansia abundance for an individual,
- whether such an ideal level even exists,
- how stable Akkermansia should be over time,
- which strains are most relevant to particular outcomes,
- whether strain replacement matters clinically,
- exactly how geography influences colonisation,
- how much consumer stool tests reflect mucus-associated populations,
- or which people would benefit most from changing Akkermansia abundance.
Frequently Asked Questions
Does everyone have Akkermansia?
No scientific evidence supports saying that every person has detectable Akkermansia at all times.
What percentage of the gut microbiome is Akkermansia?
Some modern reviews describe Akkermansia as accounting for approximately 1–4% of faecal microbiota in healthy adults, but individual levels vary considerably.
At what age does Akkermansia appear?
It can appear during infancy.
Can Akkermansia levels change over time?
Yes.
Can different Akkermansia strains live in the same person?
Research indicates substantial strain diversity, and longitudinal studies suggest different lineages can appear at different times within individuals.
Is low Akkermansia bad?
Not automatically.
Is high Akkermansia always good?
No.
Can a stool test accurately measure Akkermansia?
It can estimate its relative abundance in the sampled stool, but the result is influenced by sampling and analytical methods.
Should I supplement Akkermansia if my stool test shows none?
A single consumer microbiome result is not enough to determine whether supplementation is appropriate.
The Bottom Line
So, is Akkermansia muciniphila naturally present in everyone?
Probably not in a way that can be consistently detected in every person at every moment.
Akkermansia is a common natural member of the human gut microbiome and becomes increasingly established during early childhood.
But its abundance varies substantially between people, populations, ages and even within the same individual over time.
Most importantly:
A low Akkermansia result does not automatically mean poor health, and a high result does not automatically mean excellent gut health.
Continue Learning
- Can Diet Support Akkermansia?
- Does more microbiome diversity mean a healthier gut?
- What the gut microbiome is
Selected Scientific References
- Geerlings SY, Kostopoulos I, de Vos WM, Belzer C. Akkermansia muciniphila in the Human Gastrointestinal Tract: When, Where, and How? Microorganisms. 2018.
- Ioannou A, Berkhout MD, Geerlings SY, et al. Akkermansia muciniphila: biology, microbial ecology, host interactions and therapeutic potential. Nature Reviews Microbiology. 2025.
- Han N, Peng X, Qiang Y, et al. Strain-level dynamics of Akkermansia muciniphila in the human gut microbiota. AMB Express. 2025.
- Collado MC, Derrien M, Isolauri E, de Vos WM, Salminen S. Intestinal Integrity and Akkermansia muciniphila, a Mucin-Degrading Member of the Intestinal Microbiota Present in Infants, Adults, and the Elderly. Applied and Environmental Microbiology. 2007.
Educational Disclaimer
This article is provided for general educational purposes only. It is not intended to diagnose, treat, cure or prevent any disease and does not replace advice from a qualified healthcare professional.