What Can Affect Akkermansia Levels?

Akkermansia muciniphila levels can vary substantially from one person to another — and even within the same person over time.

This article is part of the AKK Knowledge Centre, our guide hub for Akkermansia, gut health and microbiome research.

Diet is one factor, but it is far from the only one.

Researchers are investigating how Akkermansia abundance may be influenced by:

• diet and dietary fibre,
• plant polyphenols,
• prebiotics,
• medications,
• antibiotics,
• physical activity,
• age,
• metabolic health,
• the intestinal mucus environment,
• other gut microorganisms,
• bacterial strain differences,
• geography and lifestyle,
• and ordinary day-to-day microbiome variation.

Importantly, not every factor has the same level of scientific evidence.

Some relationships have been observed repeatedly in humans.

Others come mainly from animal or laboratory research.

And even when two things are associated, that does not prove that one directly caused the change in Akkermansia.

The most accurate way to think about Akkermansia is therefore not as a fixed “gut score,” but as one changing member of a complex microbial ecosystem.

Key Takeaways

• Akkermansia levels can differ greatly between individuals.
• Levels can also rise and fall within the same person over time.
• Diet can influence Akkermansia, but responses depend on the type of food, fibre or polyphenol and the individual's existing microbiome.
• Some medications, including metformin, have been associated with changes in Akkermansia, but drug effects are not always consistent across studies.
• Antibiotics can reshape Akkermansia populations in unpredictable ways rather than simply eliminating them.
• Exercise may influence Akkermansia, but human studies currently show mixed results.
• Age, metabolic status and geography are associated with differences in Akkermansia abundance.
• Sleep and stress may affect the broader microbiome, but direct human evidence showing a predictable effect specifically on Akkermansia remains limited.
• There is currently no universally accepted “ideal” Akkermansia level.

1. Diet

Evidence level: Moderate human evidence, but highly variable

Diet is one of the most important environmental influences on the gut microbiome.

Changing what we eat changes:

• the nutrients reaching the colon,
• microbial fermentation,
• short-chain fatty acids,
• intestinal transit,
• microbial competition,
• and potentially the mucus environment in which Akkermansia lives.

But Akkermansia is unusual.

Unlike many fibre-fermenting bacteria, it is especially adapted to using mucin-derived carbohydrates found within the intestinal mucus layer.

This means dietary effects on Akkermansia may often be indirect.

So:

Diet matters, but there is no universal Akkermansia diet.

2. Dietary Fibre

Evidence level: Important for overall gut health; mixed for Akkermansia specifically

Dietary fibre strongly influences the gut microbiome.

However, it would be inaccurate to say:

“More fibre always means more Akkermansia.”

Different fibres have different chemical structures and feed different microbial networks.

Fibre remains important for overall gut ecology, but consumers should avoid treating it as a guaranteed Akkermansia booster.

3. Prebiotics

Evidence level: Emerging human evidence

Prebiotics are substrates selectively used by microorganisms in ways that can provide a health benefit.

Researchers are increasingly testing whether targeted prebiotic combinations can promote specific microorganisms such as Akkermansia.

In 2026, a randomized controlled trial involving 70 participants tested a prebiotic formula designed specifically to promote Akkermansia muciniphila over eight weeks.

Prebiotics may therefore become an important strategy.

But the same formula may not produce the same effect in everyone.

Baseline microbiome composition matters.

4. Polyphenols

Evidence level: Promising, with some human support

Polyphenols are plant compounds found in foods such as grapes, berries, tea, cocoa, pomegranate, herbs, fruits and vegetables.

Some human interventions have reported increases in Akkermansia after polyphenol-rich dietary interventions.

Others have found no significant change.

The response seems to depend on the polyphenol source, dose, duration, food matrix, other nutrients and the participant's starting microbiome.

5. The Existing Gut Microbiome

Evidence level: Strong biological rationale

Akkermansia does not live alone.

The human colon contains hundreds of microbial species competing and cooperating with one another.

This means two people eating the same food can experience different Akkermansia responses because they begin with different microbial ecosystems.

The starting microbiome can influence the response to an intervention.

6. The Intestinal Mucus Environment

Evidence level: Strong mechanistic evidence

Akkermansia's main ecological niche is the mucus-associated environment of the large intestine, which is why where Akkermansia lives in the gut matters for interpreting abundance.

Its abundance is therefore closely tied to the availability and composition of mucin.

7. Medications

Evidence level: Strong evidence that medications can alter the microbiome; Akkermansia effects vary by drug

Medications are an important but often overlooked influence on gut microbiome composition.

One of the best-known examples involving Akkermansia is metformin.

Some human studies have associated metformin use with higher relative abundance of Akkermansia muciniphila.

However, medication–microbiome effects can depend on population, study design, dose and baseline microbiome.

8. GLP-1 and Other Metabolic Medications

Evidence level: Early human evidence

Small human studies have reported differences in gut microbial composition between people receiving different metabolic medications, including changes involving Akkermansia.

This is interesting, but it should not be interpreted as:

“GLP-1 drugs increase Akkermansia.”

9. Antibiotics

Evidence level: Strong microbiome effect; Akkermansia response can be unpredictable

Antibiotics can dramatically alter the intestinal microbiome.

But their effect on Akkermansia is not as simple as:

antibiotics = less Akkermansia.

Broad-spectrum antibiotic treatment can sometimes reduce competing bacteria and temporarily leave Akkermansia relatively more abundant.

The larger lesson is:

Antibiotics can restructure microbial ecology in unexpected ways.

Never stop, avoid or change a medically necessary antibiotic simply to protect one gut bacterium.

10. Physical Activity and Exercise

Evidence level: Mixed human evidence

Exercise is frequently described online as a way to increase Akkermansia.

A 2024 systematic review analysed 13 human studies involving 522 participants together with nine animal studies.

Among the human studies:

• 6 reported increased Akkermansia,
• 5 reported decreased Akkermansia,
• and 2 reported no significant difference.

By contrast, eight of nine rodent studies reported increases.

So the responsible conclusion is:

Regular exercise is beneficial for many aspects of health and may influence Akkermansia, but exercise should not currently be prescribed as a reliable way to raise one specific bacterium.

11. Physical Inactivity

Evidence level: Emerging human evidence

Prolonged inactivity has been associated with changes in gut microbial diversity and may reduce certain bacteria, including Akkermansia, in some studies.

But it still does not establish a universal dose-response relationship.

12. Body Weight and Metabolic Health

Evidence level: Strong observational associations; causality remains complex

Numerous studies have reported lower average Akkermansia abundance in groups with obesity, insulin resistance, type 2 diabetes and other metabolic disturbances.

But this does not tell us which direction the relationship works.

It is an association, not a diagnostic test.

13. Age

Evidence level: Good observational human evidence

Akkermansia abundance changes during the human lifespan.

It is detected in some infants within the first weeks or months after birth and becomes more common as the gut microbiome develops.

It is widely detected in adults.

Some studies have also reported relatively high Akkermansia abundance in certain elderly and long-lived populations.

14. Geography and Lifestyle

Evidence level: Strong for overall microbiome differences; Akkermansia-specific interpretation remains complex

Human microbiomes differ substantially around the world.

People living in Singapore, Japan, China, Europe, North America, rural environments and highly urbanised environments can have different microbial profiles.

This means an Akkermansia reference range derived from one country should not automatically become a universal global target.

15. Akkermansia Strain Differences

Evidence level: Increasingly important

One of the biggest changes in Akkermansia science is the growing recognition that:

not all Akkermansia is genetically identical.

Different strains can differ in characteristics such as oxygen tolerance, epithelial adhesion, nutrient metabolism, aggregation and ability to compete within the gut.

16. Akkermansia Can Change Over Time Without an Obvious Intervention

Evidence level: Direct longitudinal human evidence

Longitudinal research has observed substantial fluctuations in Akkermansia abundance, including temporary “short-term blooms” where Akkermansia rapidly increased and later declined.

Different Akkermansia strains can also replace one another within the same individual.

This means:

Akkermansia is dynamic.

17. Sleep

Evidence level: Limited for Akkermansia specifically

Poor sleep and circadian disruption are increasingly associated with changes in the overall gut microbiome.

However, direct human evidence showing that better sleep reliably increases Akkermansia is currently insufficient.

18. Stress

Evidence level: Mechanistically plausible, direct human AKK evidence limited

Psychological and physiological stress can influence the gastrointestinal system and broader microbiome.

However, direct evidence connecting stress levels to predictable changes specifically in Akkermansia muciniphila remains limited.

Statements such as:

“Stress kills Akkermansia”

are not supported by current evidence.

Which Factors Have the Strongest Evidence?

Factor	Human Evidence for AKK Changes	Overall Interpretation
Diet	Moderate	Important but highly individual
Fibre	Mixed	Supports gut ecology; not guaranteed to raise AKK
Polyphenols	Promising	Some interventions increase AKK, others do not
Targeted prebiotics	Emerging	Growing area of clinical research
Medication	Moderate to strong	Some drugs clearly alter microbiome and may affect AKK
Antibiotics	Strong ecosystem effect	Direction can be unpredictable
Exercise	Mixed	Some increases, some decreases, some no change
Inactivity	Emerging	Prolonged inactivity may reduce AKK
Age	Observational	Levels differ across life stages
Metabolic status	Strong association	Cause and effect remain difficult to separate
Geography	Observational	Population differences are important
Sleep	Limited direct AKK evidence	Broader microbiome relevance
Stress	Limited direct AKK evidence	Biologically plausible but not established
Existing microbiome	Very important	Major source of individual response
Strain variation	Increasing evidence	“Akkermansia” is not biologically uniform

Can You Deliberately Increase Akkermansia?

Possibly.

Research is investigating dietary intervention, prebiotics, polyphenols, exercise, direct live Akkermansia supplementation, pasteurised Akkermansia preparations and combinations of microbiome-targeted ingredients.

But current science does not support increasing Akkermansia as a universal goal.

Should You Change Medication to Increase Akkermansia?

No.

Medication should never be started, stopped or changed merely to manipulate one gut bacterium unless a qualified healthcare professional determines that change is medically appropriate.

Why Your Starting Level Matters

Two people can follow the same intervention and respond differently.

This is why microbiome research increasingly focuses on responders versus non-responders.

Future microbiome interventions may depend less on:

“Does this ingredient increase Akkermansia?”

and more on:

“For whom does it increase Akkermansia, under what conditions, and does that change actually matter?”

What Current Research Does Not Prove

Current evidence does not prove that:

• more fibre always increases Akkermansia,
• all polyphenols increase Akkermansia,
• exercise always raises Akkermansia,
• sleeping eight hours increases Akkermansia,
• stress directly destroys Akkermansia,
• low Akkermansia causes obesity,
• high Akkermansia guarantees metabolic health,
• medications should be used to manipulate Akkermansia,
• or every person should try to maximise Akkermansia.

Frequently Asked Questions

What is the biggest factor affecting Akkermansia levels?

There is no single biggest factor.

Can diet increase Akkermansia?

Some human dietary interventions have increased Akkermansia, but results vary significantly by diet and individual.

Does exercise increase Akkermansia?

Possibly in some people, but human studies are mixed.

Does metformin increase Akkermansia?

Some human observational research has associated metformin use with higher Akkermansia abundance. This should not be interpreted as a reason to take metformin for microbiome purposes.

Do antibiotics reduce Akkermansia?

Not always.

Does stress lower Akkermansia?

There is currently insufficient direct human evidence to say stress reliably lowers Akkermansia.

Does sleep affect Akkermansia?

Sleep and circadian biology affect the broader microbiome, but direct Akkermansia-specific human evidence remains limited.

Can Akkermansia change without changing my diet?

Yes.

Is a higher Akkermansia level always healthier?

No.

The Bottom Line

So, what can affect Akkermansia muciniphila levels?

The answer is:

almost everything that shapes the intestinal ecosystem can potentially influence Akkermansia — but not always in predictable ways.

Among the most important factors currently being studied are:

diet, prebiotics, polyphenols, medications, antibiotics, physical activity, age, metabolic status, the intestinal mucus environment, and the rest of the microbiome.

At the same time, Akkermansia can naturally fluctuate even when there is no obvious lifestyle intervention.

Do not treat Akkermansia as a fixed health score.

Continue Learning

• Is akkermansia naturally present in everyone?
• How sleep, stress and exercise affect gut health
• How dietary fibre supports gut health

Selected Scientific References

1. Ioannou A, Berkhout MD, Geerlings SY, et al. Akkermansia muciniphila: biology, microbial ecology, host interactions and therapeutic potential. Nature Reviews Microbiology. 2025.
2. Aguiar SS, Ribeiro FM, Sousa Neto IV, Franco OL, Petriz B. Effects of physical exercise on Akkermansia muciniphila: a systematic review of human and animal studies. Beneficial Microbes. 2024.
3. de la Cuesta-Zuluaga J, Mueller NT, Corrales-Agudelo V, et al. Metformin Is Associated With Higher Relative Abundance of Mucin-Degrading Akkermansia muciniphila and Several Short-Chain Fatty Acid-Producing Microbiota in the Gut. Diabetes Care. 2017.
4. Han N, Peng X, Qiang Y, et al. Strain-level dynamics of Akkermansia muciniphila in the human gut microbiota. AMB Express. 2025.

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.