Akkermansia muciniphila is a gram-negative bacterium that lives in the mucus layer lining the human colon, typically accounting for more than 1% of a healthy adult gut microbiome. Unlike many better-known probiotics, Akkermansia does not simply pass through: it actively degrades and renews the mucus layer, reinforces tight junctions between intestinal cells, and, in cell and mouse studies, its outer-membrane protein Amuc_1100 has been shown to influence immune signaling and metabolism; a link to GLP-1 is a hypothesis that needs human proof [14][15][16]. These roles have drawn serious scientific attention over the past decade, particularly in the context of insulin sensitivity, intestinal barrier integrity, and systemic inflammation.
What makes this bacterium relevant to longevity research is a mixed set of observations: in mice its abundance fell progressively with age, but human findings conflict, with one study finding less Akkermansia in young adults than in elderly people and another finding less in centenarians than in younger elderly people. Whether any age-related change is a driver of aging or a downstream consequence remains an active research question. Studies of centenarians disagree: Akkermansia was enriched in the three largest cohorts of long-lived people and in Sardinian centenarians, but comparable across age groups in one study [6][7][8][1][2]. This article reviews what the current evidence says, what mechanisms have been proposed, and where the science still has significant gaps.
Key Takeaways
- Akkermansia muciniphila is a mucus-layer bacterium comprising more than 1% of a healthy adult gut microbiome, with proposed roles in intestinal barrier integrity, GLP-1 secretion, and inflammation regulation.
- Akkermansia was enriched in the three largest cohorts of long-lived people and in Sardinian centenarians, but it was comparable across age groups in one study and lower in Chinese centenarians in another; these are observational findings and do not establish causation [1][2][7][8].
- In aged mice, selenium deficiency accelerated age-related gut microbial changes, with Akkermansia enriched in males, alongside diabetes-like symptoms [3].
- Preclinical evidence links Akkermansia enrichment to reduced brain IL-6 and improved cognitive function in aged animals, suggesting a gut-brain axis mechanism, but human clinical data are limited [4].
- Fiber, polyphenols and caloric restriction have been linked to higher Akkermansia abundance, mostly in mice or small human studies, and few diet trials have measured it, so no dietary lever for keeping Akkermansia levels as people age is firmly established [9][10][11][12][13].
What Akkermansia muciniphila Does in the Gut
Akkermansia muciniphila colonizes the outer mucus layer of the colon, where it uses mucin glycoproteins as a carbon and nitrogen source. Counterintuitively, this degradation appears to stimulate the host to produce more mucus rather than simply depleting it, helping maintain the thickness and integrity of the mucus barrier. A thicker, denser mucus layer reduces translocation of bacterial products, including lipopolysaccharide, into circulation, which is one proposed route by which low Akkermansia abundance may contribute to the low-grade systemic inflammation that characterizes aging, often called inflammaging.
The bacterium’s outer-membrane protein Amuc_1100 has attracted particular interest because it can interact with toll-like receptor 2 on intestinal epithelial cells independently of live bacteria. In cell and mouse studies, this interaction has been linked to upregulation of tight-junction proteins and improvements in gut barrier and metabolic measures; the evidence for the isolated protein comes from cells and mice [17][15][18]. These are proposed mechanisms, not established clinical treatments, and the size and duration of human trials remain limited.
How and Why Akkermansia Declines with Age
The gut microbiome shifts substantially across a lifespan. In older adults, overall diversity tends to decrease, facultative anaerobes become more prevalent, and several obligate anaerobes associated with health tend to contract, though human data on Akkermansia itself conflict [7][8]. The reasons are multifactorial: reduced mucus production, altered intestinal motility, changes in dietary fiber intake, increased use of medications such as antibiotics and proton-pump inhibitors, and shifts in immune surveillance of the mucosal surface all likely play a role.
Research note: In community-dwelling older adults, higher Akkermansia was associated with fewer age-related memory T cells (TEMRA), a marker of immune aging [19].
A 2025 study examining telomere-humanized aged mice found that dietary selenium deficiency significantly accelerated these aging-related gut microbial changes, with Akkermansia muciniphila identified as the most prominently affected taxon, and one that was enriched in aged male mice with severe insulin resistance [3]. While mouse models do not translate directly to human aging trajectories, the finding adds to a growing body of evidence that micronutrient status can modulate how quickly age-related microbial decline occurs, and that Akkermansia may sit at a metabolic crossroads in this process.
Centenarians and Longevous Populations: What the Research Shows
Some of the most intriguing evidence connecting Akkermansia to longevity comes from studies of people who have lived to 100 or beyond in good health. A 2024 meta-analysis examining gut microbiome signatures across multiple longevous populations found consistent enrichment of certain bacterial taxa in centenarians compared to younger elderly controls, with Akkermansia among the organisms showing notable relative abundance in the longest-lived individuals [1]. The authors noted that while these signatures cannot establish causation, healthy centenarians may maintain Akkermansia because of overall robust physiology rather than because Akkermansia drives longevity, enrichment in the three largest long-lived cohorts is notable, though other studies disagree [1][7][8].
A separate study focused on healthy Sardinian centenarians, a population long studied for exceptional longevity, found that gut microbiota markers including Akkermansia muciniphila were associated with both extreme age and dietary patterns rich in plant-based foods and legumes [2]. The authors highlighted that dietary habits and microbial composition were intertwined, making it difficult to isolate whether microbiome composition, diet, genetics, or some combination of all three underlies the observed longevity. This kind of honest qualification is important: centenarian microbiome studies are observational by nature and should be interpreted cautiously.
Not every study agrees. One study found Akkermansia amounts comparable between centenarians and other age groups, and Chinese centenarians had significantly lower relative abundance of Akkermansia than younger elderly people; the authors of the latter study say whether the decrease relates to aging and longevity needs further investigation. Another study found young adults had significantly less Akkermansia than elderly people [7][8].
Taken together, these findings do not prove that boosting Akkermansia extends human lifespan. What they suggest is that this bacterium is a recurring but not universal feature of microbiomes in very old age [1][7][8]which makes understanding what supports or depletes it a reasonable scientific and public-health question.
Akkermansia, Neuroinflammation, and Cognitive Health in Aging
Inflammaging (the chronic, low-grade systemic inflammation that accumulates with age) is increasingly recognized as a contributor to cognitive decline as well as metabolic disease. Interleukin-6 (IL-6) is one of the key proinflammatory cytokines elevated in aging brains, and it has been associated with reduced neuroplasticity and accelerated cognitive decline in older adults.
A 2023 study in aged mice found that Akkermansia muciniphila, enriched in the gut microbiota by the diabetes medication metformin, was associated with improved cognitive function and reduced brain IL-6 levels [4]. The researchers proposed that Akkermansia may help dampen neuroinflammation through gut-brain axis signaling, though the precise mechanisms and whether these results translate to humans remain to be established. This is early-stage mechanistic work, not clinical evidence that Akkermansia supplements improve human cognition.
A 2025 study examining rice bran peptides in an aging context found that modulating TNF-α, another key proinflammatory cytokine, through dietary interventions was associated with greater gut microbiota stability, including preservation of beneficial taxa, with implications for both gut barrier health and cognitive outcomes [5]. The intersection of inflammation control, microbiome stability, and cognitive resilience in aging is an active area of research, and Akkermansia appears to be one microbial player in that story.
Nutritional Factors That May Influence Akkermansia Levels
Diet is one of the most tractable ways to influence gut microbiome composition, and several dietary factors have been investigated in relation to Akkermansia abundance. High-fiber diets, polyphenol-rich foods (particularly pomegranate, cranberry, and red wine polyphenols), and caloric restriction have all been associated with higher Akkermansia in preclinical and small human studies, though effect sizes and consistency vary.
Micronutrient status may matter for gut microbial aging in mice, but the selenium study did not show that adequate selenium supports Akkermansia [3]. The 2025 selenium-deficiency study in aged mice demonstrated that even a single micronutrient insufficiency, selenium, could significantly accelerate age-related gut microbial changes, with Akkermansia enriched in aged male mice, and worsen diabetes-like symptoms [3]. Selenium is an essential trace element with roles in antioxidant defense and thyroid function, and it is frequently suboptimal in older adults whose dietary intake narrows with age. The dietary interventions studied in the Sardinian centenarian research, characterized by variety, plant food density, and adequate micronutrient intake, align with this theme: diversity of nutrient inputs may support a more resilient microbiome [2].
It is worth noting that no human clinical trial has specifically tested whether selenium supplementation, shilajit, or any other single supplement reliably raises Akkermansia abundance to clinically meaningful levels. The nutritional data is largely mechanistic or observational. Individuals interested in supporting gut health should focus on overall dietary quality before pursuing any single supplement.
Practical Takeaways and Honest Limitations
The evidence reviewed here supports the view that Akkermansia muciniphila is a biologically plausible contributor to healthy aging, not a magic bullet, but a meaningful piece of the gut-health picture. Its associations with centenarian microbiomes, its proposed roles in inflammation, metabolic signaling, and intestinal barrier integrity, and its documented sensitivity to dietary and micronutrient factors all make it worth understanding.
At the same time, the field is early. Most human studies are cross-sectional or small, most mechanistic data come from animal models, and no Akkermansia-based intervention has been approved by the FDA to treat, cure, or prevent any disease. Pasteurized (heat-treated) formulations of Akkermansia muciniphila are available commercially in some markets and have shown acceptable safety profiles in initial human trials, but live probiotic preparations carry specific risks for immunocompromised individuals, those on immunosuppressive therapy, or people with active inflammatory bowel disease. Anyone in those categories should consult a physician before use.
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capsules, 100M AFU, 90 ct: Lower-cost Akkermansia plus chicory inulin synbiotic; 3-month supply, gluten-free. - Double Wood Akkermansia Probiotic + Postbiotic
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A Note on the Evidence
The evidence reviewed here is largely observational or derived from animal models; human clinical trials of Akkermansia supplementation for longevity or aging outcomes are still early-stage and small. Akkermansia supplements are not FDA-approved to treat, cure, or prevent any disease, and live probiotic formulations may carry risk for immunocompromised individuals, those on immunosuppressive therapy, or people with active inflammatory bowel disease: consult a qualified healthcare provider before use. This article is informational only and does not constitute medical advice.
Frequently Asked Questions
Why does Akkermansia decline as we age?
Multiple factors likely contribute, including reduced intestinal mucus production, immune senescence, narrowing dietary variety, increased medication use, and micronutrient insufficiencies. Research in aged mice showed that even isolated selenium deficiency significantly accelerated aging-related gut microbial changes, with Akkermansia being the most affected taxon [3]. The interplay of these factors makes it difficult to isolate any single cause.
Do centenarians really have more Akkermansia?
Results are mixed. Several studies report higher relative abundance of Akkermansia in people who have reached extreme old age, and a 2024 analysis of long-lived cohorts found it enriched in the three largest [1]. Other work found comparable amounts across age groups or lower abundance in Chinese centenarians. A study of healthy Sardinian centenarians found Akkermansia among the main biomarkers [1][2][7][8] alongside plant-rich dietary patterns [2]. These are observational findings: they cannot confirm that Akkermansia causes longevity, only that the two co-occur.
Can Akkermansia support cognitive health in aging?
Preclinical data are suggestive but not conclusive. A 2023 study in aged mice found that Akkermansia muciniphila enrichment was associated with reduced brain IL-6 levels and improved cognitive performance [4]. Animal models have significant limitations in predicting human outcomes, and no human clinical trial has established that Akkermansia supplementation prevents or reverses cognitive decline.
What dietary factors support Akkermansia levels?
High-fiber diets and polyphenol-rich plant foods are associated with higher Akkermansia in preclinical research and a few small human studies. In aged mice, selenium deficiency accelerated age-related gut microbial changes while Akkermansia was enriched rather than depleted in males, so that study does not show that selenium adequacy supports Akkermansia [3][9][10][11]. Dietary patterns associated with centenarian gut health emphasize variety and plant-food density rather than any single supplement [2].
Is it safe to take Akkermansia as a supplement?
Pasteurized Akkermansia formulations have shown acceptable short-term safety in small human trials, but no formulation is FDA-approved to treat or prevent disease. Live probiotic preparations carry potential risk for immunocompromised individuals, those on immunosuppressive medications, or people with active inflammatory bowel disease. Anyone in those categories should consult a physician before use. This is informational content, not medical advice.
How does inflammation connect Akkermansia to aging?
Low-grade chronic inflammation, inflammaging, is a hallmark of biological aging and is linked to both metabolic and neurological decline. Akkermansia is proposed to reduce systemic inflammatory signaling partly by strengthening the intestinal barrier and limiting bacterial product translocation, and partly through direct immune modulation. A 2025 study found that modulating TNF-α through dietary interventions was associated with greater gut microbiota stability in aging, highlighting how anti-inflammatory dietary strategies may support microbial resilience [5].
References
- Chen S et al. Consistent signatures in the human gut microbiome of longevous populations. Gut microbes (2024). PMID 39197040
- Palmas V et al. Gut Microbiota Markers and Dietary Habits Associated with Extreme Longevity in Healthy Sardinian Centenarians. Nutrients (2022). PMID 35745166
- Huang YC et al. Dietary Selenium Deficiency Accelerates the Onset of Aging-Related Gut Microbial Changes in Aged Telomere-Humanized Mice, With Akkermansia muciniphila Being the Most Prominent and Alleviating Selenium Deficiency-Induced Type 2 Diabetes. Aging cell (2025). PMID 40540389
- Zhu X et al. Akkermansia muciniphila, which is enriched in the gut microbiota by metformin, improves cognitive function in aged mice by reducing the proinflammatory cytokine interleukin-6. Microbiome (2023). PMID 37254162
- Mu J et al. TNF-α modulation by rice bran peptides: implications for gut microbiota stability and cognitive health in aging. NPJ biofilms and microbiomes (2025). PMID 41068138
- Wang S et al. Age-associated Akkermansia muciniphila decline links to brown adipose tissue aging: AKK supplementation improves BAT metabolic function. Beneficial microbes (2026). PMID 42767634
- Elena Biagi et al. Through Ageing, and Beyond: Gut Microbiota and Inflammatory Status in Seniors and Centenarians. PLoS ONE (2010). PMID 20498852
- Wang Fang et al. Gut Microbiota Community and Its Assembly Associated with Age and Diet in Chinese Centenarians. Journal of Microbiology and Biotechnology (2015). PMID 25839332
- Sanne Verhoog et al. Dietary Factors and Modulation of Bacteria Strains of Akkermansia muciniphila and Faecalibacterium prausnitzii: A Systematic Review. Nutrients (2019). PMID 31336737
- Fernando F. Anhê et al. A polyphenol-rich cranberry extract protects from diet-induced obesity, insulin resistance and intestinal inflammation in association with increased Akkermansia spp. population in the gut microbiota of mice. Gut (2014). PMID 25080446
- Gurley BJ et al. Decaffeinated Green Tea Extract Does Not Elicit Hepatotoxic Effects and Modulates the Gut Microbiome in Lean B6C3F₁ Mice. Nutrients (2019). PMID 30987244
- Maria Carlota Dao et al. Akkermansia muciniphila and improved metabolic health during a dietary intervention in obesity: relationship with gut microbiome richness and ecology. Gut (2015). PMID 26100928
- Todmal TG et al. How Gut Microbiota Influence Healthy Aging: Overview of Reviews. Geriatrics (Basel, Switzerland) (2026). PMID 42645011
- Noora Ottman et al. Pili-like proteins of Akkermansia muciniphila modulate host immune responses and gut barrier function. PLoS ONE (2017). PMID 28249045
- Plovier H et al. A purified membrane protein from Akkermansia muciniphila or the pasteurized bacterium improves metabolism in obese and diabetic mice. Nature medicine (2017). PMID 27892954
- Dulai AS et al. The Gut Microbiome's Influence on Incretins and Impact on Blood Glucose Control. Biomedicines (2024). PMID 39767626
- Lee DW et al. Recombinant Amuc_1100 from Akkermansia muciniphila modulates tight junction-associated protein in vaginal epithelial cells. Archives of microbiology (2026). PMID 42554872
- Song Z et al. Amuc attenuates high-fat diet-induced metabolic disorders linked to the regulation of fatty acid metabolism, bile acid metabolism, and the gut microbiota in mice. International journal of biological macromolecules (2023). PMID 37119914
- Xia T et al. Associations Between Gut Microbiota and Immune Profiles in Community-Dwelling Older Adults and the Regulatory Role of Polygonatum odoratum. Aging cell (2026). PMID 42775700
These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease. Content is for informational purposes only and is not medical advice; consult a qualified healthcare provider before starting any supplement. As an Amazon Associate we earn from qualifying purchases.
