Akkermansia muciniphila: What It Does and Why It's in So Many Supplements

Akkermansia muciniphila is a gut bacterium that lives in the layer of mucus lining your intestine, and it has become one of the most talked-about ingredients in metabolic health supplements. People with more of it tend to have better blood sugar and body fat measures, and two human trials have tested it as a supplement. Before picking up a probiotic with Akkermansia on its label, it helps to know which claims rest on those trials, which come from mouse studies, and which form of Akkermansia a product contains.

In short:

• Akkermansia feeds on the mucus layer of your gut, which appears to keep that protective layer topped up.
• People with more Akkermansia tend to have better blood sugar and body fat measures, though research has not shown which causes which.
• It is in more supplements because two human trials reported results, the heat-killed form was approved for sale in the EU and UK, and brands are looking for natural metabolic products in the era of GLP-1 drugs.
• Effects on GLP-1, the hormone that popular weight-loss drugs mimic, have been seen in mice. In people, the trials so far have measured insulin sensitivity and weight.
• If you are choosing a product, look for heat-killed (pasteurised) Akkermansia, the form with the clearer human results and the one approved in the EU and UK.

What is Akkermansia muciniphila?

Akkermansia muciniphila is a bacterium that lives in the mucus layer lining your large intestine and feeds on mucin, the main component of that mucus. It was first described in 2004 by researchers in the Netherlands, and in healthy adults it commonly makes up more than 1% of gut bacteria, a large share for a single species.

The name describes what it does: muciniphila means mucus-loving. Most of the gut bacteria you read about ferment the fibre in your food. Akkermansia feeds on the mucin your own gut cells make, which places it right at the boundary between your gut bacteria and your gut lining.

Why is Akkermansia suddenly in so many products?

Akkermansia has moved from research papers to supplement shelves because four things happened within a few years:

1. Human trials reported results. A 2019 trial in adults with overweight and insulin resistance reported better insulin sensitivity and lower cholesterol, and a 2026 trial reported less weight regain after dieting. Both are covered below.
2. The heat-killed form was approved. The EU authorised pasteurised Akkermansia as a novel food in 2022 and UK regulators followed in 2024, which allowed it to be sold as a food supplement in those markets. In 2026 the EU extended the approval to adolescents aged 12 and over.
3. GLP-1 drugs changed the market. The popularity of GLP-1 weight-loss medicines has pushed supplement brands towards gut-based metabolic products, and several 2026 launches were marketed as GLP-1 support with Akkermansia as a headline ingredient.
4. A large company stepped in. The pasteurised strain used in the trials is made by The Akkermansia Company, which Danone acquired in 2025 and which was granted a US patent for metabolic uses of Akkermansia in 2026. Researchers linked to the company were among the authors of the 2026 trial, which is worth knowing when you weigh its results.

The interest rests on real research. Some of the marketing goes further than that research, especially on GLP-1, so the sections below separate the two.

Why does a bacterium that eats your mucus layer make it thicker?

Akkermansia feeding on mucin appears to prompt your gut lining to make more, so the layer is kept topped up. It works more like grazing a lawn, which keeps the grass growing. In mice fed a high-fat diet, the mucus layer thinned, and giving them Akkermansia restored it to normal thickness.

The mucus layer keeps gut bacteria and their by-products at a distance from your gut lining. When it thins, more bacterial material, including a molecule called lipopolysaccharide, passes into the bloodstream. In the same mouse studies, Akkermansia reduced this leakage, which is one of the routes researchers link to low-grade inflammation and poorer metabolic health.

What are the benefits of Akkermansia?

In people, Akkermansia supplements have been linked to better insulin sensitivity and to less weight regain after dieting, based on two small trials. Most of what is known about how it works comes from mice.

• Insulin sensitivity and cholesterol. In a three-month trial that 32 adults with overweight or obesity and insulin resistance completed, those taking 10 billion heat-killed Akkermansia cells a day improved insulin sensitivity by about 29% and lowered total cholesterol by about 9% compared with placebo. Body weight and fat mass fell slightly, but not by enough to rule out chance, and fasting blood sugar and HbA1c, a measure of average blood sugar, did not change.
• Weight maintenance after dieting. In a 2026 trial, 90 adults with overweight or obesity lost weight on an eight-week low-calorie diet, then took heat-killed Akkermansia or placebo for 24 weeks. The Akkermansia group regained about 1.2 kg on average, against 3.2 kg on placebo, and kept better insulin sensitivity.

Both trials were small and short, and each tested a specific preparation, so the results apply to that preparation at that dose. When you compare products, the useful question is whether a product matches what was tested.

Does Akkermansia raise GLP-1?

In mice, yes. In people, it has not been shown. GLP-1 is a gut hormone that helps you feel full and controls blood sugar after meals, and it is the hormone that GLP-1 weight-loss drugs mimic. In a 2021 study, a protein called P9, which live Akkermansia releases, raised GLP-1 in mice fed a high-fat diet. The human trials above focused on insulin sensitivity and body weight. So read GLP-1 claims on a label as early research, and judge a product by the human results.

What does it mean if your Akkermansia is low?

Lower Akkermansia is linked to poorer metabolic health, though research has not shown whether low levels cause the problems or follow from them. Studies have found lower levels in people with obesity and with inflammatory bowel disease.

In a study of 49 adults with overweight or obesity, those who started with more Akkermansia had lower fasting blood sugar and insulin, a smaller waist-to-hip ratio and smaller fat cells. On a six-week calorie-controlled diet, they also improved more than people who started with less. Diet is one of the main things that shifts your levels, which the next section covers.

How do you increase Akkermansia naturally?

Polyphenol-rich foods and some fibres have raised Akkermansia, mostly in animal studies, and it is consistently higher in people taking the diabetes drug metformin. Akkermansia does not eat fibre itself. Fibre appears to help by feeding the wider gut community and supporting the mucus layer, and Akkermansia benefits from both.

• Polyphenol-rich foods, such as cranberries, grapes, pomegranate, green tea and cocoa. A cranberry extract raised Akkermansia in mice on a high-fat, high-sugar diet, though human data is limited.
• Inulin-type fibres, found in onions, garlic, leeks and bananas. Oligofructose, a type of inulin fibre, raised Akkermansia sharply in obese mice. This evidence also comes mostly from animals.
• Metformin. Adults with type 2 diabetes taking this prescription medicine had about 3.4 times more Akkermansia than those not taking it, the most consistent finding in people.

Begin with one small step. Add a polyphenol-rich food you already enjoy, such as a handful of grapes or a cup of green tea, to your day.

What forms of Akkermansia are in supplements?

Supplements contain Akkermansia in one of two forms, live or heat-killed, and some products contain no Akkermansia at all and aim to raise your own instead.

1. Live. Living cells grown without oxygen. In people, live Akkermansia has been tested in one group of the 2019 trial, where the doses were kept frozen. It needs freezing or a protective coating to stay alive, so look for a viable count guaranteed to the end of shelf life.
2. Heat-killed (pasteurised). Cells heated so they can no longer grow. This is the form used in the 2019 and 2026 trials and the one approved in the EU and UK, and its stability does not depend on keeping cells alive. Look for "pasteurised" or "heat-killed" with a cell count per daily dose.
3. Boosters. Products with no Akkermansia in them, using polyphenols or fibres meant to feed your own. The evidence for them is indirect and mostly from animal studies. Check the ingredient list, since there is no cell count.

Why is live Akkermansia hard to keep alive?

Akkermansia is adapted to the mucus layer, where there is almost no oxygen. It copes with trace amounts, but it has to be grown in oxygen-free fermentation, and keeping the cells alive afterwards takes work. In the 2019 trial, live doses were delivered frozen and kept in participants' home freezers at -20°C for the full three months. Live products sold at room temperature rely on protective coatings to keep the cells alive, so check whether the label guarantees the viable count at the end of its shelf life.

What is a postbiotic, and why is heat-killed Akkermansia one?

A postbiotic is a preparation of non-living microbes, or parts of them, that provides a health benefit, as defined by the International Scientific Association for Probiotics and Prebiotics in 2021. Heat-killed Akkermansia fits that definition. The cells are heated (70°C for 30 minutes in the 2019 trial) so they can no longer grow, but their structure stays intact.

That structure appears to be what matters. A protein on Akkermansia's outer membrane, Amuc_1100, survives heating and signals to the cells of the gut lining. In mice, both heat-killed Akkermansia and the purified protein improved metabolic measures, and heating made the bacterium more effective. In the 2019 human trial, the heat-killed form gave the clearer results: its improvements in insulin sensitivity and cholesterol were statistically significant, while the changes in the live group were smaller and mostly were not.

Because nothing needs to stay alive, a heat-killed product does not depend on cold storage or protective coatings. On a label, look for "pasteurised" or "heat-killed" and a cell count per daily dose. The 2019 trial used 10 billion cells a day, and the EU approval allows up to 34 billion. Our guide to Akkermansia supplements compares products on strain, dose and form.

Is Akkermansia muciniphila supplementation safe?

For most adults, heat-killed Akkermansia appears safe at the doses studied. The EU approved it in 2022 for adults at up to 34 billion cells a day, and UK food safety regulators reached a similar conclusion in 2024 for people aged 12 and over. Side effects reported in the trials were mild.

The EU approval excludes pregnant and breastfeeding women. Speak to a doctor before taking it if that applies to you, or if you take prescribed medication or have a diagnosed condition.

How AMILI's Metabolic Health formulation uses Akkermansia

AMILI's Metabolic Health probiotic includes heat-killed Akkermansia muciniphila, the form with the clearer human results and the one approved in the EU and UK. It sits alongside four live strains, Lacticaseibacillus rhamnosus, Lactiplantibacillus plantarum, Bifidobacterium animalis subsp. lactis and Bifidobacterium adolescentis, with inulin, artichoke extract and milk thistle, designed to complement each other for metabolic support. The formulation was developed with technology licensed from National University Hospital using Asian gut microbiome data.

This article is for general information and isn't a substitute for personalised medical advice. If you have ongoing gut symptoms, speak with a doctor.

Frequently Asked Questions

1. What is Akkermansia muciniphila?
   A gut bacterium that lives in the mucus layer lining the large intestine and feeds on mucin. In healthy adults it commonly makes up more than 1% of gut bacteria.
2. Is Akkermansia good or bad?
   It is generally regarded as beneficial. Higher levels are associated with better blood sugar and body fat measures, and lower levels with obesity and inflammatory bowel disease, though these are associations and research has not shown which causes which.
3. Why is Akkermansia called a next-generation probiotic?
   The term separates it from the lactobacilli and bifidobacteria that most probiotics use. Akkermansia has no history of use in food, was identified recently, and needs oxygen-free manufacturing. The term describes where it came from, and says nothing about how strong the evidence is.
4. Is heat-killed Akkermansia still a probiotic?
   Strictly, no. A probiotic must be alive, so heat-killed Akkermansia is a postbiotic: a preparation of non-living microbes that provides a health benefit. Live Akkermansia would count as a probiotic.
5. Does Akkermansia help with weight loss?
   The best evidence is for keeping weight off. In a 2026 trial, adults who took heat-killed Akkermansia after a low-calorie diet regained about 1.2 kg over 24 weeks, against 3.2 kg on placebo. In the 2019 trial, weight fell slightly but not significantly.
6. Can I take Akkermansia with GLP-1 medication?
   This combination has not been tested in trials. Speak to the doctor who prescribed your medication before adding any supplement.
7. How long does Akkermansia take to work?
   The human trials ran for three and six months, so results, where they appeared, were measured over months. Neither trial tested shorter periods.
8. What foods increase Akkermansia?
   Polyphenol-rich foods such as cranberries, grapes, pomegranate, green tea and cocoa, and inulin-type fibres from onions, garlic, leeks and bananas. Most of this evidence comes from animal studies.

Glossary

• Amuc_1100: A protein on the outer membrane of Akkermansia that survives heating and signals to the cells of the gut lining. It is thought to explain much of heat-killed Akkermansia's effect.
• GLP-1: A gut hormone released after eating that helps you feel full and controls blood sugar. GLP-1 weight-loss drugs mimic it.
• HbA1c: A blood test that reflects your average blood sugar over the previous two to three months.
• Insulin sensitivity: How well your cells respond to insulin. Higher sensitivity means less insulin is needed to keep blood sugar steady.
• Lipopolysaccharide: A molecule from the outer wall of some gut bacteria. When it passes into the blood, it is linked to low-grade inflammation.
• Metformin: A prescription medicine for type 2 diabetes. People taking it tend to have more Akkermansia.
• Mucin: The main component of the mucus that lines the gut, made by your own gut cells.
• Novel food: A food or ingredient without a significant history of consumption in the EU before 1997, which must be assessed for safety before it can be sold.
• Pasteurised: Heated to a set temperature for a set time so that microbes can no longer grow. For Akkermansia, the same as heat-killed.
• Polyphenols: Plant compounds found in foods such as berries, grapes, tea and cocoa, some of which are used by gut bacteria.
• Postbiotic: A preparation of non-living microbes, or parts of them, that provides a health benefit.
• Probiotic: Live microorganisms that provide a health benefit when taken in adequate amounts.

About the Author

Yuzu Tay is a science communicator trained in biomedical engineering and leads marketing and communications at AMILI. Her focus is on translating and sharing real science to help people make better decisions about their health, staying close to what the evidence does and does not show. Her work spans cancer companion diagnostics, liver fibrosis and gut health.

References

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