Akkermansia muciniphila: what this gut bacterium does, and what a supplement can and can't do

Short answer

Akkermansia muciniphila is a gut bacterium that lives in the mucus lining of your intestine and is often lower in people with obesity and type 2 diabetes. That link made it one of the most hyped "next-generation probiotics".

Human evidence is small but interesting. In a pilot trial of 32 overweight or obese adults with insulin resistance, a daily dose of pasteurized (heat-killed) Akkermansia for three months improved insulin sensitivity by about 29% compared with placebo and lowered fasting insulin and total cholesterol. Weight, fat mass and hip size did not change significantly, and the live bacteria showed no significant effects (1). A 12-week trial of a five-strain product containing Akkermansia in 49 people with type 2 diabetes lowered blood sugar after meals; the drop in HbA1c (0.6 points) narrowly missed statistical significance, and all the authors worked for the manufacturer (2).

Is it a weight-loss or "natural GLP-1" supplement? No trial shows that. The GLP-1 link comes from a protein studied in mice (3).

Side effects in trials were mild: temporary nausea or loose stools in some people.

If you are looking at Akkermansia because your blood sugar is creeping up or weight feels impossible to shift, it is not your fault and you are not failing at willpower. Metabolism is biology, and it deserves a doctor's attention, not just a capsule.

Note: this article is for general education and is not medical advice. Akkermansia supplements are not a treatment for diabetes, obesity or any disease. If you take diabetes medicines, are pregnant or breastfeeding, have a weakened immune system or a serious bowel condition, talk to your doctor before taking any probiotic. Do not stop or change prescribed medicines on your own. This guide is published by Welltory, which makes one of the apps mentioned. Welltory is a general wellness product: it helps you track and understand your data and does not diagnose or treat any condition.

What is Akkermansia muciniphila?

Akkermansia muciniphila is a bacterium first isolated in 2004. Its name says what it does: muciniphila means "mucin-loving". It lives in the mucus layer that coats the inside of your gut and feeds on mucin, the main protein in that mucus. In healthy adults it makes up roughly 1–4% of gut bacteria (4).

By eating mucin, Akkermansia seems to encourage the gut to keep renewing its mucus layer. Researchers think this helps keep the gut barrier intact, which may reduce the amount of bacterial fragments that leak into the blood and drive low-grade inflammation. Much of that picture comes from mouse studies.

Where the hype comes from. Lower levels of Akkermansia have been linked with obesity, type 2 diabetes, fatty liver disease, cardiovascular disease and older age (4). But these are associations, and not all studies agree: some found higher levels in people with type 2 diabetes and in obese children. A low level may be a marker of an unhealthy metabolism rather than its cause.

If you are new to the topic, our guide to the gut microbiome explains how gut bacteria and health are connected, and probiotics covers the classic strains.

What are the benefits of Akkermansia, according to human trials?

Two important details:

• The pilot was small and exploratory. It was not designed to prove an effect, and the authors called for larger trials. The pasteurized group also started with worse insulin values than the placebo group (1).

• Industry involvement. The pilot's researchers planned to commercialize the bacterium, and all authors of the diabetes trial were employees of the company selling the product (2). That does not make the results wrong, but independent replication matters.

So far, no large, independent trial shows that Akkermansia improves diabetes outcomes, prevents heart disease or causes meaningful weight loss.

Does Akkermansia help with weight loss?

Not shown in people. "Akkermansia weight loss" is a common search because mice given Akkermansia gained less fat on a high-fat diet. In the human pilot trial, the changes in body weight (−2.3 kg) and fat mass (−1.4 kg) compared with placebo were not statistically significant (1). In the diabetes trial, weight did not change (2).

Is Akkermansia a "natural GLP-1"?

No. This claim comes from a 2021 study in which a protein secreted by Akkermansia, called P9, stimulated GLP-1 release and heat production in brown fat in mice (3). GLP-1 is the hormone that drugs such as semaglutide mimic. But a mouse study with a purified protein is very far from a capsule in people. No human trial has shown that an Akkermansia supplement raises GLP-1 enough to affect appetite or weight, and it is not a substitute for GLP-1 medicines.

Live or pasteurized: which form is in supplements?

This matters more than most labels admit.

• Pasteurized (heat-killed) Akkermansia was the form that improved insulin markers in the human pilot. In the EU, pasteurized Akkermansia was authorized as a novel food after the European Food Safety Authority judged it safe for adults at up to 3.4 × 10¹⁰ cells a day, excluding pregnant and breastfeeding women (5).

• Live Akkermansia is sold in the US in some products. In the pilot trial, the live form did not significantly change metabolic markers (1), though only nine people completed that arm.

Akkermansia needs an oxygen-free environment and is hard to grow at scale (4), which partly explains why products are expensive. Supplements in the US are not approved by the FDA before sale, and the number of bacteria on the label is not independently checked unless a product carries third-party testing.

What are the side effects of Akkermansia?

In the trials, side effects were mild. The human pilot reported no adverse events over three months (1). In the diabetes trial, some people had nausea or diarrhea that lasted three to five days (2).

Points to consider:

• Weakened immune system or serious illness. As with any live bacteria, people who are immunocompromised, critically ill or have a central line should not take live probiotics without medical advice.

• Inflammatory bowel disease. Akkermansia feeds on mucus, and in some animal models of infection it worsened gut inflammation (4). If you have Crohn's disease or ulcerative colitis, ask your gastroenterologist first.

• Diabetes medicines. If a product lowers your blood sugar after meals, it may add to the effect of insulin or sulfonylureas. Monitor more closely when you start.

• Pregnancy and breastfeeding. The EU safety assessment excluded these groups (5).

Our guide to supplement and drug interactions explains how to check a new supplement against your medicines.

How can you increase Akkermansia naturally?

The evidence here mostly comes from animal studies, but the overlap with an overall healthy diet is large (4):

• Polyphenol-rich foods. Grapes, cranberries, pomegranate and other colourful plants raised Akkermansia in animal studies.

• Fibre and prebiotics. Fructo-oligosaccharides and inulin (found in onions, garlic, leeks, asparagus, bananas and chicory root) increased it in mice; a diet with more fermentable fibre was linked with higher levels in people.

• Calorie restriction. Higher levels are frequently seen with calorie restriction and after gastric bypass surgery.

• Metformin. The diabetes drug is associated with higher Akkermansia in people, possibly by increasing mucus production rather than feeding the bacterium directly.

None of these has been shown to work because of Akkermansia. Eating more plants and fibre helps your gut and your metabolism in several ways at once. Our guide to foods for gut health has a practical list.

Should you test your gut microbiome for Akkermansia?

Consumer stool tests can report Akkermansia levels, but there is no agreed "normal" range, levels vary from day to day, and no treatment decision depends on the number. A result will not tell you whether a supplement would help you. If you have gut symptoms, a doctor can check for conditions that matter, such as coeliac disease, inflammatory bowel disease or SIBO.

How is Akkermansia different from regular probiotics?

Most probiotics on store shelves contain Lactobacillus and Bifidobacterium strains. These are bacteria that tolerate oxygen, have been used in fermented foods for centuries and have a long safety record. Akkermansia belongs to a newer group sometimes called "next-generation probiotics": bacteria picked because they are common in healthy guts and seem to be linked with health, rather than because they were traditionally eaten.

That difference has practical consequences:

• Less human data. Classic strains have been tested in hundreds of trials for diarrhea, irritable bowel syndrome and other conditions. Akkermansia has a handful of human studies, all small.

• A different target. Classic probiotics are mostly studied for digestion and infections. Akkermansia is studied for metabolism: insulin, blood sugar and cholesterol.

• Harder to make. Akkermansia dies in oxygen, which is one reason the pasteurized form was developed and why products cost more.

• No food source. You can get Lactobacillus from yogurt or kefir. There is no food that contains meaningful amounts of Akkermansia; you can only try to feed the Akkermansia you already have.

If your main goal is digestion, the classic strains have far more evidence; our guide to probiotics for gut health compares them. If your goal is blood sugar, the most effective steps are still the ones your doctor would suggest first: movement, sleep, fibre and, when needed, medicine.

How to check whether a probiotic is doing anything for you

1. Decide what you expect to change. For blood sugar: lab results your doctor orders, or readings from a glucose meter if you already use one. For digestion: a simple daily symptom score.

2. Record a baseline for two to four weeks.

3. Change one thing at a time. Starting a probiotic, a new diet and a gym membership in the same month makes it impossible to tell what helped.

4. Give it 8–12 weeks, like the trials did. Our guide on how long supplements take to work explains why.

5. Compare averages, then decide. If nothing changed, you have learned something and saved the money.

Living with blood sugar worries: the questions people ask next

Can Akkermansia replace metformin?

No. Akkermansia has not been tested as a replacement for any diabetes medicine. In the main diabetes trial, everyone was already taking metformin. Do not stop or change prescribed medicines on your own.

Is Pendulum Akkermansia worth it?

Pendulum is a US brand selling Akkermansia products. Its Glucose Control formula was tested in the 12-week trial described above, which was run by company employees: after-meal glucose fell, while the HbA1c change was not statistically significant. Whether that is worth the price is a personal decision; discuss it with your doctor if you have diabetes.

Can I take Akkermansia with other probiotics?

There is no known reason you can't, but taking several products at once makes it impossible to know which one, if any, helped.

Does coffee or green tea increase Akkermansia?

Both contain polyphenols, and some animal studies suggest polyphenols raise Akkermansia. Human evidence is limited. We looked at coffee and the gut microbiome separately.

Before you blame yourself

When blood sugar rises or weight won't move, it is easy to hear that as a judgement about effort. It isn't. Genetics, sleep, stress, medicines, hormones and age all shape metabolism, and the gut is one more piece of a complicated system.

A supplement can be one experiment. The bigger levers are still sleep, movement, fibre and, when needed, medicine.

When to see a doctor

See a doctor if you have symptoms of high blood sugar such as increased thirst, frequent urination, blurred vision or unexplained weight loss; if your HbA1c or fasting glucose has been flagged as high; or if you have ongoing gut symptoms such as diarrhea, blood in your stool, abdominal pain or weight loss.

Seek urgent help for vomiting with abdominal pain and very high blood sugar, confusion, or signs of severe dehydration.

How to bring this up with your doctor

What to ask for, by name. "Could you check my HbA1c and fasting glucose, and tell me whether I have prediabetes or insulin resistance?" and "Would an Akkermansia supplement interact with any of my medicines?"

What to bring. A list of all medicines and supplements with doses, any glucose readings, and notes on diet, sleep and symptoms.

What to say, out loud. "I'm worried about my blood sugar because [family history / a high result / weight gain]. I'm considering a probiotic and want to know what you'd recommend first."

If you're told to just eat less. Ask: "Which test would tell us whether this is insulin resistance, and when should I repeat it?" Our guides to prediabetes treatment and insulin resistance treatment cover what usually comes next.

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How Welltory helps — and what it cannot do

The limits first. Welltory is a general wellness product, not a medical device. It does not measure your gut bacteria, blood sugar or insulin, and it cannot tell you whether a probiotic is working.

What it can do is help you keep a supplement trial honest by tracking the signals around it: sleep, stress and recovery.

Tag what you change. When Welltory detects a stress or recovery episode and asks "What happened?", you can tap a suggested tag, type, or answer by voice: "started Akkermansia", "high-fibre dinner", "late meal", "short night" (My Patterns).

Look at My Patterns after a few weeks. Patterns start to appear after around seven tagged events, and insight cards need at least seven occurrences of a tag in the current month plus some data from the previous month. They show which tags tend to come with stress and which with recovery; some sections, like the month-to-month comparison, need a paid plan (My Patterns).

Sleep, Battery and Stress. On iPhone with an Apple Watch or Oura, the Today screen shows Health, Battery and Stress: Battery starts each morning from your resting heart rate on waking and your sleep, and drops with stress through the day (Today screen).

HRV without a new device. You can take a spot HRV measurement with your phone camera and flash — a short, deliberate reading, not 24/7 tracking (camera measurements). Measure at the same time each morning (accurate HRV measurements).

A record for your doctor. From the web app you can export your data as CSV: Dashboard → choose a chart → pick the time range → Export (export guide). Patterns are associations to discuss with your doctor, not proof of what a supplement is doing.

For the full before-and-after method, see our guide on how to tell if a supplement or gadget is working.

How we made it

We based this article on a randomized pilot trial of Akkermansia in overweight and obese adults published in Nature Medicine, a 12-week trial of a multi-strain product in type 2 diabetes, a 2024 review of Akkermansia and metabolic disease, a mouse study of the Akkermansia protein P9 and GLP-1, and the European Food Safety Authority's safety opinion on pasteurized Akkermansia. Search questions came from what people in the United States most often ask about Akkermansia. For the product section, we checked every function against the Welltory Help Center on October 23, 2026.

Made with AI tools, then edited and fact-checked by the Welltory team. See our Editorial & AI policy.

Jane Smorodnikova, co-founder of Welltory, built the methodology behind how we read physiological data.

Written by Tatsiana Yashyna.

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