Pendulum® Metabolic Daily vs. Metabolic Daily PRO: Live Akkermansia, Butyrate & the 5-Strain Microbiome

For years, probiotic marketing revolved around a remarkably simple idea: more bacteria must be better.

A bottle containing 50 billion organisms sounded more impressive than one containing 10 billion. Fifteen species looked more sophisticated than five. The numbers became part of the sales pitch even though they told us relatively little about what those organisms were actually doing once they reached the gut.

Microbiome research has made that way of comparing probiotics increasingly outdated.

Different organisms occupy different ecological niches. Some interact with the mucus layer. Some ferment carbohydrates. Some produce short-chain fatty acids. Others consume metabolites produced by neighboring organisms and turn them into something new.

Pendulum's Metabolic Daily platform is built around that more functional view of the microbiome.

Metabolic Daily and Metabolic Daily PRO Were Different Products

This distinction remains worth making because people who previously used Metabolic Daily PRO may still encounter references to both formulas.

Pendulum® Metabolic Daily is the current retail formulation. It provides 300 million AFU per capsule and is available in 30- and 90-capsule sizes.

Pendulum® Metabolic Daily PRO was the higher-potency professional formulation. It provided 1 billion AFU per capsule in a 30-capsule bottle. Pendulum Life has discontinued Metabolic Daily PRO.

Both contain, or in the case of the discontinued PRO formulation contained, the same five organisms:

• Akkermansia muciniphila WB-STR-0001
• Clostridium butyricum WB-STR-0006
• Clostridium beijerinckii WB-STR-0005
• Anaerobutyricum hallii WB-STR-0008
• Bifidobacterium infantis

Metabolic Daily PRO therefore provided a little more than three times the total labeled AFU per capsule. That was a formulation difference, not proof of three times the effect. The two products were not compared head-to-head in a clinical outcomes trial, and probiotic biology does not scale in a simple linear relationship with AFU count.

Why Akkermansia Gets So Much Attention

Akkermansia muciniphila naturally lives close to the intestinal mucus layer, placing it at an interesting interface between the gut microbiome and the epithelial surface beneath it.

Over the past decade, lower Akkermansia abundance has repeatedly been associated with obesity, insulin resistance, type 2 diabetes, and other metabolically unfavorable states. Those observations did not prove that low Akkermansia caused those conditions, but they were consistent enough to justify controlled human intervention studies.

That progression is important. Microbiome research contains thousands of associations. Far fewer organisms have moved into randomized human trials.

The Human Akkermansia Research Is Becoming More Interesting

An early human trial published in Nature Medicine in 2019 studied adults who were overweight or obese and had insulin resistance. Participants received live Akkermansia, pasteurized Akkermansia, or placebo for three months.

The study was small, but the pasteurized preparation produced changes in several metabolic measures, including insulin sensitivity and fasting insulin. More importantly, it demonstrated that Akkermansia could be administered to humans and produce measurable physiologic effects.

In 2026, another randomized study examined pasteurized Akkermansia during weight-loss maintenance. Participants first completed an eight-week weight-loss phase and were then followed for another 24 weeks. Those receiving Akkermansia regained less weight than the placebo group.

A separate 2026 trial in adults with metabolic syndrome was more nuanced. Akkermansia did not significantly improve the study's primary measure of insulin sensitivity across the entire group, but exploratory analyses suggested that people starting with relatively low Akkermansia abundance may have responded differently.

That may eventually become an important part of microbiome medicine. The effect of adding an organism may depend partly on what is already living in the gut.

These studies are highly relevant to the broader Akkermansia story, but they should not be treated as direct trials of Pendulum Metabolic Daily or the former Metabolic Daily PRO. Different studies have used different strains, doses, live or pasteurized organisms, and different populations.

The Other Four Organisms Are Part of the Point

Metabolic Daily is not simply an Akkermansia supplement with four organisms added to fill out the label.

The formulation is designed around microbial interaction.

Clostridium butyricum

Clostridium butyricum is known for producing butyrate, one of the major short-chain fatty acids generated through intestinal fermentation. Butyrate serves as an important energy source for colon cells and participates in normal intestinal-barrier and immune physiology.*

Anaerobutyricum hallii

Anaerobutyricum hallii participates in microbial cross-feeding. It can use metabolites generated by other bacteria and convert them into additional fermentation products, including short-chain fatty acids.

Clostridium beijerinckii

Clostridium beijerinckii is another anaerobic fermenter involved in microbial metabolism. Its presence reflects the effort to assemble organisms with complementary functions rather than relying on one probiotic mechanism.*

Bifidobacterium infantis

Bifidobacterium infantis metabolizes carbohydrates and produces compounds that neighboring organisms can use. Within a microbial ecosystem, that can be just as important as what an organism produces by itself.

Microbial Cross-Feeding: The Part Most Probiotic Labels Never Explain

The idea is simple. One bacterium consumes a substrate and produces a metabolite. Another bacterium uses that metabolite and produces something else.

These exchanges happen throughout the colon. They influence which organisms flourish, which metabolites accumulate, and how the surrounding intestinal environment behaves.

That is closer to the way a microbiome actually functions than the usual image of a capsule depositing a collection of independent bacteria into the gut.

The five-organism Metabolic Daily ecosystem was built around those relationships.

Why Butyrate Matters

Butyrate has become one of the best-known microbial metabolites in gut research.

Colon cells use it as an important fuel source. It also participates in signaling associated with intestinal barrier integrity, immune regulation, and metabolic physiology. Short-chain fatty acids can interact with receptors on intestinal and enteroendocrine cells, creating one of the communication pathways between gut microbes and the rest of the body.*

Pendulum's earlier diabetes research adds an interesting human piece to this biology. A follow-up metabolomic analysis found increased circulating butyrate during treatment with its five-organism research formulation. Changes were also observed in ursodeoxycholic acid, or UDCA.

That does not tell us that every person taking Metabolic Daily will raise circulating butyrate. It does show that a related bacterial consortium was capable of changing measurable microbial metabolites in humans.

The Pendulum Diabetes Trial

Pendulum's best-known clinical study was a multicenter, randomized, double-blind, placebo-controlled trial involving 76 adults with type 2 diabetes, published in 2020.

The experimental formulation was known as WBF-011 and contained the same five bacterial species used across the Metabolic Daily ecosystem:

• Akkermansia muciniphila
• Clostridium butyricum
• Clostridium beijerinckii
• Anaerobutyricum hallii
• Bifidobacterium infantis

Participants receiving WBF-011 had improved post-meal glucose exposure compared with placebo. The investigators also reported an approximately 0.6 percentage point improvement in A1C as a secondary outcome.

For microbiome research, the study was useful because it showed that a deliberately assembled bacterial consortium could produce measurable metabolic effects in humans rather than simply changing the composition of a stool sample.

WBF-011 was not standard Metabolic Daily and it was not the former Metabolic Daily PRO. The research formulation used a different dosing strategy and included inulin. The work is more directly connected with Pendulum's Glucose Control product development.

For that reason, neither standard Metabolic Daily nor the discontinued Metabolic Daily PRO should be advertised as clinically proven to lower A1C by 0.6%.

The study is better understood as evidence supporting the broader five-species biological strategy.

What Does the Microbiome Have to Do With GLP-1?

GLP-1 is produced naturally by enteroendocrine cells in the intestine. Nutrients, bile acids, short-chain fatty acids, and other microbial metabolites can influence signaling in those cells.

That gives the intestinal microbiome a legitimate role in the physiology surrounding endogenous GLP-1 production.

It should not be confused with the pharmacology of semaglutide, tirzepatide, or other GLP-1-based medications. Those medications produce sustained receptor stimulation at pharmacologic exposures. Microbial signaling works on a different scale.

The microbiome-GLP-1 connection remains worth studying because it is part of normal human metabolic physiology, not because probiotics are natural substitutes for prescription drugs.

For more on the broader relationship between the gut and metabolic health, see the HormoneSynergy® Gut Health, Microbiome, and Longevity Medicine Resource.

What About Weight Management?

The microbiome participates in weight regulation, but body weight is influenced by a much larger network involving appetite, food intake, muscle mass, physical activity, sleep, medications, hormones, genetics, and the food environment.

The recent Akkermansia weight-maintenance research is encouraging because it moves the field further into controlled human studies. The intervention in that trial, however, was a different pasteurized Akkermansia preparation rather than Pendulum Metabolic Daily.

Metabolic Daily should therefore not be presented as a stand-alone weight-loss treatment. The same was true of the discontinued Metabolic Daily PRO formulation.

The more reasonable role is as part of a broader microbiome and metabolic-health strategy.*

What Did the Higher PRO Dose Mean?

Before it was discontinued, Metabolic Daily PRO provided 1 billion AFU compared with 300 million AFU in standard Metabolic Daily. That was a meaningful formulation difference, but there was not enough evidence to translate that difference into a precise clinical advantage.

Probiotic effects depend on more than the number of viable organisms swallowed. Strain characteristics, survival through the gastrointestinal tract, baseline microbiome composition, diet, substrate availability, dosing consistency, and the ecological environment of the colon can all influence what happens next.

There was no evidence showing that 1 billion AFU produced 3.3 times the effect of 300 million AFU.

With Metabolic Daily PRO now discontinued, people interested in Pendulum's five-organism daily formula can still obtain the same five bacterial species in standard Metabolic Daily.

Where Metabolic Daily Fits Today

Metabolic Daily remains the everyday five-organism formulation at 300 million AFU per capsule and is available in 30- and 90-capsule sizes.

Metabolic Daily PRO was the higher-potency version at 1 billion AFU per capsule. Pendulum Life has discontinued this formulation.

Glucose Control PRO has the closest relationship to Pendulum's published clinical development work involving adults with type 2 diabetes.

GLP-1 Probiotic PRO is positioned more specifically around microbial pathways associated with endogenous GLP-1 signaling.

These formulas can contain overlapping organisms, so using several Pendulum products at once is not automatically more sophisticated. The useful question is which formulation best matches the reason for using it.

For the wider product-line comparison, see Pendulum Probiotics Compared: Akkermansia, GLP-1, Metabolic Daily and Glucose Control.

Where We Land

The Metabolic Daily concept is interesting because it moves probiotic formulation away from a simple contest over the biggest organism count.

Live Akkermansia is difficult to manufacture and deliver commercially. Butyrate-producing organisms are biologically relevant. Microbial cross-feeding reflects the way bacteria actually behave in a living ecosystem. A closely related five-species combination has produced measurable metabolic effects in randomized human research, while Akkermansia itself now has an expanding human intervention literature.

The discontinuation of Metabolic Daily PRO changes the product choice, but it does not change the underlying microbiome biology. Pendulum's standard Metabolic Daily continues to use the same five bacterial species, including live Akkermansia muciniphila, at the standard 300-million-AFU dose.

There is still plenty we do not know. We do not yet know who benefits most from these specific organisms, whether baseline Akkermansia abundance predicts response in routine clinical use, how long supplementation needs to continue, or whether higher doses would translate into better long-term outcomes.

That is a reasonable place for the science to be. Microbiome medicine is finally moving beyond broad associations and into better human trials. Products like Metabolic Daily are interesting because their design increasingly reflects that science, not because every metabolic question has already been answered.

Frequently Asked Questions

Has Pendulum Metabolic Daily PRO been discontinued?

Yes. Pendulum Life has discontinued Metabolic Daily PRO. The standard Pendulum® Metabolic Daily formula remains available.

What can I use instead of Metabolic Daily PRO?

The closest current Pendulum option is standard Metabolic Daily. It contains the same five bacterial species as the former PRO formulation, including live Akkermansia muciniphila, but provides 300 million AFU per capsule rather than 1 billion AFU.

Were Metabolic Daily and Metabolic Daily PRO the same product?

No. They contained the same five probiotic organisms but were different finished formulations. Standard Metabolic Daily provides 300 million AFU per capsule, while the discontinued Metabolic Daily PRO provided 1 billion AFU per capsule.

Which organisms were in both formulas?

Both formulas contain or contained Akkermansia muciniphila, Clostridium butyricum, Clostridium beijerinckii, Anaerobutyricum hallii, and Bifidobacterium infantis.

Does Metabolic Daily contain live Akkermansia?

Yes. Standard Metabolic Daily contains live Akkermansia muciniphila WB-STR-0001.

Was Metabolic Daily PRO more effective because it contained more AFU?

That was not established. PRO provided approximately 3.3 times the labeled AFU per capsule, but the products were not compared head-to-head in a clinical outcomes trial. A higher AFU count does not automatically mean proportionally greater benefit.

What is butyrate?

Butyrate is a short-chain fatty acid produced by selected intestinal bacteria during fermentation. Colon cells use it as an important energy source, and it participates in normal intestinal-barrier, immune, and metabolic signaling.*

Has Metabolic Daily been clinically shown to lower A1C?

No. Pendulum has published a randomized trial involving a closely related five-organism research formulation in adults with type 2 diabetes, but that formulation was not identical to standard Metabolic Daily or the former Metabolic Daily PRO.

Does Metabolic Daily increase GLP-1?

The intestinal microbiome and microbial metabolites participate in pathways involved in normal endogenous GLP-1 signaling. That does not establish that Metabolic Daily produces a clinically meaningful GLP-1 increase, and probiotics should not be equated with GLP-1 medications.

Can Metabolic Daily help with weight loss?

Metabolic Daily should not be considered a stand-alone weight-loss treatment. Human research involving other Akkermansia preparations has produced interesting weight-related findings, but those results cannot automatically be attributed to this product.

What is the difference between Metabolic Daily and Glucose Control PRO?

Metabolic Daily is a broad five-organism daily microbiome formulation. Glucose Control PRO is the Pendulum product with the closest connection to the company's published clinical research involving glucose control in adults with type 2 diabetes.

How do I take Metabolic Daily?

Current labeling directs adults to take one capsule daily with food. Refrigeration is recommended for optimal quality. Follow the label on the product received or individualized guidance from a healthcare professional.

Selected Research

• Perraudeau F, et al. Improvements to postprandial glucose control in subjects with type 2 diabetes: randomized placebo-controlled trial. BMJ Open Diabetes Research & Care. 2020.
• Increased circulating butyrate and ursodeoxycholate during probiotic intervention in humans with type 2 diabetes.
• Depommier C, et al. Supplementation with Akkermansia muciniphila in overweight and obese human volunteers. Nature Medicine. 2019.
• Mount S, et al. Pasteurized Akkermansia muciniphila for weight-loss maintenance in people with overweight and obesity. Nature Medicine. 2026.
• Pasteurized Akkermansia muciniphila, insulin sensitivity, GLP-1 production, and baseline microbiome status in metabolic syndrome. 2026.

*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.