What is Akkermansia MYO™?

What is Akkermansia MYO™?

 

Key takeaways

  • Akkermansia muciniphila is a naturally occurring probiotic that reinforces the gut barrier, tempers systemic inflammation, and supports healthy metabolic function

  • Akkermansia MYO™ is a postbiotic ingredient derived from Akkermansia muciniphila that uses a proprietary pasteurization process to create a heat-killed bacterial formulation to ensure stability and consistency of benefits

  • Human studies of Spindle+ powered by Akkermansia MYO™ show positive clinical results: lower leg strength improvement, better handgrip strength, and favorable biomarker shifts


Introduction  

Healthy metabolic function underpins some of the body's most essential processes: stabilizing blood glucose, sustaining energy output, and regulating fat storage accumulation. When these systems are disrupted, the consequences extend well beyond the day-to-day; emerging research links metabolic dysfunction to accelerated biological aging and diminished quality of life, with gut microbial composition playing a central role. ¹

Enter Akkermansia muciniphila (pronounced ak-er-MAN-see-ah moo-sin-ih-FIL-ee-yah), a natural bacteria strain in the gut. Discovered in 2004, it has become a growing focus of metabolic health & disease research. ² Unlike more widely recognized probiotics such as Lactobacillus and Bifidobacterium, Akkermansia muciniphila has drawn significant scientific attention for its distinctive relationship with gut barrier integrity, inflammatory processes, and metabolic regulation.

This guide examines the evidence behind Akkermansia's proposed benefits, reviews what clinical and preclinical studies reveal about Akkermansia MYO™ (pronounced MY-oh) specifically, and explores how these findings positively impact longevity and healthspan.

 

The Known Benefits of Akkermansia 

Two decades of scientific research have mapped Akkermansia muciniphila's wide-ranging effects. The results point to several meaningful positive impacts:

  • Strengthens the intestinal barrier

  • Physiologically, the gut's mucosal lining serves as the body's first line of defense – trapping pathogens, neutralizing toxins, and regulating what enters systemic circulation. Akkermansia stimulates mucin production, promoting intestinal regeneration that repairs and reinforces a compromised gut barrier, preventing endotoxins from reaching the bloodstream. ²

  • May improve insulin sensitivity and weight outcomes
    A landmark, first-in-human trial has supported the clinical application of gut microbiome regulation for improved metabolic health (Nature Medicine, 2019). ³  The study found that pasteurized Akkermansia supplementation produced nearly 30% improvement in insulin sensitivity among non-diseased, overweight, insulin-resistant participants or adults with metabolic syndrome. Participants also showed modest reductions in body weight, body mass, and hip circumference.

  • Reduces chronic low-grade inflammation
    Pasteurized Akkermansia muciniphila has been shown to support gut barrier integrity and help regulate inflammatory pathways linked to metabolic and liver health. ² In rodent studies, pasteurized Akkermansia also showed protective effects in models of liver injury, supporting the connection between a healthier gut environment, immune balance, and inflammation regulation. ⁴ 

  • May lower risk of metabolic disease

Chronic inflammation and gut dysbiosis are established contributors to type 2 diabetes risk,⁵ positioning Akkermansia muciniphila's gut-restoring properties as a compelling area of ongoing metabolic health research for healthy adult populations. ⁶  

Spindle Muscle+ powered by Akkermansia MYO™ extends these metabolic benefits into a related but distinct domain: muscle function.7 This specific strain has been proven to activate pathways that support muscle strength and musculoskeletal health – a dimension of gut biology that has only recently come into scientific focus. ⁸

Your gut and muscles are in constant communication – it's called the gut-muscle connection. Gut microbiome diversity influences skeletal muscle health, and how you exercise affects your gut in return.⁸

 

The Gut-Muscle Connection: Why It Matters for Aging 

Muscle strength is more than a fitness metric - it is a well-established longevity marker. A recent study of older women (LaMonte et al. JAMA Network Open. 2026),9 found that functional strength measures, including the ability to rise quickly from a chair and maintain a firm handgrip, were associated with a significantly lower risk of death over eight years. ⁹

Both gut health and muscle mass decline with age. As gut microbiota diversity decreases, the intestinal barrier weakens, allowing more toxins into the bloodstream. This drives systemic inflammation, impairs protein synthesis, and accelerates muscle breakdown – undermining musculoskeletal health.

Skeletal muscle loss begins around age 30 and compounds over time. This progressive, age-related deterioration is known as sarcopenia. ¹⁰

Cultivating a diverse and resilient gut microbiota can interrupt this cycle. By reinforcing the intestinal lining and reducing inflammatory load, improvements in gut ecology translate to measurable benefits in skeletal muscle quality. ⁸ Akkermansia MYO™ operates precisely at this intersection, activating the gut environment that supports muscle maintenance while simultaneously supporting the regulation of hormones involved in inflammation control and muscle preservation. 


How Akkermansia MYO™ Works 

Akkermansia MYO™ is a next-level postbiotic ingredient derived from Akkermansia muciniphila. It supports the production of anti-inflammatory cytokines that help stabilize the gut barrier and help reduce unnecessary muscle breakdown – mechanisms which have been clinically validated to support muscle strength and prevent muscle loss that happens as we age.

In a 12-week randomized, double-blind, placebo-controlled study conducted in 80 healthy, exercising adults (mostly female, aged 60 to 80, supplementation with Akkermansia MYO™ produced statistically significant improvements across multiple outcomes.⁷ 

  • Lower leg strength improved more than 10% vs. placebo – with meaningful implications for balance, mobility, reflex, and overall functional independence.

  • Handgrip strength improvements of more than 5% vs placebo, reflecting broader gains in upper extremity function relevant to daily tasks such as lifting, opening, and grasping.

  • Key biomarker shifts included increased IGF-1 and prealbumin levels, indicating enhanced support for muscle maintenance, alongside decreased plasma myostatin – a protein that, when elevated, promotes early-stage muscle degradation.

The benefits of Spindle Muscle+ powered by Akkermansia MYO™ are clinically proven to help muscle health.

Akkermansia MYO™ is the only Akkermansia strain clinically proven to support muscle strength and muscle mass retention. It supports glucose uptake in muscle cells, helps activate mitochondrial activity within muscle tissue, and could help reduce intramuscular fat – together shifting muscles toward a more energy-efficient, performance-ready state. 

At a structural level, Akkermansia MYO™ promotes normal intestinal regeneration by strengthening the gut barrier and helping to block inflammatory signals that drive muscle breakdown as part of normal metabolism. At the same time, it helps activate immune pathways to strengthen density in weakened muscle fibers.

 

Why Akkermansia MYO™ is Unique

Akkermansia MYO™ is a distinct bacterial variant strain, originally identified in the breast milk of healthy Korean mothers. While Akkermansia muciniphila is naturally present in the human gut, its bioavailability in supplemental form presents a known challenge. Spindle reengineered this strain specifically for effective absorption and consistent delivery.

Unlike conventional live probiotics, Akkermansia MYO™ undergoes a proprietary pasteurization process that preserves biological activity while substantially improving stability and safety. This approach ensures that every capsule delivers reliable, functional postbiotic benefits with reproducible precision – a noteworthy distinction in a category where consistency is often difficult to achieve.

 

Support Your Muscles from the Inside Out 

The clinical evidence behind Spindle's Muscle+ powered by Akkermansia MYO™ changes conventional thinking that muscle building happens only at the source, versus further upstream in the body. Improving gut ecosystem function activates energy production, suppresses muscle catabolism, and helps muscles reach a healthier metabolic state. The downstream effects include restored fiber density, a more favorable environment for muscle protein synthesis, and reduced intramuscular fat in metabolically compromised tissue from normal aging. 

These are not isolated outcomes. A healthier gut environment can support benefits that go beyond digestion, including metabolism and muscle health. Spindle Muscle+ is designed for daily use with a clinically supported approach that helps strengthen the systems working beneath the surface, supporting measurable benefits today and healthy aging over time.

 

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REFERENCES

  1. Dalamaga & Tsigalou. Metabolism Open. 2024;23:100310.

  2. Chiantera et al. Life. 2023;13(6):1247.

  3. Depommier et al. Nature Medicine. 2019;25:1096–1103.

  4. Raftar et al. Scientific Reports. 2022;12:2453.

  5. Al Bander et al. International Journal of Environmental Research and Public Health. 2020;17(20):7618.

  6. Battacan et al. Advances in Biomarker Sciences and Technology. 2026;8:211–218.

  7. Internal data. On file.

  8. Li et al. Frontiers in Nutrition. 2024;11:1418778.

  9. LaMonte et al. JAMA Network Open. 2026;9(2).

  10. Liu & Li. Journal of Cachexia, Sarcopenia and Muscle. 2021;12:1393–1407.

 

Glossary

  • Bioavailability: The degree to which a substance is absorbed and made available for use by the body after ingestion, injection, or topical application.

  • Cytokines: Small signaling proteins secreted by a variety of cell types that regulate inflammation and immune response.

  • Gut dysbiosis: An imbalance in the composition of the gut microbiome, associated with inflammation, metabolic dysfunction, and disease risk.

  • Gut-muscle connection: The bidirectional communication network between intestinal microbiota and skeletal muscle, mediated by metabolic, hormonal, and immune signaling.

  • IGF-1 (Insulin-like Growth Factor 1): A hormone that stimulates cell growth and plays a key role in muscle development and maintenance.

  • Intramuscular fat: Fat deposited within skeletal muscle tissue, associated with impaired muscle function and metabolic disease.

  • Mitochondria: Organelles within cells responsible for producing energy in the form of ATP; their activity in muscle tissue directly affects physical performance and endurance.

  • Mucin: Glycoproteins secreted by the gut lining that form the mucus layer protecting intestinal cells and supporting microbial balance.

  • Muscle catabolism: The breakdown of muscle protein, often accelerated by inflammation, inactivity, aging, or poor nutrition.

  • Myostatin: A protein that inhibits muscle growth and development; elevated levels are associated with accelerated muscle loss.

  • Postbiotic: Inactivated microorganisms or their components that confers a health benefit; distinct from live probiotics.

  • Prealbumin: A blood protein used as a short-term marker that reflects nutritional status and protein adequacy. It’s a relevant biomarker in clinical studies that examine muscle health and tissue maintenance.

  • Sarcopenia: The progressive, age-related loss of skeletal muscle mass and strength, now recognized as a clinical muscle disorder.

  • Systemic inflammation: Chronic, low-grade inflammation affecting the entire body, linked to aging and the development of metabolic and musculoskeletal disease.